| Discovery[1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | Crimea–Nauchnij |
| Discovery date | 1 April 1976 |
| Designations | |
| (2312) Duboshin | |
Named after | Georgij Nikolaevich Duboshin[2] (Soviet-Russian astronomer) |
| 1976 GU2 · 1943 DH 1971 QJ · 1972 TJ7 1973 YE2 · 1975 CF 1976 JN | |
| main-belt · (outer)[3] Hilda[1][4] · background[5] | |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 74.35yr (27,157 d) |
| Aphelion | 4.5826AU |
| Perihelion | 3.3399 AU |
| 3.9613 AU | |
| Eccentricity | 0.1568 |
| 7.88 yr (2,880 d) | |
| 250.24° | |
| 0° 7m 30s / day | |
| Inclination | 5.1650° |
| 61.441° | |
| 342.00° | |
| Physical characteristics | |
| 50.122±0.750 km[6] 54.94±3.1 km[7] 58.53±1.37 km[8] | |
| 50.78±0.03 h[9][a] | |
| 0.044±0.002[8] 0.0496±0.006[7] 0.06±0.01[6] | |
| Tholen =D[3][4] · D[6] B–V = 0.73[3] U–B = 0.246[3] | |
| 10.18[3][4][7][8] · 10.2[10] | |
2312 Duboshin, provisional designation1976 GU2, is a dark Hildianasteroid from the outermost regions of theasteroid belt, approximately 54 kilometers (34 miles) in diameter. It was discovered on 1 April 1976, by Soviet–Russian astronomerNikolai Chernykh at theCrimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] It was named after Russian astronomerGeorgij Duboshin.[2][11] TheD-type asteroid has a longer than averagerotation period of 50.78 hours.[4]
Duboshin is an asteroids of the dynamicalHilda group which stay in a 3:2orbital resonance with Jupiter.[1][4] It is, however, not a member of the collisionalHilda family but a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[5]
It orbits the Sun in theoutermost asteroid belt at a distance of 3.3–4.6 AU once every 7 years and 11 months (2,880 days;semi-major axis of 3.96 AU). Its orbit has aneccentricity of 0.16 and aninclination of 5° with respect to theecliptic.[3] The asteroid was first observed as1943 DH atTurku Observatory in February 1943, where the body'sobservation arc begins on the same day with aprecovery.[1]
In theTholen classification,Duboshin is a darkD-type asteroid.[3][4] TheWide-field Infrared Survey Explorer (WISE) also characterized it as a D-type.[6]
In April 2016, a rotationallightcurve ofDuboshin was obtained fromphotometric observations byRobert Stephens at theCenter for Solar System Studies (U81) in California. Lightcurve analysis gave a longrotation period of 50.78 hours with a brightness amplitude of 0.15magnitude, indicative for a nearly spherical shape (U=2+).[9][a] While not being aslow rotator, it has a notably longer period than that seen for most other asteroids, which rotate every 2 to 20 hours once around their axis.
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA's WISE telescope,Duboshin measures between 50.122 and 58.53 kilometers in diameter and its surface has analbedo between 0.044 and 0.06.[6][7][8]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0496 and a diameter of 54.94 kilometers based on anabsolute magnitude of 10.18.[4]
Thisminor planet was named after Russian astronomer Georgij Nikolaevich Duboshin (1904–1986), expert oncelestial mechanics, author of several textbooks, and former president ofIAU's Commission 7,Celestial Mechanics and Dynamical Astronomy in the early 1970s.[2][11] The official naming citation was published by theMinor Planet Center on 1 December 1982 (M.P.C. 7471).[12]
