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{{Short description|Main-belt asteroid}}
{{one source|date=January 2014}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
{{Infobox planet
| minorplanet=yes
| minorplanet = yes
| name = 779 Nina
| background=#FFFFC0
| background = #D6D6D6
| image=[[File:Orbit of 779 Nina.gif|center|300px]]
| image =
| caption=Orbit of 779 Nina
| image_size =
| name=779 Nina
| caption =
| alt_names=1914 UB, A908 YB, A912 TE
| discovery_ref = &thinsp;<ref name="MPC-object" />
| discoverer=[[G. N. Neujmin]]
| discoverer = [[Grigory Neujmin|G. Neujmin]]
| discovered=25 January 1914
| discovery_site=''[[Simeis]]''
| discovery_site = [[Simeiz Observatory|Simeiz Obs.]]
| discovered = 25 January 1914
| epoch=31 July 2016 ([[Julian day|JD]] 2457600.5)
| mpc_name = (779) Nina
| eccentricity=0.22713
| alt_names = A914 BH{{·}}A908 YB<br />A912 TE{{·}}1914 UB
| semimajor={{Convert|2.6640|AU|Gm|abbr=on}}
| pronounced =
| perihelion={{Convert|2.0589|AU|Gm|abbr=on}}
| named_after = Nina Neujmina<br />{{small|(Discoverer's sister)}}<ref name="springer" />
| aphelion={{Convert|3.2691|AU|Gm|abbr=on|lk=on}}
| mp_category = {{plainlist|
| period=4.35 [[Julian year (astronomy)|yr]] (1588.2 [[Julian year (astronomy)|d]])
* {{nowrap|[[main-belt]]&thinsp;<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|middle]])}}}}
| inclination=14.578°
* [[Background asteroid|background]]&thinsp;<ref name="AstDys-object" /><ref name="Ferret" /><ref name="Zappala-family" />
| asc_node=283.743°
}}
| arg_peri=49.334°
| orbit_ref = &thinsp;<ref name="jpldata" />
| mean_anomaly=343.847[[Degree (angle)|°]]
| epoch = 31 May 2020 ([[Julian day|JD]] 2459000.5)
| p_mean_motion=0.2261
| uncertainty = 0
| abs_magnitude=7.9
| observation_arc = 103.51 [[Julian year (astronomy)|yr]] (37,806 d)
| dimensions=
| aphelion = 3.2707 [[Astronomical unit|AU]]
| mean_radius={{val|38.31|2}} [[Kilometre|km]]
| perihelion = 2.0571 AU
| rotation={{Convert|11.186|h|d|abbr=on|lk=on}}
| semimajor = 2.6639 AU
| albedo={{val|0.1440|0.016}}
| eccentricity = 0.2278
| spectral_type=[[X-type asteroid|X]]
| period = 4.35 yr (1,588 d)
| single_temperature=148-186 K
| mean_anomaly = 301.50[[Degree (angle)|°]]
| mean_motion={{Deg2DMS|0.22667|sup=ms}} / day
| mean_motion = {{Deg2DMS|0.2267|sup=ms}} / day
| orbit_ref=<ref name="jpldata">{{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=779;cad=1 |title=779 Nina (1914 UB) |work=[[JPL Small-Body Database]] |publisher=[[NASA]]/[[Jet Propulsion Laboratory]] |access-date=5 May 2016}}</ref>
| inclination = 14.582°
| observation_arc=99.69 yr (36412 d)
| asc_node = 283.74°
| uncertainty=0
| arg_peri = 49.126°
| moid={{Convert|1.07691|AU|Gm|abbr=on}}
| jupiter_moid={{Convert|2.15559|AU|Gm|abbr=on}}
| dimensions = {{val|79.9|x|79.9|ul=km}}
| mean_diameter = {{plainlist|
| tisserand=3.302
* {{val|76.62|4.0|ul=km}}<ref name="SIMPS" />
* {{val|80.572|2.220|u=km}}<ref name="Mainzer-2016" />
* {{val|81.27|1.00|u=km}}<ref name="AKARI" />
}}
| rotation = {{val|11.186|ul=h}}<ref name="Harris-1992" />
| albedo = {{plainlist|
* {{val|0.132|0.004}}<ref name="AKARI" />
* {{val|0.1440|0.016}}<ref name="SIMPS" />
* {{val|0.157|0.022}}<ref name="Mainzer-2016" />
}}
| spectral_type = {{plainlist|
* [[SMASS classification|SMASS]] {{=}} [[X-type asteroid|X]]&thinsp;<ref name="jpldata" />
* [[X-type asteroid|X]] {{small|([[Small Solar System Objects Spectroscopic Survey|S3OS2]])}}<ref name="Lazzaro-2004" />
* [[M-type asteroid|M]] {{small|(Belskaya)}}<ref name="Belskaya-2017" />
}}
| abs_magnitude = {{plainlist|
* 7.9<ref name="MPC-object" /><ref name="jpldata" />
* 8.10<ref name="Mainzer-2016" /><ref name="Harris-1992" /><ref name="lcdb" /><ref name="Pravec-2012b" />
* 8.30<ref name="SIMPS" /><ref name="AKARI" />}}
}}
}}


