1863 Antinous

1863 Antinous
Discovery [1]
Discovered by C. A. Wirtanen
Discovery site Lick Observatory
Discovery date 7 March 1948
Designations
MPC designation 1863 Antinous
Named after
 Antinous
(Greek mythology)[2]
1948 EA
Apollo, NEO
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 68.03 yr (24848 days)
Aphelion 3.6300 AU (543.04 Gm)
Perihelion 0.88981 AU (133.114 Gm)
2.2599 AU (338.08 Gm)
Eccentricity 0.60626
3.40 yr (1240.9 d)
325.46°
0° 17m 24.432s / day
Inclination 18.400°
346.49°
267.99°
Earth MOID 0.183081 AU (27.3885 Gm)
Jupiter MOID 2.01325 AU (301.178 Gm)
Jupiter Tisserand parameter 3.297
Physical characteristics
Dimensions 2.1 km
3.16 km[3]
3.23 km[4]
1.80 km (derived)[5]
Mean radius
 1.05 km
7.4568 h (0.31070 d)[1]
4.02 h[6]
4.386±0.004 h[7]
0.24[1]
0.11[3]
0.10[4]
0.11±0.08[8]
0.29 (derived)[5]
B–V = 0.763
U–B = 0.359
SU (Tholen), Sq (SMASS)
15.54

    1863 Antinous, provisional designation 1948 EA, is a stony asteroid classified as near-Earth object, that measures about 2 kilometers in diameter. It was discovered on March 7, 1948 by American astronomer Carl Wirtanen at Lick Observatory on the summit of Mount Hamilton, California.[9]

    Antinous is also classified as a Mars-crosser and Apollo asteroid. The SU/Sq-type asteroid orbits the Sun at a distance of 0.9–3.6 AU once every 3 years and 5 months (1,240 days). Its orbit has a high eccentricity of 0.61 and is tilted by 18 degrees to the ecliptic plane. It takes 7.46 hours to rotate around its axis. Its albedo is 0.240,[1] while other observations find a much lower value of 0.10–0.11.[3][4][8]

    It has an Earth Minimum orbit intersection distance (MOID) of 0.1829 AU. In the 20th century Antinous passed within 30 Gm of the Earth five times; it will do so only once in the 21st. The nearest distance increases each time, from 26 to 29 Gm.

    The Apollo asteroid was named after Antinous of Greek mythology. Antinous was one of the many unwelcome suitors for Penelope's hand while her husband, Odysseus, was away on his travels (also see 201 Penelope and 1143 Odysseus). Antinous, being the most insolent of all, was the first to be killed by Odysseus on his return.[2]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1863 Antinous (1948 EA)" (2014-12-13 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1863) Antinous. Springer Berlin Heidelberg. p. 149. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 Harris, A. W.; Mommert, M.; Hora, J. L.; Mueller, M.; Trilling, D. E.; Bhattacharya, B.; et al. (March 2011). "ExploreNEOs. II. The Accuracy of the Warm Spitzer Near-Earth Object Survey". The Astronomical Journal 141 (3): 10. Bibcode:2011AJ....141...75H. doi:10.1088/0004-6256/141/3/75. Retrieved November 2015.
    4. 1 2 3 Trilling, D. E.; Mueller, M.; Hora, J. L.; Harris, A. W.; Bhattacharya, B.; Bottke, W. F.; et al. (September 2010). "ExploreNEOs. I. Description and First Results from the Warm Spitzer Near-Earth Object Survey". The Astronomical Journal 140 (3): 770–784. Bibcode:2010AJ....140..770T. doi:10.1088/0004-6256/140/3/770. Retrieved November 2015.
    5. 1 2 "LCDB Data for (1863) Antinous". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    6. ↑ Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus: 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Retrieved November 2015.
    7. ↑ Harris, A. W.; Young, J. W.; Bowell, E.; Tholen, D. J. (November 1999). "Asteroid Lightcurve Observations from 1981 to 1983". Icarus 142 (1). Bibcode:1999Icar..142..173H. doi:10.1006/icar.1999.6181. Retrieved November 2015.
    8. 1 2 Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal 142 (3): 12. Bibcode:2011AJ....142...85T. doi:10.1088/0004-6256/142/3/85. Retrieved November 2015.
    9. ↑ "1863 Antinous (1948 EA)". Minor Planet Center. Retrieved November 2015.

    External links


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