| 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 | |
| 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) |
| Aphelion | 2.1792AU |
| Perihelion | 1.7932 AU |
| 1.9862 AU | |
| Eccentricity | 0.0972 |
| 2.80yr (1,022 days) | |
| 264.67° | |
| 0° 21m 7.56s / day | |
| Inclination | 24.598° |
| 15.003° | |
| 332.15° | |
| Physical characteristics | |
| Dimensions | 4.62 km(calculated)[4] 4.839±0.167 km[5] |
| 560±25h(dated)[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 designation1987 SJ3, is a stony Hungariaasteroid and exceptionallyslow rotator from the inner regions of theasteroid belt, approximately 4.7 kilometers in diameter.
It was discovered on 27 September 1987, by American astronomer coupleCarolyn andEugene Shoemaker at the U.S.Palomar Observatory in California.[3] The asteroid was later named after American paleontologistDavid M. Raup.[2]
Raup is a brightS-type asteroid is a member of theHungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in theinnermost main-belt at a distance of 1.8–2.2 AU once every 2 years and 10 months (1,022 days). Its orbit has aneccentricity of 0.10 and aninclination of 25° with respect to theecliptic.[1]
It was first identified as1955 BF1 at the discovering observatory in 1955, extending the body'sobservation arc by 32 years prior to its official discovery observation.[3]
In September 2015, a rotationallightcurve ofRaup was obtained fromphotometric observations by American astronomerBrian Warner at his Palmer Divide Station in Colorado. It gave a well-definedrotation period of1320±10 hours with a brightness variation of 1.34magnitude (U=3-).[7]
As of 2016, it is the3rd slowest rotating minor planet in theLight 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 of560±25 hours with an amplitude of 1.05 magnitude (U=2).[6]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Raup measures 4.8 kilometers in diameter and its surface has a highalbedo of 0.329,[5] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for Hungaria asteroids of 0.30, and calculates a diameter of 4.6 kilometers, based on anabsolute magnitude of 13.6.[4]
Thisminor planet was named in honor of AmericanDavid M. Raup (1933–2015),paleontologist and expert on thefossil record atUChicago. Raup's theories contributed to the knowledge ofextinction 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]