'''779 Nina''' ([[Minor planet provisional designation|''prov. designation'']]: {{mp|A914 BH}} ''or'' {{mp|1914 UB}}) is a large [[background asteroid]], approximately {{convert|80|km|mi|abbr=off|sigfig=2|sp=us}} in diameter, located in the central region of the [[asteroid belt]]. It was discovered on 25 January 1914, by Russian astronomer [[Grigory Neujmin]](1886-1946) at the [[Simeiz Observatory]] on the Crimean peninsula.<ref name="MPC-object" /> The metallic [[X-type asteroid]] with an intermediate [[astronomical albedo|albedo]] has a [[rotation period]] of 11.2 hours. It was named after the discoverer's sister, Nina Neujmina (Tsentilovich) (1889–1971).<ref name="springer" />
'''779 Nina''' is a fairly large [[Main-belt asteroid]] orbiting the [[Sun]].


== Orbit and classification ==
==References==
[[File:Orbit of 779 Nina.gif|thumb|left|220px|Orbital diagram of ''Nina'']]
{{Reflist}}

''Nina'' is a non-[[Asteroid family|family]] asteroid of the main belt's [[Background asteroid|background population]] when applying the [[hierarchical clustering method]] to its [[proper orbital elements]].<ref name="AstDys-object" /><ref name="Ferret" /><ref name="Zappala-family" /> It orbits the Sun in the [[Kirkwood gap|central]] main-belt at a distance of 2.1–3.3&nbsp;[[Astronomical unit|AU]] once every 4 years and 4 months (1,588 days; [[semi-major axis]] of 2.66&nbsp;AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.23 and an [[orbital inclination|inclination]] of 15[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The body's was first observed as {{mp|A908 YB}} and {{mp|A912 TE}} at [[Heidelberg Observatory]] on 16 December 1908 and 14 October 1912, respectively. The [[observation arc]] begins at [[Vienna Observatory]] on 31 July 1916, more than two years after to its official discovery observation at [[Simeiz Observatory]] on Crimea.<ref name="MPC-object" />

== Naming ==

This [[minor planet]] was {{MoMP|779|named}} after Nina Nikolaevna Neujmina (Tsentilovich) (1889–1971), mathematician and sister of Russian discoverer [[Grigory Neujmin]](1886-1946).<ref name="springer" />

== Physical characteristics ==

In the Bus–Binzel [[SMASS classification]], ''Nina'' is an [[X-type asteroid]].<ref name="jpldata" /> It is also an X-type in both the Tholen- and SMASS-like taxonomy of the [[Small Solar System Objects Spectroscopic Survey]] (S3OS2).<ref name="Ferret" /><ref name="Lazzaro-2004" /> Belskaya classifies ''Nina'' as a metallic [[M-type asteroid]], which is the equivalent [[Asteroid spectral type|spectral type]] in the [[Tholen classification|Tholen taxonomy]] for X-types with an intermediate albedo ''(see below)''.<ref name="Belskaya-2017" /><ref name="lcdb" />

