astro.wikisort.org - Asteroid
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.[6] The orbital elements for 164 Eva were published in 1877 by American astronomer Winslow Upton.[7] It is categorized as a C-type asteroid and is probably composed of primitive carbonaceous chondritic materials.
| Discovery | |
|---|---|
| Discovered by | P. P. Henry |
| Discovery site | Paris |
| Discovery date | 12 July 1876 |
| Designations | |
MPC designation | (164) Eva |
| Pronunciation | /ˈiːvə/[1] |
Named after | Unknown |
Minor planet category | Main belt |
| Orbital characteristics[2] | |
| 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 | 1.7188 AU (257.13 Gm) |
Semi-major axis | 2.6338 AU (394.01 Gm) |
| Eccentricity | 0.34577 |
Orbital period (sidereal) | 4.27 yr (1561.2 d) |
Mean anomaly | 219.5472° |
Mean motion | 0° 13m 50.128s / day |
| Inclination | 24.4564° |
Longitude of ascending node | 76.8519° |
Argument of perihelion | 283.9561° |
| Earth MOID | 0.882286 AU (131.9881 Gm) |
| Jupiter MOID | 2.44116 AU (365.192 Gm) |
| TJupiter | 3.191 |
| Physical characteristics | |
| Dimensions | 104.87±1.9 km[2] 101.77 ± 3.61 km[3] |
| Mass | (9.29 ± 7.76) × 1017 kg[3] |
Mean density | 1.68 ± 1.41 g/cm3[3] |
Equatorial surface gravity | 2.249 cm/s (mean) |
Equatorial escape velocity | 4.857 cm/s (mean) |
Synodic rotation period | 13.66 h (0.569 d)[2] 13.672 h[4] |
Geometric albedo | 0.0447±0.002 |
| Temperature | 170 K (mean) |
Spectral type | C |
Absolute magnitude (H) | 8.89,[2] 8.84[5] |
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.[4]
Between 2000 and 2021, 164 Eva has been observed to occult fourteen stars.
With a perihelion of 1.718 AU 164 Eva is the closest asteroid over 100 kilometers to approach the orbit of Mars. Its closest approach is about 0.05 AU or about 19.5 lunar distances.[8]
References
- "Eva". Dictionary.com Unabridged (Online). n.d.
- Yeomans, Donald K., "164 Eva", JPL Small-Body Database, archived from the original on 4 March 2019, retrieved 12 May 2016.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Warner, Brian D. (January 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September", The Minor Planet Bulletin, 36 (1): 7–13, Bibcode:2009MPBu...36....7W.
- Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34 (4): 113–119, Bibcode:2007MPBu...34..113W.
- Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer, pp. 28, 1341, ISBN 978-3642297182.
- Upton, Winslow (July 1877), "Elements of (164) Eva", Astronomische Nachrichten, 90 (6): 85–86, Bibcode:1877AN.....90...85U, doi:10.1002/asna.18770900605.
- NASA.gov
External links
- Lightcurve plot of 164 Eva, Palmer Divide Observatory, B. D. Warner (2008)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 164 Eva at AstDyS-2, Asteroids—Dynamic Site
- 164 Eva at the JPL Small-Body Database
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На других языках
[de] (164) Eva
(164) Eva ist ein Asteroid des Asteroiden-Hauptgürtels, der am 12. Juli 1876 von Paul Pierre Henry entdeckt wurde.- [en] 164 Eva
[es] (164) Eva
(164) Eva es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Paul Pierre Henry el 12 de julio de 1876 desde el observatorio de París, Francia. Se desconoce la razón del nombre.[2][ru] (164) Ева
(164) Ева (лат. Eva) — крупный астероид главного пояса, с очень низким альбедо поверхности, которая состоит из простейших углеродно-хондритных пород, характерных для астероидов данного класса. Он был открыт 12 июля 1876 года французскими астрономами братьями Полем и Проспером Анри и назван в честь женщины в авраамических религиях Евы.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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