| Discovery[1] | |
|---|---|
| Discovered by | S. J. Bus |
| Discovery site | Palomar Obs. |
| Discovery date | 30 September 1975 |
| Designations | |
| (6216) San Jose | |
Named after | San Jose[1] (City in California) |
| 1975 SJ · 1975 VH2 1984 SV4 · 1989 VG | |
| main-belt[1][2] · (middle) background[3] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.86yr (22,961 d) |
| Aphelion | 3.0346AU |
| Perihelion | 2.4719 AU |
| 2.7533 AU | |
| Eccentricity | 0.1022 |
| 4.57 yr (1,669 d) | |
| 68.316° | |
| 0° 12m 56.52s / day | |
| Inclination | 3.7717° |
| 30.489° | |
| 27.604° | |
| Physical characteristics | |
| 8.033±0.149 km[4] | |
| 0.208±0.024[4] | |
| 13.0[2] | |
6216 San Jose, provisional designation1975 SJ, is a backgroundasteroid from the central regions of theasteroid belt, approximately 8 kilometers (5 miles) in diameter. It was discovered on 30 September 1975, by American astronomerSchelte Bus at thePalomar Observatory. The asteroid was named for the city ofSan Jose in California.[1]
San Jose is a non-family asteroid from the main belt'sbackground population.[3] It orbits the Sun in thecentral asteroid belt at a distance of 2.5–3.0 AU once every 4 years and 7 months (1,669 days;semi-major axis of 2.75 AU). Its orbit has aneccentricity of 0.10 and aninclination of 4° with respect to theecliptic.[2] The body'sobservation arc begins with aprecovery taken at Palomar in April 1954.[1]
San Jose'sspectral type is unknown.[2] Based on its albedo(see below), it is likely a stonyS-type asteroid. It has anabsolute magnitude of 13.0.[2]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,San Jose measures 8.033 kilometers in diameter and its surface has analbedo of 0.208.[4]
As of 2018, no rotationallightcurve ofSan Jose has been obtained fromphotometric observations. The body'srotation period,pole and shape remain unknown.[2]
Thisminor planet was named for the city ofSan Jose, California, United States, for its long support of nearbyLick Observatory particularly in efforts to reduce light pollution.[5]The official naming citation was published by theMinor Planet Center on 14 December 1997 (M.P.C. 31024).[6]
