Astronomy:4944 Kozlovskij

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Short description: Asteroid
4944 Kozlovskij
Discovery [1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date2 September 1987
Designations
(4944) Kozlovskij
Named afterIvan Kozlovsky [2]
(Russian opera singer)
1987 RP3 · 1978 VK13
1985 DP2 · 1991 NX7
Minor planet categorymain-belt [1][3] · (middle)
Witt [4]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc65.41 yr (23,890 d)
|{{{apsis}}}|helion}}2.9170 AU
|{{{apsis}}}|helion}}2.5733 AU
2.7451 AU
Eccentricity0.0626
Orbital period4.55 yr (1,661 d)
Mean anomaly252.23°
Mean motion0° 13m 0.12s / day
Inclination4.4903°
Longitude of ascending node279.41°
84.781°
Physical characteristics
Dimensions9.25±1.11 km[5]
9.89±2.71 km[6]
9.91 km (calculated)[7]
10.85±2.35 km[8]
11.125±0.083 km[9][10]
Rotation period3.573±0.0006 h[11]
Geometric albedo0.057 (assumed)[7]
0.061±0.006[9][10]
0.086±0.032[8]
0.09±0.09[6]
0.157±0.038[5]
SMASS = Cb [3] · C [7]
Absolute magnitude (H)12.80[5] · 13.1[8][9] · 13.20[6] · 13.297±0.003 (R)[11] · 13.3[3] · 13.42±0.25[12] · 13.75[7]


4944 Kozlovskij, provisional designation 1987 RP3, is a carbonaceous Witt asteroid from the central regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 2 September 1987, by Soviet astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean Peninsula.[1] The asteroid was named for Russian opera singer Ivan Kozlovsky.[2]

Classification

Kozlovskij is a member of the Witt family (535),[4] a large family of (predominantly) stony asteroids with more than 1,600 known members.[13] It orbits the Sun in the central main-belt at a distance of 2.6–2.9 AU once every 4 years and 7 months (1,661 days; semi-major axis of 2.75 AU). Its orbit has an eccentricity of 0.06 and an inclination of 4° with respect to the ecliptic.[3] The asteroid's observation arc begins 36 years prior to its official discovery observation, with a precovery taken at Palomar Observatory in December 1951.[1]

Physical characteristics

In the SMASS classification, Kozlovskij is a Cb-type asteroid, an intermediary between the carbonaceous C-type and the somewhat brighter B-type asteroids.[3]

Lightcurves

In October 2010, a rotational lightcurve of Kozlovskij was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.573 hours with a brightness amplitude of 0.46 magnitude ({{{1}}}).[11]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Kozlovskij measures 9.25 and 9.89 kilometers in diameter and its surface has an albedo of 0.157 and 0.09, respectively.[5][6] Preliminary WISE results gave a larger diameter of 10.85 and 11.125 kilometers with lower albedo of 0.086 and 0.061, respectively.[8][9][10]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 9.91 kilometers based on an absolute magnitude of 13.75.[7]

Naming

This minor planet was named after Russian opera singer Ivan Kozlovsky (1900–1993), who was a rare lyric tenor and a popular singer in the former Soviet Union.[2] The approved naming citation was published by the Minor Planet Center on 1 September 1993 (M.P.C. 22504).[14]

References

  1. ↑ 1.0 1.1 1.2 1.3 "4944 Kozlovskij (1987 RP3)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4944. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(4944) Kozlovskij". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. pp. 425–426. doi:10.1007/978-3-540-29925-7_4826. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "JPL Small-Body Database Browser: 4944 Kozlovskij (1987 RP3)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004944. 
  4. ↑ 4.0 4.1 "Asteroid 4944 Kozlovskij – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4944+Kozlovskij#Asteroid%204944%20KozlovskijEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. 
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  6. ↑ 6.0 6.1 6.2 6.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 "LCDB Data for (4944) Kozlovskij". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4944%7CKozlovskij. 
  8. ↑ 8.0 8.1 8.2 8.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 1 July 2017. 
  9. ↑ 9.0 9.1 9.2 9.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  10. ↑ 10.0 10.1 10.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 1 July 2017. 
  11. ↑ 11.0 11.1 11.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. 
  12. ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. 
  13. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 978-0-8165-3213-1. Bibcode: 2015aste.book..297N. 
  14. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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