164 Eva
| Discovery | |
|---|---|
| Discovered by | P. P. Henry |
| Discovery site | Paris |
| Discovery date | July 12, 1876 |
| Designations | |
Designation | 164 |
Named after | Unknown |
| 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 kg[2] |
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
- ^ Yeomans, Donald K., "164 Eva", JPL Small-Body Database, retrieved 2013-03-25.
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ a b Warner, Brian D. (January 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September", The Minor Planet Bulletin, vol. 36, no. 1, pp. 7–13, Bibcode:2009MPBu...36....7W.
- ^ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, vol. 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
- ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer, pp. 28, 1341, ISBN 3642297188.
- ^ Upton, Winslow (July 1877), "Elements of (164) Eva", Astronomische Nachrichten, vol. 90, p. 85, Bibcode:1877AN.....90...85U, doi:10.1002/asna.18770900605.
External links
- 164 Eva at the JPL Small-Body Database
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