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{{Short description|Large main belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
{{Infobox planet
| minorplanet=yes
| minorplanet=yes
| background=#FFFFC0
| background=#D6D6D6
| name=335 Roberta
| name=335 Roberta
|image= Орбита астероида 335.png
|caption=Orbital diagram
| discoverer=[[Anton Staus]]
| discoverer=[[Anton Staus]]
| discovered=1 September 1892
| discovered=1 September 1892
| mpc_name=(335) Roberta
| alt_names=1892 C
| alt_names=1892 C
| named_after=[[Karl Robert Osten-Sacken]]
| named_after=[[Carl Robert Osten-Sacken]]
| mp_category=[[Asteroid belt|Main belt]]
| mp_category=[[Asteroid belt|Main belt]]
| orbit_ref=<ref name=jpldata/>
| orbit_ref=<ref name=jpldata/>
Line 44: Line 49:
Under the [[SMASS classification]] taxonomy, this asteroid is listed as a [[B-type asteroid|B-type]]; a group that combines both the Tholen B and F types. The spectrum of this object suggests the presence of [[magnetite]] (Fe<sub>3</sub>O<sub>4</sub>), which gives it the spectrally-blue coloration that is a characteristic of this SMASS class. The spectrum of this asteroid also displays a band feature near 2.9&nbsp;μm that indicate the presence of a hydrated mineral. This suggests that the asteroid has undergone significant water-based alteration.<ref name=aj140_3_692/>
Under the [[SMASS classification]] taxonomy, this asteroid is listed as a [[B-type asteroid|B-type]]; a group that combines both the Tholen B and F types. The spectrum of this object suggests the presence of [[magnetite]] (Fe<sub>3</sub>O<sub>4</sub>), which gives it the spectrally-blue coloration that is a characteristic of this SMASS class. The spectrum of this asteroid also displays a band feature near 2.9&nbsp;μm that indicate the presence of a hydrated mineral. This suggests that the asteroid has undergone significant water-based alteration.<ref name=aj140_3_692/>


335 Roberta was identified as one of three asteroids that were likely to be a parent body for [[chondrite]]s along with [[449 Hamburga]] and [[304 Olga]].<ref name="books.google.com">[https://books.google.com/books?id=kJDvAAAAMAAJ&q=%22449+Hamburga%22&dq=%22449+Hamburga%22&hl=en&sa=X&ved=0CBwQ6AEwADgeahUKEwiz86-8xNPHAhUEj4AKHdbtB-E Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996]</ref> All three asteroids were known to have low-albedo (not reflect as much light) and be close to "meteorite producing resonances".<ref name="books.google.com"/> Chrondrites are the most common type of meteor found on Earth, accounting for over 80% of all meteors.<ref name="ASU - Chondrites">[https://meteorites.asu.edu/meteorites/meteorite-types/stony-meteorites/chondrites ASU - Chondrites]</ref> They are named for the tiny spherical silicate particles that are found inside them (those particles are called chondrules).<ref name="ASU - Chondrites"/>
335 Roberta was identified as one of three asteroids that were likely to be a parent body for [[chondrite]]s along with [[449 Hamburga]] and [[304 Olga]].<ref name="books.google.com">[https://books.google.com/books?id=kJDvAAAAMAAJ&q=%22449+Hamburga%22 Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996]</ref> All three asteroids were known to have low-albedo (not reflect as much light) and be close to "meteorite producing resonances".<ref name="books.google.com"/> Chrondrites are the most common type of meteor found on Earth, accounting for over 80% of all meteors.<ref name="ASU - Chondrites">{{Cite web |url=https://meteorites.asu.edu/meteorites/meteorite-types/stony-meteorites/chondrites |title=ASU - Chondrites |access-date=31 August 2015 |archive-date=22 June 2019 |archive-url=https://web.archive.org/web/20190622023849/https://meteorites.asu.edu/meteorites/meteorite-types/stony-meteorites/chondrites |url-status=dead }}</ref> They are named for the tiny spherical silicate particles that are found inside them (those particles are called chondrules).<ref name="ASU - Chondrites"/>


==References==
==References==
Line 50: Line 55:


<ref name="Obituary">{{Cite journal
<ref name="Obituary">{{Cite journal
|language = German
|language = de
|author = Kutter, A.
|author = Kutter, A.
|date = December 1957
|date = December 1957
Line 65: Line 70:
| work = Discovery Circumstances
| work = Discovery Circumstances
| publisher = IAU Minor Planet center
| publisher = IAU Minor Planet center
| url = http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html
| url = https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html
| accessdate= 7 April 2013
| access-date= 7 April 2013
| postscript= .
| postscript= .
}}</ref>
}}</ref>
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| title = 335 Roberta
| title = 335 Roberta
| work = JPL Small-Body Database Browser
| work = JPL Small-Body Database Browser
| publisher = NASA Jet Propulsion Laboratory
| publisher = [[NASA Jet Propulsion Laboratory]]
| url = http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=335
| url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=335
| accessdate= 11 May 2016
| access-date= 11 May 2016
}}</ref>
}}</ref>


