1167 Dubiago

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, and named after astronomer Alexander Dubyago.[9][2]

1167 Dubiago
Discovery [1]
Discovered byE. F. Skvortsov
Discovery siteSimeiz Obs.
Discovery date3 August 1930
(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 arc86.71 yr (31,671 days)
Aphelion3.6517 AU
Perihelion3.1772 AU
3.4145 AU
6.31 yr (2,305 days)
0° 9m 22.32s / day
Physical characteristics
Dimensions63.12±5.6 km (IRAS:17)[4]
75.79±0.90 km[5]
14.3 h[6]
34.8374±0.0990 h[7]
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]

Classification and orbitEdit

Dubiago orbits the Sun in the outer main-belt at a distance of 3.2–3.7 AU once every 6 years and 4 months (2,305 days). Its orbit has an eccentricity of 0.07 and an inclination of 6° with respect to the ecliptic.[1] 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.[9]

Physical characteristicsEdit

In the Tholen classification, 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.[10] It is thought that the Martian moon Phobos has a similar composition, and that the Tagish Lake meteorite origins from a D-type asteroid.


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).[6] 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).[7]

Diameter and albedoEdit

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.[4][5] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS with an absolute magnitude of 9.85.[3]


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.[2] The approved naming was suggested by the Russian Institute of Theoretical Astronomy (ITA) and the official naming citation was published by the Minor Planet Center on 1 June 1967 (M.P.C. 2740).[11]


  1. ^ a b c d e f g "JPL Small-Body Database Browser: 1167 Dubiago (1930 PB)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 26 July 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1167) Dubiago". Dictionary of Minor Planet Names – (1167) Dubiago. Springer Berlin Heidelberg. p. 98. doi:10.1007/978-3-540-29925-7_1168. ISBN 978-3-540-00238-3.
  3. ^ a b c d "LCDB Data for (1167) Dubiago". Asteroid Lightcurve Database (LCDB). Retrieved 1 February 2017.
  4. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 17 October 2019.
  5. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
  6. ^ a b Dahlgren, M.; Lagerkvist, C.-I.; Fitzsimmons, A.; Williams, I. P. (May 1991). "Differential CCD photometry of Dubiago, Chiron and Hektor". Monthly Notices of the Royal Astronomical Society. 250: 115–118. Bibcode:1991MNRAS.250..115D. doi:10.1093/mnras/250.1.115. ISSN 0035-8711. Retrieved 1 February 2017.
  7. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 1 February 2017.
  8. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 February 2017.
  9. ^ a b "1167 Dubiago (1930 PB)". Minor Planet Center. Retrieved 1 February 2017.
  10. ^ "JPL Small-Body Database Search: list of D-type minor planets (Tholen/SMASSII)". Jet Propulsion Laboratory. Retrieved 5 November 2015.
  11. ^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External linksEdit