1867 Deiphobus
| Discovery [1] | |
|---|---|
| Discovered by |
C. U. Cesco A. G. Samuel |
| Discovery site | El Leoncito Complex |
| Discovery date | 3 March 1971 |
| Designations | |
| MPC designation | 1867 Deiphobus |
Named after |
Deiphobus (Greek mythology)[2] |
| 1971 EA | |
| Jupiter trojan | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 45.05 yr (16454 days) |
| Aphelion | 5.3500 AU (800.35 Gm) |
| Perihelion | 4.9072 AU (734.11 Gm) |
| 5.1286 AU (767.23 Gm) | |
| Eccentricity | 0.043166 |
| 11.61 yr (4242.23 d) | |
| 178.30° | |
| 0° 5m 5.5s / day | |
| Inclination | 26.911° |
| 283.70° | |
| 359.86° | |
| Earth MOID | 3.88909 AU (581.800 Gm) |
| Jupiter MOID | 0.160115 AU (23.9529 Gm) |
| Jupiter Tisserand parameter | 2.783 |
| Physical characteristics | |
| Dimensions |
122.67 km[3] 131.31±1.87 km[4] 118.22±1.62 km[5] 122.65 km (derived)[6] |
Mean radius | 61.335 ± 1.95 km |
|
58.66 h (2.444 d)[1][7] 24 h[8] 15.72±0.01 h[9] 51.70±0.05 h[lower-alpha 1] | |
|
0.0422[3] 0.037±0.001[4] 0.060±0.009[5] 0.0396 (derived)[6] 0.0422 ± 0.003[1] | |
|
B–V = 0.734 U–B = 0.232 Tholen = D D [6] | |
| 8.3 | |
|
| |
1867 Deiphobus, provisional designation 1971 EA, is a large Jupiter trojan, about 123 kilometers in diameter. It was discovered by Argentine astronomers Carlos Cesco and A. G. Samuel at the Leoncito Astronomical Complex in Argentina on 3 March 1971.[10]
The D-type minor planet orbits the Sun at a distance of 4.9–5.4 AU once every 11.61 years (4,242 days). It has an albedo of 0.042. Photometric observations of this asteroid during 1994 were used to build a light curve showing a slow rotation period of 58.66 ± 0.18 hours with a brightness variation of 0.27 ± 0.03 magnitude.[7]
It was named after the Trojan warrior, Deiphobus, son of Priamus (also see 108 Hecuba and 884 Priamus).[2]
References
- ↑ Melita (2012), gives a rotation period of 51.70±0.05. Summary figures listed at www
.minorplanet .info /PHP /GenerateALCDEFPage _Local .php?AstInfo=1867%7CDeiphobus
- 1 2 3 4 "JPL Small-Body Database Browser: 1867 Deiphobus (1971 EA)" (2015-10-16 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1867) Deiphobus. Springer Berlin Heidelberg. p. 150. ISBN 978-3-540-29925-7. Retrieved 6 November 2015.
- 1 2 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 6 November 2015.
- 1 2 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 6 November 2015.
- 1 2 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 6 November 2015. - 1 2 3 "LCDB Data for (1867) Deiphobus". Asteroid Lightcurve Database (LCDB). Retrieved 6 November 2015.
- 1 2 Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. Retrieved 6 November 2015.
- ↑ French, L. M. (November 1987). "Rotation properties of four L5 Trojan asteroids from CCD photometry". Icarus: 325–341. Bibcode:1987Icar...72..325F. doi:10.1016/0019-1035(87)90178-3. ISSN 0019-1035. Retrieved 6 November 2015 – via MIT–supported research.
- ↑ French, Linda M.; Stephens, Robert D.; Coley, Daniel R.; Megna, Ralph; Wasserman, Lawrence H. (July 2012). "Photometry of 17 Jovian Trojan Asteroids". The Minor Planet Bulletin. 39 (3): 183–187. Bibcode:2012MPBu...39..183F. ISSN 1052-8091. Retrieved 6 November 2015.
- ↑ "1867 Deiphobus (1971 EA)". Minor Planet Center. Retrieved 6 November 2015.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- 1867 Deiphobus at the JPL Small-Body Database
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