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{{Short description|Main-belt asteroid}}
#REDIRECT [[List of minor planets: 1001–2000#901]]
{{Use dmy dates|date=October 2019}}
{{R to list entry}}
{{Infobox planet
{{R unprintworthy}}
| minorplanet = yes
| name = 1987 Kaplan
| background = #D6D6D6
| image = File:1987Kaplan (Lightcurve Inversion).png
| image_scale =
| caption = [[Lightcurve]]-based 3D-model of ''Kaplan''
| discovery_ref = <ref name="jpldata" />
| discoverer = [[Pelageya Shajn|P. F. Shajn]]
| discovery_site = [[Simeiz Observatory|Simeiz Obs.]]
| discovered = 11 September 1952
| mpc_name = (1987) Kaplan
| alt_names = 1952 RH
| pronounced =
| named_after = [[Samuil Aronovich Kaplan|Samuil Kaplan]]<ref name="springer" /><br />{{small|(Soviet astrophysicist)}}
| mp_category = [[main-belt]]{{·}}{{small|([[Kirkwood gap|inner]])}}<br />[[Phocaea family|Phocaea]]<ref name="lcdb" /><ref name="Ferret" />
| orbit_ref = <ref name="jpldata" />
| epoch = 4 September 2017 ([[Julian day|JD]] 2458000.5)
| uncertainty = 0
| observation_arc = 64.54 yr (23,573 days)
| aphelion = 2.9234 [[Astronomical unit|AU]]
| perihelion = 1.8422 AU
| semimajor = 2.3828 AU
| eccentricity = 0.2269
| period = 3.68 [[Julian year (astronomy)|yr]] (1,343 days)
| mean_anomaly = 238.97[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.2680|sup=ms}} / day
| inclination = 23.645°
| asc_node = 314.23°
| arg_peri = 38.176°
| dimensions = {{val|11.70|2.27}} km<ref name="Nugent-2016" /><br />{{val|13.017|0.159}} km<ref name="Masiero-2011" /><br />{{val|13.52|0.39}} km<ref name="AKARI" /><br />13.89 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|14.606|0.104}} km<ref name="WISE" />
| rotation = {{val|9.453|0.002}} [[Hour|h]]<ref name="Warner-2012c" />{{efn|name=lightcurve-plot-Warner-2011}}<br />{{val|9.45950|0.00005}} h<ref name="Hanus-2013c" /><br />{{val|9.46|0.01}} h<ref name="Warner-2011g" />{{efn|name=lightcurve-plot-Warner-2000}}<br />{{val|9.49|0.02}} h<ref name="Warner-2001c" />
| albedo = {{val|0.2094|0.0448}}<ref name="WISE" /><br />0.23 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.262|0.053}}<ref name="Masiero-2011" /><br />{{val|0.278|0.017}}<ref name="AKARI" /><br />{{val|0.28|0.12}}<ref name="Nugent-2016" />
| spectral_type = [[S-type asteroid|S]] {{small|(assumed)}}<ref name="lcdb" />
| abs_magnitude = 11.40<ref name="AKARI" />{{·}}11.5<ref name="jpldata" /><ref name="lcdb" /><ref name="WISE" />{{·}}11.81<ref name="Nugent-2016" />{{·}}{{val|12.23|1.34}}<ref name="Veres-2015" />
}}


'''1987 Kaplan''', provisional designation {{mp|1952 RH}}, is a stony Phocaea [[asteroid]] from the inner regions of the [[asteroid belt]], approximately 14 kilometers in diameter. It was discovered on 11 September 1952, by Soviet astronomer [[Pelageya Shajn]] at the [[Simeiz Observatory]] on the Crimean peninsula.<ref name="MPC-object" /> The asteroid was named after Soviet astrophysicist [[Samuil Aronovich Kaplan|Samuil Kaplan]].<ref name="springer" />
<!--

