9165 Raup

9165 Raup
Discovery [1]
Discovered by C. Shoemaker
E. Shoemaker
Discovery site Palomar Obs.
Discovery date 27 September 1987
Designations
MPC designation 9165 Raup
Named after
 David M. Raup
(paleontologist)[2]
1987 SJ3 · 1955 BF1
1973 UH
main-belt [1] · Hungaria [3][4]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 28.34 yr (10,350 days)
Aphelion 2.1796 AU
Perihelion 1.7933 AU
1.9864 AU
Eccentricity 0.0972
2.80 yr (1,023 days)
194.44°
0° 21m 7.2s / day
Inclination 24.600°
15.005°
332.00°
Physical characteristics
Dimensions 4.62 km (calculated)[4]
4.839±0.167 km[5]
560±25 h (superseded)[6]
1320±10 h[7]
0.30 (assumed)[4]
0.329±0.058[5]
S [4]
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 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 at a distance of 1.8–2.2 AU once every 2 years and 10 months (1,023 days). Its orbit has an eccentricity of 0.10 and an inclination of 25° with respect to the ecliptic.[1] The first precovery was taken at the discovering observatory in 1955, extending the asteroid's observation arc by 32 years prior to its discovery.[3]

    In September 2015, a rotational light-curve was obtained for this asteroid from photometric observations by U.S. astronomer Brian D. Warner at the Palmer Divide Station, Colorado. It gave a well-defined rotation period of 1320±10 hours with a brightness variation of 1.34 magnitude (U=3-).[7] As of 20116, it is the 3rd slowest rotating minor planet in the Light Curve Data Base (LCDB).[4] Also, the light-curve's high amplitude indicates that the body has a non-spheroidal shape. Brian Warner's 2015-observation supersedes a previously obtained light-curve that gave a significantly shorter period of 560±25 hours with an amplitude of 1.05 magnitude (U=2).[6]

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid 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]

    The 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] Naming citation was published on 23 November 1999 (M.P.C. 36947).[8]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 9165 Raup (1987 SJ3)" (2016-01-28 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9165) Raup. Springer Berlin Heidelberg. p. 681. ISBN 978-3-540-00238-3. Retrieved 13 September 2016.
    3. 1 2 3 "9165 Raup (1987 SJ3)". Minor Planet Center. Retrieved 13 September 2016.
    4. 1 2 3 4 5 6 7 "LCDB Data for (9165) Raup". Asteroid Lightcurve Database (LCDB). Retrieved 13 September 2016.
    5. 1 2 3 4 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. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 13 September 2016.
    6. 1 2 Warner, Brian D. (July 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January-March". The Minor Planet Bulletin. 41 (3): 144–155. Bibcode:2014MPBu...41..144W. ISSN 1052-8091. Retrieved 13 September 2016.
    7. 1 2 Warner, Brian D. (April 2016). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 October-December". The Minor Planet Bulletin. 43 (2): 137–140. Bibcode:2016MPBu...43..137W. ISSN 1052-8091. Retrieved 13 September 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 September 2016.

    External links

    This article is issued from Wikipedia - version of the 12/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.