Discovered by E. F. Skvortsov MPC designation 1167 Dubiago Observation arc 85.64 yr (31,279 days) Inclination 5.7298° Asteroid group Asteroid belt | Discovery date 3 August 1930 Minor planet category main-belt · (outer) Discovered 3 August 1930 Orbits Sun | |
Alternative names 1930 PB · 1931 VJ11938 WW · 1950 QXA924 RF Discoverer Evgenii Fedorovich Skvortsov | ||
1167 Dubiago, provisional designation 1930 PB, is a dark asteroid from the outer region of the asteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 August 1930, by Soviet astronomer Evgenii Skvortsov at Simeiz Observatory on the Crimean peninsula.
Dubiago is a D-type asteroid, a group of 46 known bodies, mostly being Jupiter trojans and centaurs such as 10199 Chariklo and 624 Hektor. It is thought that the Martian moon Phobos has a similar composition, and that the Tagish Lake meteorite origins from a D-type asteroid.
It orbits the Sun at a distance of 3.2–3.7 AU once every 6 years and 4 months (2,308 days). Its orbit has an eccentricity of 0.07 and an inclination of 6° with respect to the ecliptic. In 1924, it was first identified as A924 RF at the discovering observatory. The body's observation arc begins at Yerkes Observatory about two months after its official discovery at Simeiz.
In March 1990, a rotational lightcurve of Dubiago was obtained using the Nordic Optical Telescope at the La Palma site on the Canary Islands. Lightcurve analysis gave a rotation period of 14.3 hours with a brightness variation of 0.23 magnitude (U=2). A second lightcurve was obtained in the R-band at the Palomar Transient Factory in October 2013, giving an alternative period solution of 34.8374 hours with an amplitude of 0.21 magnitude (U=2).
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Dubiago measures 63.12 and 75.79 kilometers in diameter, and its surface has an albedo of 0.051 and 0.036, respectively. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS with an absolute magnitude of 9.85.
This minor planet was named in honor of Alexander Dubyago (1903–1959), a renowned astronomer of the Soviet Union. The lunar crater Dubyago is also named in his and his father's honour. Naming was suggested by the Russian Institute of Theoretical Astronomy and citation was published by the MPC before November 1977 (M.P.C. 2740).