Before reverting this redirect into an article, please
== Orbit and classification ==
check whether the content will satisfy the guidelines for

astronomical object notability on WP:NASTRO. In particular,
''Kaplan'' is a member of the [[Phocaea family]] ({{small|[[FIN tbl#701|701]]}}),<ref name="lcdb" /><ref name="Ferret" /> a large [[asteroid family|family]] of stony asteroids with nearly two thousand known members.<ref name="Nesvorny-2014" />{{rp|23}}
the object must have significant coverage from independent,

reliable sources. Just because an object is listed in a
It orbits the Sun in the [[Kirkwood gap|inner]] main belt at a distance of 1.8–2.9&nbsp;[[Astronomical unit|AU]] once every 3 years and 8 months (1,343 days). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.23 and an [[orbital inclination|inclination]] of 24[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The body's [[observation arc]] begins with its official discovery observation at Simeiz in September 1952.<ref name="MPC-object" />
database (like the JPL Small-Body Database) does not mean it

is notable.
== Physical characteristics ==
-->

''Kaplan'' is an assumed [[S-type asteroid]], in agreement with the overall [[Asteroid spectral type|spectral type]] of the [[Phocaea family]].<ref name="Nesvorny-2014" />{{rp|23}}

=== Rotation period ===

Between 2000 and 2011, three rotational [[lightcurve]]s of ''Kaplan'' were obtained from photometric observations by astronomer [[Brian D. Warner|Brian Warner]] at his Palmer Divide Observatory in Colorado, United States. Lightcurve analysis gave a well-defined [[rotation period]] between 9.453 and 9.49 hours with a brightness amplitude from 0.46 to 0.65 [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=3/3/3]]}}).<ref name="Warner-2012c" /><ref name="Warner-2011g" /><ref name="Warner-2001c" />{{efn|name=lightcurve-plot-Warner-2000}}{{efn|name=lightcurve-plot-Warner-2011}}

=== Poles ===

In addition a modeled lightcurve, using photometric data from various sources, gave a concurring period of 9.45950 hours and determined two spin axis of (356.0°, −58.0°) and (233.0°, −89.0°) in [[Ecliptic coordinate system|ecliptic coordinates]].<ref name="Hanus-2013c" />

=== Diameter and albedo ===

According to the surveys carried out by the Japanese [[Akari (satellite)|Akari satellite]] and the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], ''Kaplan'' measures between 11.70 and 14.606 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] between 0.2094 and 0.28.<ref name="Nugent-2016" /><ref name="Masiero-2011" /><ref name="AKARI" /><ref name="WISE" />

The ''Collaborative Asteroid Lightcurve Link'' assumes an albedo of 0.23 – derived from [[25&nbsp;Phocaea]], the family's parent body and namesake, and calculates a diameter of 13.89 kilometers based on an [[absolute magnitude]] of 11.5.<ref name="lcdb" />

== Naming ==

This [[minor planet]] was named after [[Samuil Kaplan]] (1921–1978), Soviet astronomer and astrophysicist at Lvov University Observatory ({{small|[[IAU code#067|067]]}}), Ukraine, and at the [[Radiophysical Research Institute]] in Nizhny Novgorod (formerly known as Gorky), Russia. His research included a variety of astrophysical fields, such as [[white dwarfs]], [[interstellar matter]], [[radiative transfer]], [[solar radiation]], [[pulsar]]s and [[galactic nuclei]].<ref name="springer" />

The official naming citation was published by the [[Minor Planet Center]] on 1 June 1980 ({{small|[[Minor Planet Circulars|M.P.C.]] 5358}}).<ref name="MPC-Circulars-Archive" />

== Notes ==
{{notelist|refs=

{{efn|name=lightcurve-plot-Warner-2000|1=[http://www.minorplanetobserver.com/pdolc/A1987_2000.HTM Lightcurve plot of (1987) Kaplan], Brian Warner at the Palmer Divide Observatory (2000). Rotation period {{val|9.46|0.01}} hours with a brightness amplitude of {{val|0.47|0.01}} mag. Quality code of 3. Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1987%7CKaplan LCDB].}}

