| Discovery[1] | |
|---|---|
| Discovered by | Y. Mizuno T. Furuta |
| Discovery site | Kani Obs. |
| Discovery date | 8 October 1989 |
| Designations | |
| (7648) Tomboles | |
Named after | Tom Boles[1] (Scottish astronomer) |
| 1989 TB1 · 1981 CE 1984 BK1 · 1986 WD10 | |
| main-belt[1][2] · (inner) background[3] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 36.42yr (13,301 d) |
| Aphelion | 2.3980AU |
| Perihelion | 1.9152 AU |
| 2.1566 AU | |
| Eccentricity | 0.1119 |
| 3.17 yr (1,157 d) | |
| 316.41° | |
| 0° 18m 40.32s / day | |
| Inclination | 2.7210° |
| 11.756° | |
| 53.726° | |
| Physical characteristics | |
| 3.914±0.123 km[4] | |
| 0.200±0.027[4] | |
| 14.3[1][2] | |
7648 Tomboles, provisional designation1989 TB1, is a backgroundasteroid from the inner regions of theasteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 8 October 1989, by Japanese astronomersYoshikane Mizuno andToshimasa Furuta at theKani Observatory inKani, Japan. The asteroid was named after Scottish amateur astronomerTom Boles.[1]
Tomboles is a non-family asteroid from the main belt'sbackground population.[3] It orbits the Sun in theinner main-belt at a distance of 1.9–2.4 AU once every 3 years and 2 months (1,157 days;semi-major axis of 2.16 AU). Its orbit has aneccentricity of 0.11 and aninclination of 3° with respect to theecliptic.[2]
The body'sobservation arc begins with its first observation as1981 CE at theKlet Observatory in February 1981.[1]
Tomboles has anabsolute magnitude of 14.3.[1][2] While itsspectral type is unknown, it is likely a stonyS-type asteroid based on the albedo(see below) derived from observations with theWide-field Infrared Survey Explorer (WISE). As of 2018, no rotationallightcurve of this asteroid has been obtained fromphotometric observations. The body'srotation period,pole and shape remain unknown.[2]
According to the survey carried out by theNEOWISE mission of NASA's WISE telescope,Tomboles measures 3.91 kilometers in diameter and its surface has analbedo of 0.20.[4]
Thisminor planet was named after Scottish amateur astronomerTom Boles (born 1944) adiscoverer of a minor planet(also see84417 Ritabo) and a record-number ofsupernovae, using a robotic telescope at Coddenham Observatory (234) inCoddenham, Suffolk, in eastern England. Boles has been the President of theBritish Astronomical Association from 2003 to 2005.[1]
The official naming citation was published by theMinor Planet Center on 13 November 2008 (M.P.C. 64311).[5]
