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462 Eriphyla

Main-belt asteroid

Field	Value
minorplanet	yes
name	462 Eriphyla
background	#D6D6D6
image	000462-asteroid shape model (462) Eriphyla.png
caption	Modelled shape of Eriphyla from its lightcurve
discovery_ref
discoverer	M. F. Wolf
discovery_site	Heidelberg Obs.
discovered	22 October 1900
mpc_name	(462) Eriphyla
alt_names	A900 UJ1927 CP
1946 DB1948 OG
1957 KB
1958 RR1959 WB
A896 YAA907 BB
1900 FQ
pronounced
named_after	Eriphyle
(Greek mythology)
mp_category	{{plainlist
* main-belt<ref name	"MPC-object" /(outer)
* Koronis<ref name	"AstDys-object" /}}
orbit_ref
epoch	31 May 2020 (JD 2459000.5)
uncertainty	0
observation_arc	119.28 yr (43,567 d)
aphelion	3.1252 AU
perihelion	2.6181 AU
semimajor	2.8717 AU
eccentricity	0.0883
period	4.87 yr (1,777 d)
mean_anomaly	224.51°
mean_motion	/ day
inclination	3.1927°
asc_node	105.28°
arg_peri	251.08°
mean_diameter	{{plainlist
* {{val	34.274	0.221	ul	km}}
* {{val	35.63	1.4	u	km}}
* {{val	39.22	0.49	u	km}}}}
rotation
pole_ecliptic_lat	{{plainlist
* (119.0°, 7.0°) (λ<sub>1</sub>/β<sub>1</sub>)<ref name	"Ferret" /
* {{nowrap	(301.0°, 5.0°) (λ<sub>2</sub>/β<sub>2</sub>)<ref name	"Ferret" /}}}}
albedo	{{plainlist
* <ref name	"AKARI" /
* <ref name	"Mainzer-2016" /
* <ref name	"SIMPS" /}}
spectral_type	{{plainlist
* Tholen {{	}} S
* SMASS {{	}} S
* B–V {{	}}
* U–B {{	}} }}
abs_magnitude	9.4

1946 DB1948 OG 1957 KB 1958 RR1959 WB A896 YAA907 BB 1900 FQ (Greek mythology)

main-belt(outer)
Koronis}}
}}
(119.0°, 7.0°) (λ1/β1)
(301.0°, 5.0°) (λ2/β2)}}
}}
Tholen S
SMASS S
B–V
U–B }}

462 Eriphyla (prov. designation: or ) is a Koronian asteroid from the outer regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 22 October 1900. The stony S-type asteroid has a rotation period of 8.7 hours and measures approximately 35 km in diameter. It was named after Eriphyle, from Greek mythology.

Orbit and classification

Eriphyla is a core member of the Koronis family (605), a very large outer asteroid family with nearly co-planar ecliptical orbits. It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,777 days; semi-major axis of 2.87 AU). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic. The asteroid was first observed as at Nice Observatory on 31 December 1896. The body's observation arc begins at Heidelberg on 11 November 1900, three weeks after its official discovery observation.

Naming

This minor planet was named from Greek mythology after Eriphyle, wife of Amphiaraus whom she persuaded to take part in a raiding venture which lead to the tragic war of the Seven against Thebes. The was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 50).

Physical characteristics

In both the Tholen and SMASS classification, Eriphyla is a common stony S-type asteroid.

Rotation period

In October 2002, a rotational lightcurve of Eriphyla was obtained from photometric observations by Stephen M. Slivan. Lightcurve analysis gave a well-defined rotation period of hours with a brightness variation of magnitude (). Several more lightcurves were published since 1987.

A modeled lightcurve using photometric data from the Lowell Photometric Database and from the Wide-field Infrared Survey Explorer (WISE) was published in 2018. It gave a concurring sidereal period of hours and includes two spin axes at (119.0°, 7.0°) and (301.0°, 5.0°) in ecliptic coordinates (λ, β).

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Eriphyla measures between 34.274 and 41.882 kilometers in diameter and its surface has an albedo between 0.1746 and 0.2829. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.2438 and derives a diameter of 35.32 kilometers based on an absolute magnitude of 9.41.

References

'Eriphyle' in Noah Webster (1884) ''A Practical Dictionary of the English Language''

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

koronis-asteroids discoveries-by-max-wolf named-minor-planets s-type-asteroids-(tholen) s-type-asteroids-(smass) astronomical-objects-discovered-in-1900

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