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1863 Antinous

Stony asteroid and near-Earth object

Field	Value
minorplanet	yes
name	1863 Antinous
background	#FFC2E0
discovery_ref
discovered	7 March 1948
discoverer	C. A. Wirtanen
discovery_site	Lick Obs.
mpc_name	(1863) Antinous
pronounced
alt_names	1948 EA
named_after	Antinous (Greek mythology)
mp_category	{{Hlist
NEO<ref name	"jpldata" /
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	68.91 yr (25,168 days)
earliest_precovery_date	5 March 1948
aphelion	3.6293 AU
perihelion	0.8895 AU
semimajor	2.2594 AU
eccentricity	0.6063
period	3.40 yr (1,240 days)
mean_anomaly	139.55°
mean_motion	/ day
inclination	18.398°
asc_node	346.48°
arg_peri	268.00°
moid	0.1836 AU (71.5 LD)
dimensions	{{Ubl
1.80 km <ref name	"lcdb" /
2.1 km <ref name	"jpldata" /
{{val	3.16	u	km}}
{{val	3.23	u	km}}
rotation	{{Ubl
{{val	4.02	ul	h}}
{{val	4.386	0.004	u	h}}
{{val	7.453	0.005	u	h}}
{{val	7.4568	0.0017	u	h}}
{{val	7.471	0.005	u	h}}
albedo	{{Ubl
<ref name	"Trilling-2010" /
<ref name	"Thomas-2011b" /
0.24 <ref name	"jpldata" /
0.29 <ref name	"lcdb" /
spectral_type	{{Hlist
Sq <ref name	"jpldata" /
L<ref name	"Carry-2016" /
SU<ref name	"lcdb" /
B–V	0.763
U–B	0.359
abs_magnitude	{{Ubl
15.00<ref name	"Carry-2016" /
{{efn	name	LCDB-Pravec-1999}}
15.5<ref name	"Trilling-2010" /
15.54<ref name	"jpldata" /
15.62<ref name	"Binzel-1987b" /
<ref name	"lcdb" /
<ref name	"Harris-1999a" /

| Apollo | NEO | 1.80 km (derived) | 2.1 km (Gehrels) | | | | | | | | | | 0.24 (Gehrels) | 0.29 (derived) | SU (Tholen) | Sq (SMASS) | L | SU | B–V = 0.763 | U–B = 0.359 | 15.00 | (R) | 15.5 | 15.54 | 15.62 | |

1863 Antinous , provisional designation , is a stony asteroid and near-Earth object, approximately 2–3 kilometers in diameter. It was discovered on 7 March 1948 by American astronomer Carl Wirtanen at Lick Observatory on the summit of Mount Hamilton, California. It was named after Antinous from Greek mythology.

Orbit and classification

Antinous is also classified as a Mars-crosser and Apollo asteroid. The SU/Sq-type asteroid orbits the Sun in the inner main-belt at a distance of 0.9–3.6 AU once every 3 years and 5 months (1,240 days). Its orbit has an eccentricity of 0.61 and an inclination of 18° with respect to the ecliptic.

It has an Earth Minimum orbit intersection distance (MOID) of 0.1836 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 million km.

Physical characteristics

In the Tholen and SMASS taxonomic scheme, Antinous is characterized as a SU and Sq type, respectively, which are subtypes of the broader group of S-type asteroids. The Apollo asteroid has a rotation period of 7.46 hours and an albedo between 0.10 and 0.240,

Naming

This minor planet was named after Antinous from 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. The official was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3935).

Notes

References

|display-authors = 6 |access-date= 12 December 2016|doi-access= free

|display-authors = 6 |doi-access= free

|access-date= 12 December 2016}}

|access-date= 12 December 2016|arxiv = 1601.02087 |s2cid = 119258489

References

{{dict.com. Antinous

Info: Wikipedia Source

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apollo-asteroids discoveries-by-carl-a.-wirtanen named-minor-planets su-type-asteroids-(tholen) astronomical-objects-discovered-in-1948

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