1909 Alekhin

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1909 Alekhin
Discovery [1]
Discovered by L. Zhuravleva
Discovery site Crimean Astrophysical Obs.
Discovery date 4 September 1972
Designations
MPC designation (1909) Alekhin
Named after
Alexander Alekhine
(chess grandmaster)[2]
1972 RW2 · 1926 GU
1930 KF · 1930 KM
1934 NZ · 1934 OC
1941 FJ · 1960 FD
1969 UU · 1971 DL
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 90.08 yr (32,903 days)
Aphelion 2.9698 AU
Perihelion 1.8757 AU
2.4228 AU
Eccentricity 0.2258
3.77 yr (1,377 days)
1.6082°
0° 15m 41.04s / day
Inclination 1.7955°
227.45°
5.6329°
Physical characteristics
Dimensions 15.45±9.22 km[4]
17.33 km (derived)[3]
17.42±1.5 km (IRAS:15)[5]
18.59±0.37 km[6]
18.681±0.043[7]
18.847±0.129 km[8]
148.2252±0.6228 h[9]
148.6±0.2 h[10]
0.0446 (derived)[3]
0.0460±0.0018[8]
0.060±0.004[7]
0.062±0.003[6]
0.067±0.083[4]
0.0700±0.014 (IRAS:15)[5]
S[3]
12.30[6][8] · 12.44±0.32[11] · 12.60[4] · 12.646±0.003 (R)[9] · 12.8[1][3] · 12.9[12] · 12.91±0.07[10]

1909 Alekhin, provisional designation 1972 RW2, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 4 September 1972, by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula.[13]

The S-type asteroid orbits the Sun at a distance of 1.9–3.0 AU once every 3 years and 9 months (1,377 days). Its orbit has an eccentricity of 0.23 and an inclination of 2° with respect to the ecliptic.[1]

In March 2009 and September 2010, two rotational light-curves for Alekhin were obtained from photometric observations made by the Palomar Transient Factory and by astronomer Roger Dymock, respectively. The light-curves gave a rotation period of 148 hours with a brightness variation of 0.42–0.45 magnitude (U=2/3).[9][10] Alekhin is a slow rotator.

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alekhin measures between 15.5 and 18.8 kilometers in diameter and its surface has an albedo of 0.046 to 0.070.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.045 and a diameter of 17.3 kilometers based on an absolute magnitude of 12.8.[3]

Alekhin is scheduled to occlude a 9.1 magnitude star in the Leo constellation on 30 November 2008, dimming the magnitude of both heavenly bodies for a maximum duration of 0.6 seconds. Astronomers had, as of March 2008, not predicted an optimal trajectory for the event.[14] Lyudmila Zhuravleva is ranked number 43 in Harvard's ranking of those who discovered minor planets. She discovered 200 minor planets, thirteen of which were co-discoveries, between 1972 and 1992.[15]

The minor planet was named in honour of Russian-born Alexander Alekhine (1892–1946), chess grandmaster, considered one of the greatest chess players ever.[2] Naming citation was published before November 1977 (M.P.C. 3937).[16]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1909 Alekhin (1972 RW2)" (2016-05-14 last obs.). Jet Propulsion Laboratory. Retrieved 10 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1909) Alekhin. Springer Berlin Heidelberg. p. 153. ISBN 978-3-540-00238-3. Retrieved 10 December 2016. 
  3. ^ a b c d e f "LCDB Data for (1909) Alekhin". Asteroid Lightcurve Database (LCDB). Retrieved 10 December 2016. 
  4. ^ a b c d 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 10 December 2016. 
  5. ^ a b c Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 8 December 2016. 
  6. ^ 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 10 December 2016. 
  7. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 10 December 2016. 
  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 10 December 2016. 
  9. ^ 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 10 December 2016. 
  10. ^ a b c Dymock, Roger (October 2009). "Lightcurve and Absolute Magnitude of 1909 Alekhin". The Minor Planet Bulletin. 36 (4): 182–183. Bibcode:2009MPBu...36..182D. ISSN 1052-8091. Retrieved 10 December 2016. 
  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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 10 December 2016. 
  12. ^ Faure, Gerard; Garrett, Lawrence (October 2009). "Suggested Revised H Values of Selected Asteroids: Report Number 4". The Minor Planet Bulletin. 36 (4): 140–143. Bibcode:2009MPBu...36..140F. ISSN 1052-8091. Retrieved 10 December 2016. 
  13. ^ "1909 Alekhin (1972 RW2)". Minor Planet Center. Retrieved 10 December 2016. 
  14. ^ Preston, Steve (2007-05-14). "IOTA/IOTA-ES occultation update for (1909) Alekhin / TYC 0264-00685-1 event on 2008 Nov 30, 06:05 UT". asteroidocculatation.com. Retrieved 2008-03-09. [dead link]
  15. ^ "Minor Planet Discoverers (by number)". Minor Planet Center. 20 June 2016. Retrieved 10 December 2016. 
  16. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 December 2016. 

External links[edit]