1867 Deiphobus

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

    1. 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.
    2. 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 November 2015.
    3. 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 November 2015.
    4. 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 November 2015.
    5. 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 November 2015.
    6. 1 2 3 "LCDB Data for (1867) Deiphobus". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    7. 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 November 2015.
    8. ↑ 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 November 2015 – via MIT–supported research.
    9. ↑ 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 November 2015.
    10. ↑ "1867 Deiphobus (1971 EA)". Minor Planet Center. Retrieved November 2015.

    External links


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