=== Rotation period ===

In June 1981, a rotational [[lightcurve]] of ''Nina'' was obtained from [[Photometry (astronomy)|photometric]] observations by [[Alan W. Harris|Alan Harris]] at the [[Table Mountain Observatory|Table Mountain]] and [[Lowell Observatory|Lowell]] observatories. Lightcurve analysis gave a [[rotation period]] of {{val|11.186}} hours with a brightness variation of {{val|0.25}} [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=3]]}}).<ref name="Harris-1992" /> It was confirmed by [[Brian D. Warner|Brian Warner]] at his [[Palmer Divide Observatory]] {{Obscode|716}} in Colorado in January 2009, who determined a period of {{val|11.17|0.01}} hours with an amplitude of {{val|0.32|0.02}} magnitude ({{small|[[LCDB quality code|U=3]]}}).<ref name="Warner-2009k" />{{efn|name=lightcurve-plot-Warner}} In September 2012, French amateur astronomer Gérald Rousseau obtained a period of {{val|11.556|0.002}} hours with an amplitude of {{val|0.06}} magnitude ({{small|[[LCDB quality code|U=2+]]}}).<ref name="geneva-obs" />

=== Diameter and albedo ===

According to the surveys carried out by the Infrared Astronomical Satellite [[IRAS]], the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]] (WISE), and the Japanese [[Akari (satellite)|Akari satellite]], ''Nina'' measures ({{val|76.62|4.0}}), ({{val|80.572|2.220}}) and ({{val|81.27|1.00}}) kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of ({{val|0.1440|0.016}}), ({{val|0.157|0.022}}) and ({{val|0.132|0.004}}), respectively.<ref name="SIMPS" /><ref name="Mainzer-2016" /><ref name="AKARI" /> The ''Collaborative Asteroid Lightcurve Link'' adopts [[Petr Pravec]]'s revised WISE-albedo of 0.1694 and takes a diameter of 77.46 kilometers based on an [[absolute magnitude]] of 8.1.<ref name="lcdb" /><ref name="Pravec-2012b" /> The WISE team also published an alternative mean-diameter of ({{val|77.000|6.578|u=km}}) with an albedo of ({{val|0.1740|0.0559}}).<ref name="lcdb" /> On 10 November 2005, an [[asteroid occultation]] of ''Nina'' gave a best-fit ellipse dimension of ({{val|79.9|x|79.9|u=km}}), with a quality rating of 2. These timed observations are taken when the asteroid passes in front of a distant star.<ref name="Ferret" />

== Notes ==
{{notelist|refs=

{{efn|name=lightcurve-plot-Warner|1=[http://www.minorplanetobserver.com/pdolc/A779_2009.HTM Lightcurve plot of (779) Nina], Palmer Divide Observatory, [[Brian D. Warner|Brian Warner]] (2009). Rotation period {{val|11.17|0.01}} hours with a brightness amplitude of {{val|0.32|0.02}} mag. Quality code is 3. Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=779 LCDB].}}

}} <!-- end of notelist -->

== References ==
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
|type = 2020-01-31 last obs.
|title = JPL Small-Body Database Browser: 779 Nina (A914 BH)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000779
|publisher = [[Jet Propulsion Laboratory]]
|access-date = 1 April 2020}}</ref>

<ref name="springer">{{cite book
|title = Dictionary of Minor Planet Names
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|chapter = (779) Nina
|page = 73
|date = 2007
|doi = 10.1007/978-3-540-29925-7_780
|isbn = 978-3-540-00238-3}}</ref>

<ref name="MPC-object">{{cite web
|title = 779 Nina (A914 BH)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=779
|access-date = 1 April 2020}}</ref>

<ref name="geneva-obs">{{cite web
|title = Asteroids and comets rotation curves – (779) Nina
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page3cou.html#000779
|access-date = 1 April 2020}}</ref>

<ref name="SIMPS">{{cite journal
|first1 = E. F. |last1 = Tedesco
|first2 = P. V. |last2 = Noah
|first3 = M. |last3 = Noah
|first4 = S. D. |last4 = Price
|date = October 2004
|title = IRAS Minor Planet Survey V6.0
|url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab
|journal = NASA Planetary Data System
|volume = 12
|pages = IRAS-A-FPA-3-RDR-IMPS-V6.0
|bibcode = 2004PDSS...12.....T
|access-date = 1 April 2020}}</ref>

<ref name="AKARI">{{cite journal
|display-authors = 6
|first1 = Fumihiko |last1 = Usui
|first2 = Daisuke |last2 = Kuroda
|first3 = Thomas G. |last3 = Müller
|first4 = Sunao |last4 = Hasegawa
|first5 = Masateru |last5 = Ishiguro
|first6 = Takafumi |last6 = Ootsubo
|first7 = Daisuke |last7 = Ishihara
|first8 = Hirokazu |last8 = Kataza
|first9 = Satoshi |last9 = Takita
|first10 = Shinki |last10 = Oyabu
|first11 = Munetaka |last11 = Ueno
|first12 = Hideo |last12 = Matsuhara
|first13 = Takashi |last13 = Onaka
|date = October 2011
|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
|journal = Publications of the Astronomical Society of Japan
|volume = 63
|issue = 5
|pages = 1117–1138
|bibcode = 2011PASJ...63.1117U
|doi = 10.1093/pasj/63.5.1117
|doi-access=
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=779 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>

