2156 Kate

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2156 Kate
2156Kate (Lightcurve Inversion).png
Lightcurve-based 3D-model of Kate
Discovery [1]
Discovered byS. Belyavsky
Discovery siteSimeiz Obs.
Discovery date23 September 1917
MPC designation(2156) Kate
Named after
Kate Kristensen
(wife of naming astronomer)[2]
A917 SH · 1937 PK
1954 UT2 · 1956 GP
1957 QK · 1969 BE
1970 LK · 1974 RL1
1976 GK1 · 1979 BC
main-belt · (inner)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc99.61 yr (36,384 days)
Aphelion2.6942 AU
Perihelion1.7900 AU
2.2421 AU
3.36 yr (1,226 days)
0° 17m 36.96s / day
Physical characteristics
Dimensions8.131±0.144 km[3][4]
8.61 km (calculated)[5]
5.62 h[6]
5.62215±0.00005 h[7]
5.6228±0.0003 h[a]
5.623±0.005 h[8]
0.20 (assumed)[5]
Tholen = S[1] · A[9] · S[5]
B–V = 0.916[1]
U–B = 0.525[1]
12.69[1][5][3] · 13.23±1.05[9]

2156 Kate, provisional designation A917 SH, is a stony, rare-type asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. The asteroid was discovered on 23 September 1917, by Soviet–Russian astronomer Sergey Belyavsky at Simeiz Observatory on the Crimean peninsula.[10] It was named for Kate Kristensen, wife of astronomer L. K. Kristensen.[2]

Orbit and classification[edit]

Kate orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,226 days). Its orbit has an eccentricity of 0.20 and an inclination of 5° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, the asteroid's observation arc begins with its official discovery observation at Simeiz in 1917.[10]

Physical characteristics[edit]

In the Tholen classification, Kate is a common S-type asteroid.[1] It has also been characterized as a rare A-type asteroid by Pan-STARRS' large photometric survey.[9]

Rotation period[edit]

A large number of rotational lightcurves were obtained from photometric observations. They gave a well-defined rotation period of 5.620 to 5.623 hours with a brightness variation between 0.5 and 0.9 magnitude (U=3/3-).[6][7][8][a]

Diameter and albedo[edit]

According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Kate measures 8.131 kilometers in diameter and its surface has an albedo of 0.189 and 0.2242, respectively,[3][4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.61 kilometers with an absolute magnitude of 12.69.[5]


This minor planet was named after Kate Kristensen, wife of astronomer L. K. Kristensen, who was involved in the body's orbit computation.[2] The official naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5284).[11]


  1. ^ a b Dunckel (2011) web: rotation period 5.6228±0.0003 hours with a brightness amplitude of 0.84 mag. (U=3). Summary figures for (2156) Kate at Collaborative Asteroid Lightcurve Link (CALL)


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 2156 Kate (A917 SH)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 11 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(2156) Kate". Dictionary of Minor Planet Names – (2156) Kate. Springer Berlin Heidelberg. p. 175. doi:10.1007/978-3-540-29925-7_2157. ISBN 978-3-540-00238-3.
  3. ^ 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. Retrieved 1 March 2016.
  4. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 7 December 2016.
  5. ^ a b c d e "LCDB Data for (2156) Kate". Asteroid Lightcurve Database (LCDB). Retrieved 1 March 2016.
  6. ^ a b Binzel, R. P.; Mulholland, J. D. (December 1983). "A photoelectric lightcurve survey of small main belt asteroids". Icarus. 56 (3): 519–533. Bibcode:1983Icar...56..519B. doi:10.1016/0019-1035(83)90170-7. ISSN 0019-1035. Retrieved 1 March 2016.
  7. ^ a b Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy and Astrophysics. 530: 16. arXiv:1104.4114. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved 1 March 2016.
  8. ^ a b Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; Ivanova, V.; Apostolovska, G.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy and Astrophysics. 546: 51. Bibcode:2012A&A...546A..72K. doi:10.1051/0004-6361/201219199. Retrieved 1 March 2016.
  9. ^ a b c 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 1 March 2016.
  10. ^ a b "2156 Kate (A917 SH)". Minor Planet Center. Retrieved 1 March 2016.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 May 2016.

External links[edit]