1933 Tinchen

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1933 Tinchen
1933Tinchen (Lightcurve Inversion).png
Lightcurve-based 3D-model of Tinchen
Discovery [1]
Discovered byL. Kohoutek
Discovery siteBergedorf Obs.
Discovery date14 January 1972
MPC designation(1933) Tinchen
Named after
Christine Kohoutek
(wife of the discoverer)[2]
1972 AC · 1956 TB
1956 VE · 1962 JF
1962 JS
main-belt · Vesta [3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc60.59 yr (22,131 days)
Aphelion2.6437 AU
Perihelion2.0617 AU
2.3527 AU
3.61 yr (1,318 days)
0° 16m 23.16s / day
Physical characteristics
Dimensions4.51±0.11 km[4]
5.04 km (calculated)[3]
6.454±0.041 km[5]
3.67±0.07 h[6]
3.6703±0.0006 h[7]
3.671±0.005 h[8]
3.672±0.003 h[a]
0.4 (assumed)[3]
12.769±0.003 (R)[7] · 12.88[4] · 12.9[5] · 13.07±0.32[9] · 13.1[1][3]

1933 Tinchen, provisional designation 1972 AC, is a Vestian asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered on 14 January 1972, by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory in Germany, who named it after his wife, Christine Kohoutek.[2][10]

Classification and orbit[edit]

Tinchen orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,318 days). Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic.[1]

The vestoid or V-type asteroid is also a member of the Vesta family. Asteroids with these spectral and orbital characteristics are thought to have all originated from the Rheasilvia crater, a large impact crater on the south-polar surface of 4 Vesta, which is the main-belt's second-most-massive asteroid after 1 Ceres.

Physical characteristics[edit]

Tinchen has a rotation period of 3.671 hours.[6][7][a]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tinchen measures between 4.51 and 6.454 kilometers in diameter and its surface has an albedo between 0.2950 and 0.613.[4][5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for Vestian asteroids of 0.40 and calculates a diameter of 5.04 kilometers with an absolute magnitude of 13.1.[3]


The discoverer named this minor planet after his wife, Christine Kohoutek.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3938).[11]


  1. ^ a b Ryan 2007 (web) figures at LCDB for results of LCDB – 1933 Tinchen


  1. ^ a b c d "JPL Small-Body Database Browser: 1933 Tinchen (1972 AC)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 10 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1933) Tinchen". Dictionary of Minor Planet Names – (1933) Tinchen. Springer Berlin Heidelberg. p. 155. doi:10.1007/978-3-540-29925-7_1934. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (1933) Tinchen". Asteroid Lightcurve Database (LCDB). Retrieved 9 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 9 December 2016.
  5. ^ 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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  6. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1933) Tinchen". Geneva Observatory. Retrieved 9 December 2016.
  7. ^ 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 9 December 2016.
  8. ^ Hasegawa, Sunao; Miyasaka, Seidai; Mito, Hiroyuki; Sarugaku, Yuki; Ozawa, Tomohiko; Kuroda, Daisuke; et al. (June 2014). "Lightcurve survey of V-type asteroids in the inner asteroid belt". Publications of the Astronomical Society of Japan. 66 (3): 5415. arXiv:1311.4653. Bibcode:2014PASJ...66...54H. doi:10.1093/pasj/psu040. Retrieved 9 December 2016.
  9. ^ 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 9 December 2016.
  10. ^ "1933 Tinchen (1972 AC)". Minor Planet Center. Retrieved 9 December 2016.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 December 2016.

External links[edit]