<ref name="Pravec-2012b">{{cite journal
|first1 = Petr |last1 = Pravec
|first2 = Alan W. |last2 = Harris
|first3 = Peter |last3 = Kusnirák
|first4 = Adrián |last4 = Galád
|first5 = Kamil |last5 = Hornoch
|date = September 2012
|title = Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations
|journal = Icarus
|volume = 221
|issue = 1
|pages = 365–387
|bibcode = 2012Icar..221..365P
|doi = 10.1016/j.icarus.2012.07.026}}</ref>

<ref name="Mainzer-2016">{{cite journal
|display-authors = 6
|first1 = A. K. |last1 = Mainzer
|first2 = J. M. |last2 = Bauer
|first3 = R. M. |last3 = Cutri
|first4 = T. |last4 = Grav
|first5 = E. A. |last5 = Kramer
|first6 = J. R. |last6 = Masiero
|first7 = C. R. |last7 = Nugent
|first8 = S. M. |last8 = Sonnett
|first9 = R. A. |last9 = Stevenson
|first10 = E. L. |last10 = Wright
|date = June 2016
|title = NEOWISE Diameters and Albedos V1.0
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab
|journal = NASA Planetary Data System
|bibcode = 2016PDSS..247.....M
|access-date= 1 April 2020}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (779) Nina
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=779
|access-date = 1 April 2020}}</ref>

<ref name="Harris-1992">{{cite journal
|last1 = Harris |first1 = A. W.
|last2 = Young |first2 = J. W.
|last3 = Dockweiler |first3 = Thor
|last4 = Gibson |first4 = J.
|last5 = Poutanen |first5 = M.
|last6 = Bowell |first6 = E.
|date = January 1992
|title = Asteroid lightcurve observations from 1981
|journal = Icarus
|volume = 95
|issue = 1
|pages = 115–147
|bibcode = 1992Icar...95..115H
|issn = 0019-1035
|doi = 10.1016/0019-1035(92)90195-D}}</ref>

<ref name="Warner-2009k">{{cite journal
|last1 = Warner
|first1 = Brian D.
|date = July 2009
|title = Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 December - 2009 March
|journal = Minor Planet Bulletin
|url = http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf
|volume = 36
|issue = 3
|pages = 109–116
|bibcode = 2009MPBu...36..109W
|issn = 1052-8091
|access-date = 1 April 2020
|archive-date = 26 November 2021
|archive-url = https://web.archive.org/web/20211126122428/http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf
|url-status = dead
}}</ref>

<ref name="Belskaya-2017">{{cite journal
|display-authors = 6
|last1 = Belskaya |first1 = I. N.
|last2 = Fornasier |first2 = S.
|last3 = Tozzi |first3 = G. P.
|last4 = Gil-Hutton |first4 = R.
|last5 = Cellino |first5 = A.
|last6 = Antonyuk |first6 = K.
|last7 = Krugly |first7 = Yu. N.
|last8 = Dovgopol |first8 = A. N.
|last9 = Faggi |first9 = S.
|date = March 2017
|title = Refining the asteroid taxonomy by polarimetric observations
|journal = Icarus
|volume = 284
|pages = 30–42
|bibcode = 2017Icar..284...30B
|issn = 0019-1035
|doi = 10.1016/j.icarus.2016.11.003|hdl= 11336/63617
|hdl-access= free
}}</ref>

<ref name="Ferret">{{cite web
|title = Asteroid 779 Nina
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=779+Nina
|access-date = 1 April 2020}}</ref>

<ref name="AstDys-object">{{cite web
|title = Asteroid 779 Nina – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=779
|access-date= 1 April 2020}}</ref>

