164 Eva
| Discovery | |
|---|---|
| Discovered by | P. P. Henry |
| Discovery site | Paris |
| Discovery date | 12 July 1876 |
| Designations | |
| MPC designation | 164 |
Named after | Unknown |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 118.93 yr (43438 d) |
| Aphelion | 3.5444 AU (530.23 Gm) |
| Perihelion | 1.7231 AU (257.77 Gm) |
| 2.6338 AU (394.01 Gm) | |
| Eccentricity | 0.34577 |
| 4.27 yr (1561.2 d) | |
| 219.5472° | |
| 0° 13m 50.128s / day | |
| Inclination | 24.4564° |
| 76.8519° | |
| 283.9561° | |
| Earth MOID | 0.882286 AU (131.9881 Gm) |
| Jupiter MOID | 2.44116 AU (365.192 Gm) |
| Jupiter Tisserand parameter | 3.191 |
| Physical characteristics | |
| Dimensions |
104.87±1.9 km[1] 101.77 ± 3.61 km[2] |
| Mass | (9.29 ± 7.76) × 1017 kg[2] |
Mean density | 1.68 ± 1.41 g/cm3[2] |
Equatorial surface gravity | 2.249 cm/s (mean) |
Equatorial escape velocity | 4.857 cm/s (mean) |
|
13.66 h (0.569 d)[1] 13.672 h[3] | |
| 0.0447±0.002 | |
| Temperature | 170 K (mean) |
| C | |
| 8.89,[1] 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
- 1 2 3 4 Yeomans, Donald K., "164 Eva", JPL Small-Body Database, retrieved 12 May 2016.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - 1 2 Warner, Brian D. (January 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September", The Minor Planet Bulletin, 36 (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, 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, 90, p. 85, Bibcode:1877AN.....90...85U, doi:10.1002/asna.18770900605.
External links
- 164 Eva at the JPL Small-Body Database
