| Discovery[1] | |
|---|---|
| Discovered by | M. F. Wolf A. Schwassmann |
| Discovery site | Heidelberg Obs. |
| Discovery date | 4 June 1900 |
| Designations | |
| (456) Abnoba | |
| Pronunciation | /ˈæbnəbə/[2][3] |
Named after | Abnoba[4] (Celtic mythology) |
| 1900 FH · 1952 YF | |
| main-belt · (middle) background[5] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.07 yr (42,761 days) |
| Aphelion | 3.2873AU |
| Perihelion | 2.2894 AU |
| 2.7884 AU | |
| Eccentricity | 0.1789 |
| 4.66yr (1,701 days) | |
| 86.313° | |
| 0° 12m 42.12s / day | |
| Inclination | 14.439° |
| 229.21° | |
| 6.6794° | |
| Physical characteristics | |
| Dimensions | 37.64±1.44 km[6] 37.713±0.222 km[7] 39.76±3.6 km[8] 39.94 km(derived)[9] 42.65±0.65 km[10] 50.495±1.215 km[11] |
| 18±1 h[12] 18.2026±0.0002h[12] 18.273±0.005 h[13][a] 18.281±0.001 h[14] | |
| 0.1467±0.0261[11] 0.204±0.008[10] 0.2335±0.048[8] 0.2537(derived)[9] 0.286±0.033[6] | |
| SMASS =S[1][9] S[15] | |
| 9.10[6][9] · 9.20[1][8][10][11] | |
456 Abnoba, provisional designation1900 FH, is a stony backgroundasteroid from the central regions of theasteroid belt, approximately 40 kilometers in diameter. It was discovered on 4 June 1900, by astronomersMax Wolf andArnold Schwassmann at theHeidelberg-Königstuhl State Observatory in southwest Germany.[16] The asteroid was named after the Celtic deityAbnoba.[4]
Abnoba is a non-family asteroid from the main belt'sbackground population.[5] It orbits the Sun in thecentral main-belt at a distance of 2.3–3.3 AU once every 4 years and 8 months (1,701 days). Its orbit has aneccentricity of 0.18 and aninclination of 14° with respect to theecliptic.[1]
The body'sobservation arc begins atBordeaux Observatory, eleven days after its official discovery observation at Heidelberg.[16]
In theSMASS classification,Abnoba is a stonyS-type asteroid.[1] Its stony composition was also confirmed by polarimetric observations in 2017.[15]
Several rotationallightcurves ofAbnoba have been obtained from photometric observations since 2004.[12][13][a] Analysis of the best-rated lightcurve from the Bigmuskie Observatory (B88) in Italy, gave arotation period of 18.281 hours with a brightness amplitude of 0.32magnitude (U=3).[14]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Abnoba measures between 37.64 and 50.495 kilometers in diameter and its surface has analbedo between 0.1467 and 0.286.[6][7][8][10][11]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.2537 and a diameter of 39.94 kilometers based on anabsolute magnitude of 9.1.[9]
456 Abnoba has been observed tooccult 6 stars between 2006 and 2023.
Thisminor planet was named after the Gaulish goddessAbnoba from Celtic mythology. The goddess was worshipped in the Black Forest of southern Germany, and known as "Diana Abnoba" to the Roman troops stationed in this region. The official naming citation was authored byLutz D. Schmadel based on his own research.[4]