<ref name="Zappala-family">{{cite journal
|last1 = Zappalà |first1 = V.
|last2 = Bendjoya |first2 = Ph.
|last3 = Cellino |first3 = A.
|last4 = Farinella |first4 = P.
|last5 = Froeschle |first5 = C.
|date = 1997
|title = Asteroid Dynamical Families
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_5_DDR_FAMILY_V4_1/data/family.tab
|journal = NASA Planetary Data System
|pages = EAR-A-5-DDR-FAMILY-V4.1
|access-date = 1 April 2020}} ([https://sbn.psi.edu/pds/resource/family.html PDS main page])</ref>

<ref name="Lazzaro-2004">{{Cite journal
|first1 = D. |last1 = Lazzaro
|first2 = C. A. |last2 = Angeli
|first3 = J. M. |last3 = Carvano
|first4 = T. |last4 = Mothé-Diniz
|first5 = R. |last5 = Duffard
|first6 = M. |last6 = Florczak
|date = November 2004
|title = S3OS2: the visible spectroscopic survey of 820 asteroids
|url = http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf
|journal = Icarus
|volume = 172
|issue = 1
|pages = 179–220
|bibcode = 2004Icar..172..179L
|doi = 10.1016/j.icarus.2004.06.006
|access-date= 1 April 2020}}</ref>

}} <!-- end of reflist -->


== External links ==
== External links ==
* [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at ''www.minorplanet.info''
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets]
* [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – ''Geneva Observatory'', [[Raoul Behrend]]
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|779}}
* {{JPL small body}}
* {{JPL small body}}


{{Minor planets navigator|778 Theobalda|780 Armenia}}
{{Minor planets navigator |778 Theobalda |number=779 |780 Armenia}}
{{Small Solar System bodies}}
{{Small Solar System bodies}}
{{Authority control}}


{{DEFAULTSORT:000779}}
{{DEFAULTSORT:Nina}}
[[Category:Main-belt asteroids|000779]]
[[Category:Background asteroids|000779]]
[[Category:Numbered minor planets|000779]]
[[Category:Discoveries by Grigory Neujmin]]
[[Category:Discoveries by Grigory Neujmin|Nina]]
[[Category:Named minor planets]]
[[Category:Minor planets named for people|Nina]]
[[Category:X-type asteroids (SMASS)|000779]]
[[Category:Named minor planets|Nina]]
[[Category:Astronomical objects discovered in 1914|19140125]]
[[Category:Astronomical objects discovered in 1914|19140125]]


{{Beltasteroid-stub}}

Latest revision as of 16:33, 26 June 2024

779 Nina
Discovery [1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date25 January 1914
Designations
(779) Nina
Named after
Nina Neujmina
(Discoverer's sister)[2]
A914 BH · A908 YB
A912 TE · 1914 UB
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc103.51 yr (37,806 d)
Aphelion3.2707 AU
Perihelion2.0571 AU
2.6639 AU
Eccentricity0.2278
4.35 yr (1,588 d)
301.50°
0° 13m 36.12s / day
Inclination14.582°
283.74°
49.126°
Physical characteristics
Dimensions79.9 km × 79.9 km
  • 76.62±4.0 km[7]
  • 80.572±2.220 km[8]
  • 81.27±1.00 km[9]
11.186 h[10]
  • 0.132±0.004[9]
  • 0.1440±0.016[7]
  • 0.157±0.022[8]

779 Nina (prov. designation: A914 BH or 1914 UB) is a large background asteroid, approximately 80 kilometers (50 miles) in diameter, located in the central region of the asteroid belt. It was discovered on 25 January 1914, by Russian astronomer Grigory Neujmin(1886-1946) at the Simeiz Observatory on the Crimean peninsula.[1] The metallic X-type asteroid with an intermediate albedo has a rotation period of 11.2 hours. It was named after the discoverer's sister, Nina Neujmina (Tsentilovich) (1889–1971).[2]

Orbit and classification

[edit]
Orbital diagram of Nina

Nina is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the central main-belt at a distance of 2.1–3.3 AU once every 4 years and 4 months (1,588 days; semi-major axis of 2.66 AU). Its orbit has an eccentricity of 0.23 and an inclination of 15° with respect to the ecliptic.[3] The body's was first observed as A908 YB and A912 TE at Heidelberg Observatory on 16 December 1908 and 14 October 1912, respectively. The observation arc begins at Vienna Observatory on 31 July 1916, more than two years after to its official discovery observation at Simeiz Observatory on Crimea.[1]

Naming

[edit]

