2127 Tanya

2127 Tanya, provisional designation 1971 KB1, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 29 May 1971, by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[11] It was named in memory of Tanya Savicheva, a Russian child diarist during World War II.[2]

2127 Tanya
Discovery [1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date29 May 1971
Designations
(2127) Tanya
Named after
Tanya Savicheva
(Russian child diarist) [2]
1971 KB1 · 1953 GH1
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc64.14 yr (23,428 days)
Aphelion3.3125 AU
Perihelion3.1076 AU
3.2100 AU
Eccentricity0.0319
5.75 yr (2,101 days)
343.14°
0° 10m 17.04s / day
Inclination13.094°
106.39°
185.54°
Physical characteristics
Dimensions30.18 km (calculated)[3]
37.736±0.197 km[4]
40.111±0.397 km[5]
41.19±1.05 km[6]
41.43±9.46 km[7]
43.89±16.43 km[8]
7.864±0.0211 h[9]
0.03±0.06[8]
0.04±0.03[7]
0.0437±0.0049[5]
0.048±0.007[4]
0.055±0.003[6]
0.057 (assumed)[3]
C [3][10]
10.70[6] · 10.70±0.83[10] · 10.879±0.002 (R)[9] · 10.90[8] · 11.0[5] · 11.1[1] · 11.15[7] · 11.33[3]

    Orbit

    Tanya is a carbonaceous C-type asteroid, that orbits the Sun in the outer main-belt at a distance of 3.1–3.3 AU once every 5 years and 9 months (2,101 days). Its orbit has an eccentricity of 0.03 and an inclination of 13° with respect to the ecliptic.[1] It was first identified as 1953 GH1 at Goethe Link Observatory in 1953, extending the body's observation arc by 18 years prior to its official discovery at Nauchnij.[11]

    Lightcurve

    In October 2013, a rotational lightcurve of Tanya was obtained from photometric observations at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 7.8640 hours with a brightness variation of 0.18 magnitude (U=2).[9]

    Diameter and albedo

    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, Tanya measures between 37.736 and 43.89 kilometers in diameter, and its surface has a low albedo between 0.03 and 0.055.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a much smaller diameter of 30.18 kilometers based on an absolute magnitude of 11.33.[3]

    Naming

    This minor planet was named by the discover for the memory of the young Russian girl Tanya Savicheva (1930–1944), who died after the Siege of Leningrad (1941–1944) on the Eastern Front during World War II. She wrote a well-known diary, describing the death of her parents and other relatives.[2] The approved naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5283).[12]

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    References
    1. "JPL Small-Body Database Browser: 2127 Tanya (1971 KB1)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 3 July 2017.
    2. Schmadel, Lutz D. (2007). "(2127) Tanya". Dictionary of Minor Planet Names – (2127) Tanya. Springer Berlin Heidelberg. p. 172. doi:10.1007/978-3-540-29925-7_2128. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (2127) Tanya". Asteroid Lightcurve Database (LCDB). Retrieved 27 March 2017.
    4. 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:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 27 March 2017.
    5. 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.
    6. 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. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    7. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 27 March 2017.
    8. 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. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 27 March 2017.
    9. 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 27 March 2017.
    10. 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. Retrieved 27 March 2017.
    11. "2127 Tanya (1971 KB1)". Minor Planet Center. Retrieved 27 March 2017.
    12. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 March 2017.

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