{{efn|name=lightcurve-plot-Warner-2011|1=[http://www.minorplanetobserver.com/pdolc/A1987_2011.HTM Lightcurve plot of (1987) Kaplan], Brian Warner at the Palmer Divide Observatory (2011). Rotation period {{val|9.453|0.002}} hours with a brightness amplitude of {{val|0.65|0.02}} mag. Quality code of 3. Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1987%7CKaplan LCDB].}}

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

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

<ref name="jpldata">{{cite web
|type = 2017-03-27 last obs.
|title = JPL Small-Body Database Browser: 1987 Kaplan (1952 RH)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001987
|publisher = Jet Propulsion Laboratory
|access-date = 1 November 2017}}</ref>

<ref name="springer">{{cite book
|last = Schmadel | first = Lutz D.
|title = Dictionary of Minor Planet Names |publisher = Springer Berlin Heidelberg
|page = 161
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_1988 |chapter = (1987) Kaplan }}</ref>

<ref name="MPC-object">{{cite web
|title = 1987 Kaplan (1952 RH)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1987
|access-date = 1 November 2017}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 1 November 2017}}</ref>

<ref name="Masiero-2011">{{cite journal
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = A. K. |last2 = Mainzer
|first3 = T. |last3 = Grav
|first4 = J. M. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T. IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
|access-date= 1 November 2017}}</ref>

<ref name="Ferret">{{cite web
|title = Asteroid 1987 Kaplan – Nesvorny HCM Asteroid Families V3.0
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1987+Kaplan#Asteroid%201987%20KaplanEAR-A-VARGBDET-5-NESVORNYFAM-V3.0
|access-date = 26 October 2019}}</ref>

<ref name="Nesvorny-2014">{{Cite book
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|chapter = Identification and Dynamical Properties of Asteroid Families
|title = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|isbn = 978-0-8165-3213-1}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (1987) Kaplan
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1987%7CKaplan
|access-date = 1 November 2017}}</ref>

<ref name="Nugent-2016">{{cite journal
|display-authors = 6
|first1 = C. R. |last1 = Nugent
|first2 = A. |last2 = Mainzer
|first3 = J. |last3 = Bauer
|first4 = R. M. |last4 = Cutri
|first5 = E. A. |last5 = Kramer
|first6 = T. |last6 = Grav
|first7 = J. |last7 = Masiero
|first8 = S. |last8 = Sonnett
|first9 = E. L. |last9 = Wright
|date = September 2016
|title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos
|journal = The Astronomical Journal
|volume = 152
|issue = 3
|page = 12
|bibcode = 2016AJ....152...63N
|doi = 10.3847/0004-6256/152/3/63
|arxiv = 1606.08923
|doi-access = free }}</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= free
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1987 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>

<ref name="WISE">{{cite journal
|display-authors = 6
|first1 = A. |last1 = Mainzer
|first2 = T. |last2 = Grav
|first3 = J. |last3 = Masiero
|first4 = E. |last4 = Hand
|first5 = J. |last5 = Bauer
|first6 = D. |last6 = Tholen
|first7 = R. S. |last7 = McMillan
|first8 = T. |last8 = Spahr
|first9 = R. M. |last9 = Cutri
|first10 = E. |last10 = Wright
|first11 = J. |last11 = Watkins
|first12 = W. |last12 = Mo
|first13 = C. |last13 = Maleszewski
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 25
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|arxiv = 1109.6407}}</ref>

<ref name="Warner-2001c">{{Cite journal
|author = Warner, B.
|date = September 2001
|title = Asteroid Photometry at the Palmer Divide Observatory
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2001MPBu...28...40W
|journal = The Minor Planet Bulletin
|volume = 28
|pages = 40–41
|bibcode = 2001MPBu...28...40W
|access-date= 1 November 2017}}</ref>

<ref name="Warner-2011g">{{Cite journal
|author = Warner, Brian D.
|date = January 2011
|title = Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...63W
|journal = The Minor Planet Bulletin
|volume = 38
|issue = 1
|pages = 63–65
|issn = 1052-8091
|bibcode = 2011MPBu...38...63W
|access-date= 1 November 2017}}</ref>