This minor planet was named after Nina Nikolaevna Neujmina (Tsentilovich) (1889–1971), mathematician and sister of Russian discoverer Grigory Neujmin(1886-1946).[2]

Physical characteristics

[edit]

In the Bus–Binzel SMASS classification, Nina is an X-type asteroid.[3] It is also an X-type in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2).[5][11] Belskaya classifies Nina as a metallic M-type asteroid, which is the equivalent spectral type in the Tholen taxonomy for X-types with an intermediate albedo (see below).[12][13]

Rotation period

[edit]

In June 1981, a rotational lightcurve of Nina was obtained from photometric observations by Alan Harris at the Table Mountain and Lowell observatories. Lightcurve analysis gave a rotation period of 11.186 hours with a brightness variation of 0.25 magnitude (U=3).[10] It was confirmed by Brian Warner at his Palmer Divide Observatory (716) in Colorado in January 2009, who determined a period of 11.17±0.01 hours with an amplitude of 0.32±0.02 magnitude (U=3).[15][a] In September 2012, French amateur astronomer Gérald Rousseau obtained a period of 11.556±0.002 hours with an amplitude of 0.06 magnitude (U=2+).[16]

Diameter and albedo

[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite, Nina measures (76.62±4.0), (80.572±2.220) and (81.27±1.00) kilometers in diameter and its surface has an albedo of (0.1440±0.016), (0.157±0.022) and (0.132±0.004), respectively.[7][8][9] The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-albedo of 0.1694 and takes a diameter of 77.46 kilometers based on an absolute magnitude of 8.1.[13][14] The WISE team also published an alternative mean-diameter of (77.000±6.578 km) with an albedo of (0.1740±0.0559).[13] On 10 November 2005, an asteroid occultation of Nina gave a best-fit ellipse dimension of (79.9 km × 79.9 km), with a quality rating of 2. These timed observations are taken when the asteroid passes in front of a distant star.[5]

Notes

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  1. ^ Lightcurve plot of (779) Nina, Palmer Divide Observatory, Brian Warner (2009). Rotation period 11.17±0.01 hours with a brightness amplitude of 0.32±0.02 mag. Quality code is 3. Summary figures at the LCDB.

References

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  1. ^ a b c d e "779 Nina (A914 BH)". Minor Planet Center. Retrieved 1 April 2020.
  2. ^ a b c Schmadel, Lutz D. (2007). "(779) Nina". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 73. doi:10.1007/978-3-540-29925-7_780. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "JPL Small-Body Database Browser: 779 Nina (A914 BH)" (2020-01-31 last obs.). Jet Propulsion Laboratory. Retrieved 1 April 2020.
  4. ^ a b "Asteroid 779 Nina – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 1 April 2020.
  5. ^ a b c d "Asteroid 779 Nina". Small Bodies Data Ferret. Retrieved 1 April 2020.
  6. ^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 1 April 2020. (PDS main page)
  7. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 1 April 2020.
  8. ^ a b c d Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M. Retrieved 1 April 2020.
  9. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
  10. ^ a b c Harris, A. W.; Young, J. W.; Dockweiler, Thor; Gibson, J.; Poutanen, M.; Bowell, E. (January 1992). "Asteroid lightcurve observations from 1981". Icarus. 95 (1): 115–147. Bibcode:1992Icar...95..115H. doi:10.1016/0019-1035(92)90195-D. ISSN 0019-1035.
  11. ^ a b Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 1 April 2020.
  12. ^ a b Belskaya, I. N.; Fornasier, S.; Tozzi, G. P.; Gil-Hutton, R.; Cellino, A.; Antonyuk, K.; et al. (March 2017). "Refining the asteroid taxonomy by polarimetric observations". Icarus. 284: 30–42. Bibcode:2017Icar..284...30B. doi:10.1016/j.icarus.2016.11.003. hdl:11336/63617. ISSN 0019-1035.
  13. ^ a b c d "LCDB Data for (779) Nina". Asteroid Lightcurve Database (LCDB). Retrieved 1 April 2020.
  14. ^ a b Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026.
  15. ^ Warner, Brian D. (July 2009). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 December - 2009 March" (PDF). Minor Planet Bulletin. 36 (3): 109–116. Bibcode:2009MPBu...36..109W. ISSN 1052-8091. Archived from the original (PDF) on 26 November 2021. Retrieved 1 April 2020.
  16. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (779) Nina". Geneva Observatory. Retrieved 1 April 2020.
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