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| postscript= .
| postscript= .
}}</ref>
}}</ref>
}}


}} <!-- end of reflist -->
⚫
==External links==

⚫
== External links ==
* [http://www.minorplanetobserver.com/pdolc/A335_2007.HTM Lightcurve plot of 335 Roberta], Palmer Divide Observatory, [[Brian D. Warner|B. D. Warner]] (2007)
* [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 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|335}}
* {{JPL small body}}
* {{JPL small body}}


{{Minor planets navigator|334 Chicago|number=335|336 Lacadiera}}
{{Minor planets navigator |334 Chicago |number=335 |336 Lacadiera}}
{{Small Solar System bodies}}
{{Small Solar System bodies}}
{{Authority control}}


{{DEFAULTSORT:000335}}
{{DEFAULTSORT:Roberta}}
[[Category:Main-belt asteroids]]
[[Category:Background asteroids|000335]]
[[Category:Numbered minor planets]]
[[Category:Discoveries by Anton Staus]]
[[Category:Discoveries by Anton Staus|Roberta]]
[[Category:Named minor planets]]
[[Category:Minor planets named for people|Roberta]]
[[Category:FP-type asteroids (Tholen)|000335]]
[[Category:Named minor planets|Roberta]]
[[Category:B-type asteroids (SMASS)|000335]]
[[Category:FP-type asteroids (Tholen)]]
[[Category:B-type asteroids (SMASS)]]
[[Category:Astronomical objects discovered in 1892|18920901]]
[[Category:Astronomical objects discovered in 1892|18920901]]

Latest revision as of 09:21, 2 August 2024

335 Roberta
Orbital diagram
Discovery
Discovered byAnton Staus
Discovery date1 September 1892
Designations
(335) Roberta
Named after
Carl Robert Osten-Sacken
1892 C
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.58 yr (45137 d)
Aphelion2.9014 AU (434.04 Gm)
Perihelion2.04926 AU (306.565 Gm)
2.47530 AU (370.300 Gm)
Eccentricity0.17212
3.89 yr (1422.5 d)
18.93 km/s
355.460°
0° 15m 11.095s / day
Inclination5.1005°
148.454°
140.006°
Earth MOID1.03587 AU (154.964 Gm)
Jupiter MOID2.2733 AU (340.08 Gm)
TJupiter3.456
Physical characteristics
Dimensions89.07±2.0 km[1]
12.054 h (0.5023 d)
0.0580±0.003[1]
0.058[2]
B–V = 0.624
U–B = 0.235
FP (Tholen)
B (SMASS)[1]
8.96[1]

335 Roberta is a large main belt asteroid. It was discovered on 1 September 1892, by German astronomer Anton Staus at Heidelberg Observatory.[3] Roberta was the 12th asteroid that was discovered using photography, and the only asteroid discovery made by Staus.[4]

Photometric observations of this asteroid from multiple sites during 2007 gave a light curve with a period of 12.054 ± 0.003 hours and a brightness variation of 0.13 ± 0.02 in magnitude. This agrees with a result reported in 1992, but differs from period estimates of 8.03 hours and 4.349 reported in 1987 and 2001, respectively.[5]

Under the SMASS classification taxonomy, this asteroid is listed as a B-type; a group that combines both the Tholen B and F types. The spectrum of this object suggests the presence of magnetite (Fe3O4), which gives it the spectrally-blue coloration that is a characteristic of this SMASS class. The spectrum of this asteroid also displays a band feature near 2.9 μm that indicate the presence of a hydrated mineral. This suggests that the asteroid has undergone significant water-based alteration.[2]

335 Roberta was identified as one of three asteroids that were likely to be a parent body for chondrites along with 449 Hamburga and 304 Olga.[6] All three asteroids were known to have low-albedo (not reflect as much light) and be close to "meteorite producing resonances".[6] Chrondrites are the most common type of meteor found on Earth, accounting for over 80% of all meteors.[7] They are named for the tiny spherical silicate particles that are found inside them (those particles are called chondrules).[7]

References

[edit]
  1. ^ a b c d e "335 Roberta", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016
  2. ^ a b Yang, Bin; Jewitt, David (September 2010), "Identification of Magnetite in B-type Asteroids", The Astronomical Journal, 140 (3): 692–698, arXiv:1006.5110, Bibcode:2010AJ....140..692Y, doi:10.1088/0004-6256/140/3/692
  3. ^ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
  4. ^ Kutter, A. (December 1957). "Nachruf auf Anton Staus (Obituary)". Mitteilungen der Astronomischen Gesellschaft (in German). 9: 5. Bibcode:1958MitAG...9....5K. Retrieved 6 July 2016.
  5. ^ Warner, Brian D.; et al. (December 2007), "Lightcurve Analysis of 335 Roberta", The Minor Planet Bulletin, vol. 34, no. 4, p. 99, Bibcode:2007MPBu...34...99W.
  6. ^ a b Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996
  7. ^ a b "ASU - Chondrites". Archived from the original on 22 June 2019. Retrieved 31 August 2015.
[edit]
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