<ref name="Warner-2012c">{{Cite journal
|author = Warner, Brian D.
|date = April 2012
|title = Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2011 September – December
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...69W
|journal = The Minor Planet Bulletin
|volume = 39
|issue = 2
|pages = 69–80
|issn = 1052-8091
|bibcode = 2012MPBu...39...69W
|access-date= 1 November 2017}}</ref>

<ref name="Hanus-2013c">{{cite journal
|display-authors = 6
|first1 = J. |last1 = Hanus
|first2 = M. |last2 = Broz
|first3 = J. |last3 = Durech
|first4 = B. D. |last4 = Warner
|first5 = J. |last5 = Brinsfield
|first6 = R. |last6 = Durkee
|first7 = D. |last7 = Higgins
|first8 = R. A. |last8 = Koff
|first9 = J. |last9 = Oey
|first10 = F. |last10 = Pilcher
|first11 = R. |last11 = Stephens
|first12 = L. P. |last12 = Strabla
|first13 = Q. |last13 = Ulisse
|first14 = R. |last14 = Girelli
|date = November 2013
|title = An anisotropic distribution of spin vectors in asteroid families
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H
|journal = Astronomy and Astrophysics
|volume = 559
|page = 19
|bibcode = 2013A&A...559A.134H
|doi = 10.1051/0004-6361/201321993
|arxiv = 1309.4296
|access-date= 1 November 2017}}</ref>

<ref name="Veres-2015">{{cite journal
|display-authors = 6
|first1 = Peter |last1 = Veres
|first2 = Robert |last2 = Jedicke
|first3 = Alan |last3 = Fitzsimmons
|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
|first6 = Bryce |last6 = Bolin
|first7 = Serge |last7 = Chastel
|first8 = Richard J. |last8 = Wainscoat
|first9 = William S. |last9 = Burgett
|first10 = Kenneth C. |last10 = Chambers
|first11 = Heather |last11 = Flewelling
|first12 = Nick |last12 = Kaiser
|first13 = Eugen A. |last13 = Magnier
|first14 = Jeff S. |last14 = Morgan
|first15 = Paul A. |last15 = Price
|first16 = John L. |last16 = Tonry
|first17 = Christopher |last17 = Waters
|date = November 2015
|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V
|journal = Icarus
|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= 1 November 2017}}</ref>

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

== External links ==
* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
* [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] – Observatoire de Genève, Raoul Behrend
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|1987}}
* {{JPL small body}}

{{Minor planets navigator |1986 Plaut |number=1987 |1988 Delores }}
{{Small Solar System bodies}}
{{Authority control}}


{{DEFAULTSORT:Kaplan}}
{{DEFAULTSORT:Kaplan}}
[[Category:Main-belt asteroids|001987]]
[[Category:Phocaea asteroids|001987]]
[[Category:Asteroids named for people]]
[[Category:Astronomical objects discovered in 1952|19520911]]
[[Category:Discoveries by Pelageya Shajn]]
[[Category:Discoveries by Pelageya Shajn]]
[[Category:Minor planet redirects|1987 Kaplan]]
[[Category:Named minor planets]]
[[Category:Astronomical objects discovered in 1952|19520911]]

Latest revision as of 17:05, 10 April 2024

1987 Kaplan
Lightcurve-based 3D-model of Kaplan
Discovery[1]
Discovered byP. F. Shajn
Discovery siteSimeiz Obs.
Discovery date11 September 1952
Designations
(1987) Kaplan
Named after
Samuil Kaplan[2]
(Soviet astrophysicist)
1952 RH
main-belt · (inner)
Phocaea[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc64.54 yr (23,573 days)
Aphelion2.9234 AU
Perihelion1.8422 AU
2.3828 AU
Eccentricity0.2269
3.68 yr (1,343 days)
238.97°
0° 16m 4.8s / day
Inclination23.645°
314.23°
38.176°
Physical characteristics
Dimensions11.70±2.27 km[5]
13.017±0.159 km[6]
13.52±0.39 km[7]
13.89 km (calculated)[3]
14.606±0.104 km[8]
9.453±0.002 h[9][a]
9.45950±0.00005 h[10]
9.46±0.01 h[11][b]
9.49±0.02 h[12]
0.2094±0.0448[8]
0.23 (assumed)[3]
0.262±0.053[6]
0.278±0.017[7]
0.28±0.12[5]
S (assumed)[3]
11.40[7] · 11.5[1][3][8] · 11.81[5] · 12.23±1.34[13]

