164 Eva

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164 Eva
Discovery
Discovered by P. P. Henry
Discovery site Paris
Discovery date July 12, 1876
Designations
MPC designation 164
Minor planet category Main belt
Orbital characteristics[1]
Epoch November 4, 2013
Aphelion 3.5412 AU (529.76 Gm)
Perihelion 1.7262 AU (258.24 Gm)
2.6337 AU (394.00 Gm)
Eccentricity 0.3446
1561.1769 d
4.27 a
349.3173°
Inclination 24.4700°
77.1008°
283.5634°
Physical characteristics
Dimensions 101.77 ± 3.61[2] km
Mass (9.29 ± 7.76) × 1017[2] kg
Mean density
1.68 ± 1.41[2] g/cm3
2.249 cm/s (mean)
4.857 cm/s (mean)
13.672[3] h
Albedo 0.0447
Temperature 170 K (mean)
Spectral type
C
8.84[4]

164 Eva is a main-belt asteroid that was discovered by the French brothers Paul Henry and Prosper Henry on July 12, 1876 in Paris. The reason the name Eva was chosen remains unknown.[5] The orbital elements for 164 Eva were published in 1877 by American astronomer Winslow Upton.[6] It is categorized as a C-type asteroid and is probably composed of primitive carbonaceous chondritic materials.

Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado during 2008 gave a light curve with a period of 13.672 ± 0.003 hours and a small brightness variation of 0.04 ± 0.01 in magnitude. This is consistent with a previous study reported in 1982 that listed a period estimate of 13.66 hours.[3]

In 2000 Eva was reported occulting a dim star.

References[edit]

  1. ^ Yeomans, Donald K., 164 Eva, JPL Small-Body Database, retrieved 2013-03-25. 
  2. ^ a b c Carry, B. (December 2012), Density of asteroids, Planetary and Space Science 73: 98-118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b Warner, Brian D. (January 2009), Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September, Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 36 (1): 7–13, Bibcode:2009MPBu...36....7W. 
  4. ^ Warner, Brian D. (December 2007), Initial Results of a Dedicated H-G Project, Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 34: 113–119, Bibcode:2007MPBu...34..113W. 
  5. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer, p. 28, 1341, ISBN 3642297188. 
  6. ^ Upton, Winslow (July 1877), Elements of (164) Eva, Astronomische Nachrichten 90: 85, Bibcode:1877AN.....90...85U, doi:10.1002/asna.18770900605. 

External links[edit]