1909 Alekhin

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1909 Alekhin
Discovery
Synodic rotation period
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, and named after chess grandmaster and World Chess Champion Alexander Alekhine.[2][13]

Orbit and classification

The S-type asteroid orbits the Sun in the inner main-belt 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]

Physical characteristics

Slow rotator

Alekhin is a

U=2/3).[9][10]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite

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 with an absolute magnitude of 12.8.[3]

Occultation

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]

Naming

This minor planet was named in honour of Russian-born

M.P.C. 3937).[15]

References

  1. ^ a b c d "JPL Small-Body Database Browser: 1909 Alekhin (1972 RW2)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 9 June 2017.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b c d e f "LCDB Data for (1909) Alekhin". Asteroid Lightcurve Database (LCDB). Retrieved 10 December 2016.
  4. ^
    S2CID 46350317
    . Retrieved 10 December 2016.
  5. ^
    Bibcode:2004PDSS...12.....T
    . Retrieved 17 October 2019.
  6. ^
    doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153
    )
  7. ^
    S2CID 119293330
    . Retrieved 10 December 2016.
  8. ^
    S2CID 118700974
    .
  9. ^
    S2CID 8342929
    . Retrieved 10 December 2016.
  10. ^
    ISSN 1052-8091
    . Retrieved 10 December 2016.
  11. S2CID 53493339
    . Retrieved 10 December 2016.
  12. ISSN 1052-8091
    . Retrieved 10 December 2016.
  13. ^ "1909 Alekhin (1972 RW2)". Minor Planet Center. Retrieved 10 December 2016.
  14. ^ Preston, Steve (14 May 2007). "IOTA/IOTA-ES occultation update for (1909) Alekhin / TYC 0264-00685-1 event on 2008 Nov 30, 06:05 UT". asteroidocculatation.com. Retrieved 9 March 2008. [dead link]
  15. ISBN 978-3-642-01964-7
    .

External links
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