1788 Kiess

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1788 Kiess
Discovery [1]
Discovered by Indiana University
(Indiana Asteroid Program)
Discovery site Goethe Link Obs.
Discovery date 25 July 1952
MPC designation (1788) Kiess
Named after
Carl C. Kiess (astronomer)[2]
1952 OZ · 1935 NE
1964 WP
main-belt · Themis[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 64.78 yr (23,660 days)
Aphelion 3.5961 AU
Perihelion 2.6381 AU
3.1171 AU
Eccentricity 0.1537
5.50 yr (2,010 days)
0° 10m 44.76s / day
Inclination 0.6816°
Physical characteristics
Dimensions 19.59 km (calculated)[3]
20.993±0.271 km[4][5]
11.0335±0.0071 h[6]
12±2 h[7]
0.08 (assumed)[3]
11.801±0.002 (R)[6] · 11.9[1][3][4] · 11.93±0.26[8]

1788 Kiess, provisional designation 1952 OZ, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 25 July 1952, by the Indiana Asteroid Program at the U.S. Goethe Link Observatory near Brooklyn, Indiana, United States, and later named after astronomer Carl Kiess.[2][9]

Orbit and classification[edit]

The C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. The asteroid orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,010 days). Its orbit has an eccentricity of 0.15 and an inclination of 1° with respect to the ecliptic.[1] Kiess was first identified as 1935 NE at Algiers Observatory in 1935. Its observation arc begins with its official discovery observation.[9]

Physical characteristics[edit]

Rotation period[edit]

In 2010, two rotational lightcurves were obtained from photometric observations at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 12 and 11.0335 hours with a brightness variation of 0.25 and 0.30 magnitude, respectively (U=2-/2).[7][6]

Diameter and albedo[edit]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Kiess measures 20.99 kilometers in diameter, and its surface has an albedo of 0.07.[4] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 19.59 kilometers with an absolute magnitude of 11.9.[3]


This minor planet was named for American astronomer Carl C. Kiess (1887–1967), a graduate of Indiana University, who made distinguished contributions both in astronomy and spectroscopy at the U.S. National Bureau of Standards where he worked for over 40 years.[2]

Kiess was a member of several eclipse expeditions. The lunar crater Kiess was also named in his honour. The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3508).[10]


  1. ^ a b c d "JPL Small-Body Database Browser: 1788 Kiess (1952 OZ)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1788) Kiess. Springer Berlin Heidelberg. p. 143. ISBN 978-3-540-00238-3. Retrieved 19 December 2016. 
  3. ^ a b c d e f "LCDB Data for (1788) Kiess". Asteroid Lightcurve Database (LCDB). Retrieved 19 December 2016. 
  4. ^ 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" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 19 December 2016. 
  5. ^ a b 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 19 December 2016. 
  6. ^ 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 19 December 2016. 
  7. ^ a b Polishook, D.; Ofek, E. O.; Waszczak, A.; Kulkarni, S. R.; Gal-Yam, A.; Aharonson, O.; et al. (April 2012). "Asteroid rotation periods from the Palomar Transient Factory survey". Monthly Notices of the Royal Astronomical Society. 421 (3): 2094–2108. arXiv:1201.1930Freely accessible. Bibcode:2012MNRAS.421.2094P. doi:10.1111/j.1365-2966.2012.20462.x. Retrieved 19 December 2016. 
  8. ^ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 19 December 2016. 
  9. ^ a b "1788 Kiess (1952 OZ)". Minor Planet Center. Retrieved 19 December 2016. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 December 2016. 

External links[edit]