| Discovery[1] | |
|---|---|
| Discovered by | B. A. Skiff |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 12 January 1983 |
| Designations | |
| (13006) Schwaar | |
Named after | Pierre–Yves Schwaar (Americanamateur astronomer)[2] |
| 1983 AC1 · 1990 DH | |
| main-belt · Phocaea[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 34.21 yr (12,495 days) |
| Aphelion | 2.7336AU |
| Perihelion | 1.8143 AU |
| 2.2739 AU | |
| Eccentricity | 0.2021 |
| 3.43yr (1,252 days) | |
| 29.457° | |
| 0° 17m 14.64s / day | |
| Inclination | 28.523° |
| 129.27° | |
| 358.22° | |
| Physical characteristics | |
| Dimensions | 5.04 km(calculated)[3] 5.325±0.052[5] 5.892±0.113 km[6] |
| 6.8h[7] | |
| 0.182±0.038[5] 0.1850±0.0281[6] 0.23(assumed)[3] | |
| S[3][8] | |
| 13.6[6] · 13.7[1][3] · 13.97±0.22[8] | |
13006 Schwaar, provisional designation1983 AC1, is a stony Phocaeaasteroid from the inner regions of theasteroid belt, approximately 5 kilometers in diameter. It was discovered on 12 January 1983, by American astronomerBrian Skiff at Lowell'sAnderson Mesa Station in Flagstaff, Arizona.[9] The asteroid was named after amateur astronomerPierre–Yves Schwaar.[2]
Schwaar is a member of thePhocaea family (701),[4] a rather small group of asteroids with similar orbital characteristics, named after its largest member,25 Phocaea. It orbits the Sun in theinner main-belt at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,252 days). Its orbit has aneccentricity of 0.20 and aninclination of 29° with respect to theecliptic.[1] Noprecoveries were taken. The asteroid'sobservation arc begins 20 days after its discovery.[9]
Schwaar has been characterized as aS-type asteroid byPan-STARRS photometric survey.[8]
A rotationallightcurve ofSchwaar was obtained from photometric observations made at the Hunters Hill Observatory (E14), Australia, and collaborating stations in December 2006. The lightcurve gave arotation period of6.8 hours with a brightness variation of 0.17 inmagnitude (U=3-).[7]
According to the survey carried out by theNEOWISE mission of NASA's space-basedWide-field Infrared Survey Explorer,Schwaar measures 5.3 and 5.9 kilometers in diameter and its surface has analbedo of 0.182 and 0.185, respectively,[6][5] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for members of the Phocaea family of 0.23, and calculates a diameter of 5.0 kilometers with anabsolute magnitude of 13.7.[3]
Thisminor planet was named in memory amateur astronomer Pierre–Yves Schwaar (1946–2000), member of the Saguaro Astronomy Club (SAC), telescope maker, and photographer of the night sky.[2] The official naming citation was published by theMinor Planet Center on 9 January 2001 (M.P.C. 41939).[10] The native Swiss amateur astronomer and immigrant to the U.S. was also an inventor and master craftsman, a model rocketeer, anUSAF aircraft mechanic, a Vietnam veteran, and an eclipse chaser.
