641 Agnes
| Discovery [1] | |
|---|---|
| Discovered by | M. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 8 September 1907 |
| Designations | |
| MPC designation | 641 Agnes |
Named after | unknown[2] |
| 1907 ZX · 1952 FD1 | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.90 yr (39,411 days) |
| Aphelion | 2.5053 AU |
| Perihelion | 1.9338 AU |
| 2.2195 AU | |
| Eccentricity | 0.1287 |
| 3.31 yr (1,208 days) | |
| 156.84° | |
| Inclination | 1.7120° |
| 41.021° | |
| 17.808° | |
| Physical characteristics | |
| Dimensions |
9.24±0.64 km[4] 9.45±0.17 km[5] 9±2 km[6] 8.81 km (calculated)[3] |
|
178.0±0.1 h[6] 8.9 h[7] | |
|
0.299±0.044[4] 0.217±0.043[5] 0.20±0.07[6] | |
| S [3] | |
| 12.4[1] | |
|
| |
641 Agnes, provisional designation 1907 ZX, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, about 9 kilometers in diameter. It was discovered on 8 September 1907, by German astronomer Max Wolf at Heidelberg Observatory in southern Germany.[8]
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,208 days). Its orbit is tilted by 2 degrees to the plane of the ecliptic and shows an eccentricity of 0.13.[1] The asteroid has a notably long rotation period of 178 hours[6] and an albedo in the range of 0.20 to 0.30, according to the surveys carried out by the Japanese Akari satellite and the U.S Wide-field Infrared Survey Explorer with its NEOWISE mission, as well as further ground-based observations.[4][5][6]
Any reference of this name to a person or occurrence is unknown.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 641 Agnes (1907 ZX)" (2015-08-06 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (641) Agnes. Springer Berlin Heidelberg. p. 64. ISBN 978-3-540-29925-7. Retrieved January 2016.
- 1 2 3 "LCDB Data for (641) Agnes". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved January 2016.
- 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved January 2016.
- 1 2 3 4 5 Pilcher, Frederick; Franco, Lorenzo; Martinez, Luis (April 2014). "Rotation Period and H-G Parameters of 641 Agnes". The Minor Planet Bulletin 41 (2): 71–72. Bibcode:2014MPBu...41...71P. ISSN 1052-8091. Retrieved January 2016.
- ↑ Lagerkvist, C.-I. (March 1978). "Photographic photometry of 110 main-belt asteroids". Astronomy and Astrophysics Supplement Series: 361–381. Bibcode:1978A&AS...31..361L. Retrieved January 2016.
- ↑ "641 Agnes (1907 ZX)". Minor Planet Center. Retrieved January 2016.
External links
- Occultation of Star HIP 103032 by 641 Agnes
- Asteroid Lightcurve Database (LCDB), query form (info)
- 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
- 641 Agnes at the JPL Small-Body Database
| ||||||
| ||||||||||||||||||||||||||||