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3406 Omsk, provisional designation 1969 DA, is a background asteroid from the central regions of the asteroid belt, approximately 15 kilometers (9.3 miles) in diameter. It was discovered on 21 February 1969, by Soviet astronomer Bella Burnasheva at the Crimean Astrophysical Observatory on the Crimean peninsula in Nauchnij. The possibly metallic M/X-type asteroid has a rotation period of 7.3 hours. It was named for the Russian city of Omsk.

Orbit and classification

Omsk is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.4–3.2 AU once every 4 years and 8 months (1,708 days; semi-major axis of 2.8 AU). Its orbit has an eccentricity of 0.13 and an inclination of 8° with respect to the ecliptic.

The asteroid was first observed as 1951 KA₁ at McDonald Observatory in May 1951. The body's observation arc begins with its official discovery observation at Nauchnij in February 1969.

Physical characteristics

In the SMASS classification, Omsk is an X-type asteroid. It has also been characterized as a metallic M-type and carbonaceous C-type by the Wide-field Infrared Survey Explorer (WISE) and Pan-STARRS, respectively.

Rotation period

In May 2007, a rotational lightcurve of Omsk was obtained from photometric observations at the Mount Tarana Observatory (431) in Bathurst, Australia. Lightcurve analysis gave a well-defined rotation period of 7.275 hours with a brightness amplitude of 0.28 magnitude (U=3).

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Omsk measures between 13.43 and 16.59 kilometers in diameter and its surface has an albedo between 0.1569 and 0.2476.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1619 and a diameter of 14.42 kilometers based on an absolute magnitude of 11.8.

Naming

This minor planet was named after the Siberian city of Omsk, the discoverer's birthplace and the administrative center of Omsk Oblast, Russia. The official naming citation was published by the Minor Planet Center on 18 February 1992 (M.P.C. 19693).

References

1. ^ "3406 Omsk (1969 DA)". Minor Planet Center. Retrieved 14 May 2018.
2. ^ "JPL Small-Body Database Browser: 3406 Omsk (1969 DA)" (2017-10-30 last obs.). Jet Propulsion Laboratory. Retrieved 14 May 2018.
3. ^ "Asteroid 3406 Omsk – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
4. ^ Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID 46350317.
5. ^ "LCDB Data for (3406) Omsk". Asteroid Lightcurve Database (LCDB). Retrieved 14 May 2018.
6. ^ Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
7. ^ Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID 118745497.
8. ^ Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010. (catalog)
9. ^ 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. (online, AcuA catalog p. 153)
10. ^ Bembrick, Collin; Crawford, Greg (December 2007). "The Rotation Period of 3406 Omsk". The Minor Planet Bulletin. 34 (4): 128–129. Bibcode:2007MPBu...34..128B. ISSN 1052-8091.
11. ^ 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. S2CID 53493339.
12. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 14 May 2018.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 3406 Omsk at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3406 Omsk at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Bella A. Burnasheva
• Named minor planets
• X-type asteroids (SMASS)
• Astronomical objects discovered in 1969