| Discovery[1] | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 9 October 1980 |
| Designations | |
| (3333) Schaber | |
Named after | Gerald Gene Schaber[1] (American geologist) |
| 1980 TG5 · 1964 WR 1975 XM2 | |
| main-belt[1][2] · (outer)[3] background[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 52.42yr (19,147 d) |
| Aphelion | 3.8276AU |
| Perihelion | 2.4390 AU |
| 3.1333 AU | |
| Eccentricity | 0.2216 |
| 5.55 yr (2,026 d) | |
| 333.25° | |
| 0° 10m 39.72s / day | |
| Inclination | 11.967° |
| 231.17° | |
| 66.155° | |
| Physical characteristics | |
| 25.44 km(calculated)[3] 26.538±0.262 km[5][6] 27.67±0.52 km[7] | |
| 10.971±0.002 h[8] | |
| 0.044±0.002[7] 0.048±0.010[5][6] 0.057(assumed)[3] | |
| C(assumed)[3] | |
| 11.7[2][3] · 11.80[7][6] 12.05±0.25[9] | |
3333 Schaber, provisional designation1980 TG5, is a dark backgroundasteroid from the outer regions of theasteroid belt, approximately 26 kilometers (16 miles) in diameter. It was discovered on 9 October 1980, by American astronomerCarolyn Shoemaker at thePalomar Observatory in California.[1] The presumably elongatedC-type asteroid has arotation period of 10.97 hours.[3] It was named after American geologistGerald Schaber of theUSGS.[1]
Schaber is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theouter asteroid belt at a distance of 2.4–3.8 AU once every 5 years and 7 months (2,026 days;semi-major axis of 3.13 AU). Its orbit has aneccentricity of 0.22 and aninclination of 12° with respect to theecliptic.[2]
The asteroid was first observed as1964 WR at thePurple Mountain Observatory in November 1969. The body'sobservation arc begins at Palomar on 7 October 1980, or two nights prior to its official discovery observation.[1]
Schaber is an assumedC-type asteroid.[3]
In September 2009, a rotationallightcurve of Schaber was obtained fromphotometric observations by Maurice Clark at the Montgomery College Observatory in Maryland. Lightcurve analysis gave arotation period of 10.971 hours with a brightness amplitude of 0.46magnitude, indicative for a somewhat elongated shape (U=3-).[8]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer, Schaber measures 26.538 and 27.67 kilometers in diameter and its surface has analbedo of 0.048 and 0.044, respectively.[5][6][7]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 25.44 kilometers based on anabsolute magnitude of 11.7.[3]
Thisminor planet was named after American Gerald Gene Schaber, geologist with theUnited States Geological Survey, who headed the USGS'sastrogeology branch in the 1980s. He has studied the geology of the Moon, Mars, Venus and Mercury as well as that of Jupiter's volcanic moonIo.[1] Schaber also named theNorth Complex, a feature on the lunar surface. The official naming citation was published by theMinor Planet Center on 26 March 1986 (M.P.C. 10549).[10]
