169 Zelia

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169 Zelia
Discovered by P. M. Henry, 1876
Main belt
Orbital characteristics[1]
Aphelion 2.668 AU
Perihelion 2.047 AU
2.358 AU
Eccentricity 0.132
3.62 years
Inclination 5.51°
Physical characteristics
13.27 hours
Albedo 0.178 ± 0.035[2]
Spectral type
O (Bus & Binzel)[2]

169 Zelia is a main belt asteroid that was discovered by the brothers Paul Henry and Prosper Henry on September 28, 1876. Credit for this discovery was given to Prosper. It is named after a niece of the astronomer Camille Flammarion.[3] Initial orbital elements for this asteroid were published in 1877 by American astronomer H. A. Howe.[4]

Based upon its spectrum, this body is classified as a rare O-type asteroid in the taxonomic system of Bus & Binzel.[2] Photometric observations of this asteroid during 2009 gave a light curve with a period of 14.537 ± 0.001 hours and a brightness variation of 0.14 ± 0.03 in magnitude.[5]


  1. ^ Yeomans, Donald K., "169 Zelia", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30. 
  2. ^ a b c Mainzer, A.; et al. (January 2012), "NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results", The Astrophysical Journal 745 (1): 1–20, arXiv:1110.4998, Bibcode:2012ApJ...745....7M, doi:10.1088/0004-637X/745/1/7. 
  3. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 28, ISBN 3642297188. 
  4. ^ Howe, H. A. (May 1877), "Elements of (169) Zelia", Astronomische Nachrichten 89: 279, Bibcode:1877AN.....89..279H, doi:10.1002/asna.18770891803. 
  5. ^ Stephens, Robert D.; Pilcher, Frederick (October 2009), "Photometric Observations of 169 Zelia", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 36 (4): 161, Bibcode:2009MPBu...36..161S.