1987 Kaplan, provisional designation 1952 RH, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 11 September 1952, by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula.[14] The asteroid was named after Soviet astrophysicist Samuil Kaplan.[2]

Orbit and classification

[edit]

Kaplan is a member of the Phocaea family (701),[3][4] a large family of stony asteroids with nearly two thousand known members.[15]: 23 

It orbits the Sun in the inner main belt at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,343 days). Its orbit has an eccentricity of 0.23 and an inclination of 24° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Simeiz in September 1952.[14]

Physical characteristics

[edit]

Kaplan is an assumed S-type asteroid, in agreement with the overall spectral type of the Phocaea family.[15]: 23 

Rotation period

[edit]

Between 2000 and 2011, three rotational lightcurves of Kaplan were obtained from photometric observations by astronomer Brian Warner at his Palmer Divide Observatory in Colorado, United States. Lightcurve analysis gave a well-defined rotation period between 9.453 and 9.49 hours with a brightness amplitude from 0.46 to 0.65 magnitude (U=3/3/3).[9][11][12][b][a]

Poles

[edit]

In addition a modeled lightcurve, using photometric data from various sources, gave a concurring period of 9.45950 hours and determined two spin axis of (356.0°, −58.0°) and (233.0°, −89.0°) in ecliptic coordinates.[10]

Diameter and albedo

[edit]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kaplan measures between 11.70 and 14.606 kilometers in diameter and its surface has an albedo between 0.2094 and 0.28.[5][6][7][8]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23 – derived from 25 Phocaea, the family's parent body and namesake, and calculates a diameter of 13.89 kilometers based on an absolute magnitude of 11.5.[3]

Naming

[edit]

This minor planet was named after Samuil Kaplan (1921–1978), Soviet astronomer and astrophysicist at Lvov University Observatory (067), Ukraine, and at the Radiophysical Research Institute in Nizhny Novgorod (formerly known as Gorky), Russia. His research included a variety of astrophysical fields, such as white dwarfs, interstellar matter, radiative transfer, solar radiation, pulsars and galactic nuclei.[2]

The official naming citation was published by the Minor Planet Center on 1 June 1980 (M.P.C. 5358).[16]

Notes

[edit]
  1. ^ a b Lightcurve plot of (1987) Kaplan, Brian Warner at the Palmer Divide Observatory (2011). Rotation period 9.453±0.002 hours with a brightness amplitude of 0.65±0.02 mag. Quality code of 3. Summary figures at the LCDB.
  2. ^ a b Lightcurve plot of (1987) Kaplan, Brian Warner at the Palmer Divide Observatory (2000). Rotation period 9.46±0.01 hours with a brightness amplitude of 0.47±0.01 mag. Quality code of 3. Summary figures at the LCDB.

References

[edit]
  1. ^ a b c d "JPL Small-Body Database Browser: 1987 Kaplan (1952 RH)" (2017-03-27 last obs.). Jet Propulsion Laboratory. Retrieved 1 November 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1987) Kaplan". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 161. doi:10.1007/978-3-540-29925-7_1988. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1987) Kaplan". Asteroid Lightcurve Database (LCDB). Retrieved 1 November 2017.
  4. ^ a b "Asteroid 1987 Kaplan – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
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  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
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  11. ^ a b Warner, Brian D. (January 2011). "Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 38 (1): 63–65. Bibcode:2011MPBu...38...63W. ISSN 1052-8091. Retrieved 1 November 2017.
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  14. ^ a b "1987 Kaplan (1952 RH)". Minor Planet Center. Retrieved 1 November 2017.
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  16. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 November 2017.
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