| Discovery[1] | |
|---|---|
| Discovered by | E. F. Skvortsov |
| Discovery site | Simeiz Obs. |
| Discovery date | 3 August 1930 |
| Designations | |
| (1167) Dubiago | |
Named after | Alexander Dubyago (also spelled:Dubiago)[2] |
| 1930 PB · 1931 VJ1 1938 WW · 1950 QX A924 RF | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.71 yr (31,671 days) |
| Aphelion | 3.6517AU |
| Perihelion | 3.1772 AU |
| 3.4145 AU | |
| Eccentricity | 0.0695 |
| 6.31yr (2,305 days) | |
| 314.09° | |
| 0° 9m 22.32s / day | |
| Inclination | 5.7477° |
| 223.39° | |
| 71.344° | |
| Physical characteristics | |
| Dimensions | 63.12±5.6 km(IRAS:17)[4] 75.79±0.90 km[5] |
| 14.3h[6] 34.8374±0.0990 h[7] | |
| 0.036±0.001[5] 0.0509±0.010(IRAS:17)[4] | |
| Tholen =D[1] · D[3] B–V = 0.743[1] U–B = 0.196[1] | |
| 9.51±0.29[8] · 9.513±0.001(R)[7] · 9.85[1][3][4][5] | |
1167 Dubiago, provisional designation1930 PB, is a darkasteroid from the outer region of theasteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 August 1930, by Soviet astronomerEvgenii Skvortsov atSimeiz Observatory on the Crimean peninsula, and named after astronomerAlexander Dubyago.[9][2]
Dubiago orbits the Sun in theouter main-belt at a distance of 3.2–3.7 AU once every 6 years and 4 months (2,305 days). Its orbit has aneccentricity of 0.07 and aninclination of 6° with respect to theecliptic.[1] In 1924, it was first identified asA924 RF at the discovering observatory. The body'sobservation arc begins atYerkes Observatory about two months after its official discovery at Simeiz.[9]
In theTholen classification,Dubiago is aD-type asteroid, a group of 46 known bodies, mostly beingJupiter trojans andcentaurs such as10199 Chariklo and624 Hektor.[10] It is thought that the Martian moonPhobos has a similar composition, and that theTagish Lake meteorite origins from a D-type asteroid.
In March 1990, a rotationallightcurve ofDubiago was obtained using theNordic Optical Telescope at theLa Palma site on the Canary Islands. Lightcurve analysis gave arotation period of 14.3 hours with a brightness variation of 0.23magnitude (U=2).[6] A second lightcurve was obtained in the R-band at thePalomar Transient Factory in October 2013, giving an alternative period solution of 34.8374 hours with an amplitude of 0.21 magnitude (U=2).[7]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS and the JapaneseAkari satellite,Dubiago measures 63.12 and 75.79 kilometers in diameter, and its surface has analbedo of 0.051 and 0.036, respectively.[4][5] TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS with anabsolute magnitude of 9.85.[3]
Thisminor planet was named in honor ofAlexander Dubyago (1903–1959), a renowned astronomer of the Soviet Union. The lunar craterDubyago is also named in his and his father's honour.[2] The approved naming was suggested by the RussianInstitute of Theoretical Astronomy (ITA) and the officialnaming citation was published by theMinor Planet Center on 1 June 1967 (M.P.C. 2740).[11]
