Astronomy:9165 Raup
| Discovery [1] | |
|---|---|
| Discovered by | C. Shoemaker E. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 27 September 1987 |
| Designations | |
| (9165) Raup | |
| Named after | David M. Raup (paleontologist)[2] |
| 1987 SJ3 · 1955 BF1 1973 UH | |
| Minor planet category | main-belt · (inner) [1] Hungaria [3][4] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 29.60 yr (10,810 days) |
| |{{{apsis}}}|helion}} | 2.1792 AU |
| |{{{apsis}}}|helion}} | 1.7932 AU |
| 1.9862 AU | |
| Eccentricity | 0.0972 |
| Orbital period | 2.80 yr (1,022 days) |
| Mean anomaly | 264.67° |
| Mean motion | 0° 21m 7.56s / day |
| Inclination | 24.598° |
| Longitude of ascending node | 15.003° |
| 332.15° | |
| Physical characteristics | |
| Dimensions | 4.62 km (calculated)[4] 4.839±0.167 km[5] |
| Rotation period | 560±25 h (dated)[6] 1320±10 h[7] |
| Geometric albedo | 0.30 (assumed)[4] 0.329±0.058[5] |
| S [4] | |
| Absolute magnitude (H) | 13.40[5] · 13.6[1][4] |
9165 Raup, provisional designation 1987 SJ3, is a stony Hungaria asteroid and exceptionally slow rotator from the inner regions of the asteroid belt, approximately 4.7 kilometers in diameter.
It was discovered on 27 September 1987, by American astronomer couple Carolyn and Eugene Shoemaker at the U.S. Palomar Observatory in California.[3] The asteroid was later named after American paleontologist David M. Raup.[2]
Classification and orbit
Raup is a bright S-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the innermost main-belt at a distance of 1.8–2.2 AU once every 2 years and 10 months (1,022 days). Its orbit has an eccentricity of 0.10 and an inclination of 25° with respect to the ecliptic.[1]
It was first identified as 1955 BF1 at the discovering observatory in 1955, extending the body's observation arc by 32 years prior to its official discovery observation.[3]
Physical characteristics
Slow rotator
In September 2015, a rotational lightcurve of Raup was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Station in Colorado. It gave a well-defined rotation period of 1320±10 hours with a brightness variation of 1.34 magnitude ({{{1}}}).[7]
As of 2016, it is the 3rd slowest rotating minor planet in the Light Curve Data Base (LCDB).[4] Also, the lightcurve's high amplitude indicates that the body has a non-spheroidal shape. Brian Warner's 2015-observation supersedes a previously obtained lightcurve that gave a significantly shorter period of 560±25 hours with an amplitude of 1.05 magnitude ({{{1}}}).[6]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Raup measures 4.8 kilometers in diameter and its surface has a high albedo of 0.329,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for Hungaria asteroids of 0.30, and calculates a diameter of 4.6 kilometers, based on an absolute magnitude of 13.6.[4]
Naming
This minor planet was named in honor of American David M. Raup (1933–2015), paleontologist and expert of the fossil record at UChicago. Raup's theories contributed to the knowledge of extinction events and suggested, that the extinction of dinosaurs was part of a cycle of mass extinctions.[2] the official naming citation was published on 23 November 1999 (M.P.C. 36947).[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 9165 Raup (1987 SJ3)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009165.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(9165) Raup". Dictionary of Minor Planet Names – (9165) Raup. Springer Berlin Heidelberg. p. 681. doi:10.1007/978-3-540-29925-7_7397. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 "9165 Raup (1987 SJ3)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=9165.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 "LCDB Data for (9165) Raup". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=9165%7CRaup.
- ↑ 5.0 5.1 5.2 5.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 13 September 2016.
- ↑ 6.0 6.1 Warner, Brian D. (July 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January-March". The Minor Planet Bulletin 41 (3): 144–155. ISSN 1052-8091. Bibcode: 2014MPBu...41..144W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..144W. Retrieved 13 September 2016.
- ↑ 7.0 7.1 Warner, Brian D. (April 2016). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 October-December". The Minor Planet Bulletin 43 (2): 137–140. ISSN 1052-8091. Bibcode: 2016MPBu...43..137W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..137W. Retrieved 13 September 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 9165 Raup at AstDyS-2, Asteroids—Dynamic Site
- 9165 Raup at the JPL Small-Body Database
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