Astronomy:1671 Chaika

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1671 Chaika
Discovery[1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date3 October 1934
Designations
(1671) Chaika
Named afterValentina Tereshkova[2]
(Soviet cosmonaut)
1934 TD · 1930 WE
1952 BX · 1955 XA
1963 SO · 1971 RC
A907 GM
Minor planet categorymain-belt[1][3] · (middle)
background[4] · Astraea[5]
Orbital characteristics[3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc87.90 yr (32,107 d)
|{{{apsis}}}|helion}}3.2516 AU
|{{{apsis}}}|helion}}1.9223 AU
2.5870 AU
Eccentricity0.2569
Orbital period4.16 yr (1,520 d)
Mean anomaly80.231°
Mean motion0° 14m 12.84s / day
Inclination3.9660°
Longitude of ascending node177.17°
250.27°
Physical characteristics
Mean diameter7.478±0.728 km[6]
9.37±0.46 km[7]
10.222±0.048 km[8]
13.29±1.71 km[9]
Rotation period3.7718±0.0002 h[10]
Geometric albedo0.120[6]
0.145[9]
0.2463[8]
0.291[7]
S (assumed)[11]
Absolute magnitude (H)12.1[1][3][6][7][8][9][11]


1671 Chaika, provisional designation 1934 TD, is a background asteroid from the Astraea region in the central asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 3 October 1934, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The assumed S-type asteroid has a rotation period of 3.8 hours.[11] It was named for Soviet cosmonaut Valentina Tereshkova.[2]

Orbit and classification

According to a HCM-analysis by Nesvorný, Chaika is a non-family asteroid from the main belt's background population,[4] while for Milani and Knežević, it is a member of the larger Astraea family, named after 5 Astraea.[5] The Astraea family is not recognized by Nesvorný as a collisional asteroid family, who rather considers it an artifact in the model due to a resonant alignment.[12]

It orbits the Sun in the central asteroid belt at a distance of 1.9–3.3 AU once every 4 years and 2 months (1,520 days; semi-major axis of 2.59 AU). Its orbit has an eccentricity of 0.26 and an inclination of 4° with respect to the ecliptic.[3] The asteroid was first observed at the Lowell Observatory in April 1907. The body's observation arc begins at the Tokyo Observatory (389) in November 1930, almost 4 years prior to its official discovery observation at Simeiz–Crimea.[1]

Naming

This minor planet was named in honor of Soviet cosmonaut Valentina "Chaika" Tereshkova (born 1937). Tereshkova received the call sign "Chaika" – the Russian word for seagull – as she was the first woman to fly in space.[2] The asteroid's name was proposed by the Institute of Theoretical Astronomy (ITA) in St Petersburg. The official naming citation was published by the Minor Planet Center on 1 June 1967 (M.P.C. 2740).[13]

Physical characteristics

Chaika is an assumed, stony S-type asteroid.[11]

Rotation period

In November 2005, a rotational lightcurve of Chaika was obtained from photometric observations by Italian astronomers Roberto Crippa, Federico Manzini and Josep Coloma. Lightcurve analysis gave a rotation period of 3.7718±0.0002 hours with a brightness variation of 0.18 magnitude ({{{1}}}).[10] John Menke in collaboration with Walter Cooney and David Higgins determined a concurring period of 3.774±0.003 hours with an amplitude of 0.20 magnitude ({{{1}}}).[14]

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, Chaika measures between 7.5 and 13.3 kilometers in diameter and its surface has an albedo between 0.12 and 0.29.[6][7][8][9] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 11.30 kilometers based on an absolute magnitude of 12.1.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "1671 Chaika (1934 TD)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1671. Retrieved 10 December 2018. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1671) Chaika". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 133. doi:10.1007/978-3-540-29925-7_1672. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 "JPL Small-Body Database Browser: 1671 Chaika (1934 TD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001671. Retrieved 10 December 2018. 
  4. ↑ 4.0 4.1 "Asteroid 1671 Chaika". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1671+Chaika. Retrieved 10 December 2018. 
  5. ↑ 5.0 5.1 "Asteroid (1671) Chaika – Proper elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?n=1671&pc=1.1.6. Retrieved 10 December 2018. 
  6. ↑ 6.0 6.1 6.2 6.3 Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R. et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System: EAR-A-COMPIL-5-NEOWISEDIAM-V1.0. Bibcode: 2016PDSS..247.....M. https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab. Retrieved 10 December 2018. 
  7. ↑ 7.0 7.1 7.2 7.3 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. 
  8. ↑ 8.0 8.1 8.2 8.3 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.  (catalog)
  9. ↑ 9.0 9.1 9.2 9.3 Hasegawa, Sunao; Müller, Thomas G.; Kuroda, Daisuke; Takita, Satoshi; Usui, Fumihiko (April 2013). "The Asteroid Catalog Using AKARI IRC Slow-Scan Observations". Publications of the Astronomical Society of Japan 65 (2): 11. doi:10.1093/pasj/65.2.34. Bibcode: 2013PASJ...65...34H. 
  10. ↑ 10.0 10.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1671) Chaika". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001671. Retrieved 10 December 2018. 
  11. ↑ 11.0 11.1 11.2 11.3 11.4 "LCDB Data for (1671) Chaika". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1671%7CChaika. Retrieved 10 December 2018. 
  12. ↑ 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 9780816532131. Bibcode: 2015aste.book..297N. 
  13. ↑ 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. https://cds.cern.ch/record/1339661. 
  14. ↑ Menke, John; Cooney, Walt; Gross, John; Terrell, Dirk; Higgins, David (October 2008). "Asteroid Lightcurve Analysis at Menke Observatory". The Minor Planet Bulletin 35 (4): 155–160. ISSN 1052-8091. Bibcode: 2008MPBu...35..155M. 

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