| Discovery[1] | |
|---|---|
| Discovered by | A. Mrkos |
| Discovery site | Kleť Obs. |
| Discovery date | 18 April 1985 |
| Designations | |
| (9931) Herbhauptman | |
Named after | Herbert A. Hauptman[1] (American mathematician) |
| 1985 HH · 1982 QJ1 1996 HA1 | |
| main-belt[1][2] · (inner)[3] Nysa[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.60yr (13,004 d) |
| Aphelion | 2.7991AU |
| Perihelion | 1.9573 AU |
| 2.3782 AU | |
| Eccentricity | 0.1770 |
| 3.67 yr (1,340 d) | |
| 329.47° | |
| 0° 16m 7.32s / day | |
| Inclination | 2.4717° |
| 157.21° | |
| 80.707° | |
| Physical characteristics | |
| 4.54 km(calculated)[3] 5.179±0.368 km[5][6] | |
| 4.438±0.0091 h[7] 4.44±0.020 h[8] | |
| 0.20(assumed)[3] 0.239±0.042[5][6] | |
| S[3][9] | |
| 13.6[6] 13.629±0.001(R)[7] 13.660±0.090(R)[8] 13.7[2] 14.06±0.32[9] 14.08[3] | |
9931 Herbhauptman, provisional designation1985 HH, is a stony Nysianasteroid from the inner regions of theasteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 18 April 1985, by Czech astronomerAntonín Mrkos at theKleť Observatory in former Czechoslovakia.[1] TheS-type asteroid has arotation period of 4.44 hours.[3] It was named after American mathematician and Nobel laureateHerbert A. Hauptman.[1]
Herbhauptman is member of theNysa family (405),[4] one of the largestasteroid families.[10]
It orbits the Sun in theinner main-belt at a distance of 2.0–2.8 AU once every 3 years and 8 months (1,340 days;semi-major axis of 2.38 AU). Its orbit has aneccentricity of 0.18 and aninclination of 2° with respect to theecliptic.[2] The body'sobservation arc begins with its first observations as1982 QJ1 atPalomar Observatory in August 1982.[1]
Herbhauptman has been characterized as a stonyS-type asteroid byPan-STARRS' survey.[3][9]
In 2014, two rotationallightcurves ofHerbhauptman have been obtained fromphotometric observations in the R-band by astronomers at thePalomar Transient Factory in California.[7][8] Lightcurve analysis gave arotation period of 4.438 and 4.44 hours with a brightness amplitude of 0.15 and 0.21magnitude, respectively (U=2/2).[3]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Herbhauptman measures 5.179 kilometers in diameter and its surface has analbedo of 0.239,[5][6] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for astony asteroid of 0.20 and calculates a diameter of 4.54 kilometers based on anabsolute magnitude of 14.08.[3]
Thisminor planet was named after American mathematicianHerbert A. Hauptman (1917–2011), who was awarded with theNobel Prize in Chemistry fordevelopingdirect methods for the determination ofcrystal structures in 1985.[1] The official naming citation was published by theMinor Planet Center on 28 September 2004 (M.P.C. 52767).[11]
