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627 Charis

Main-belt asteroid

Field	Value
minorplanet	yes
name	627 Charis
background	#D6D6D6
discovery_ref
discoverer	A. Kopff
discovery_site	Heidelberg Obs.
discovered	4 March 1907
mpc_name	(627) Charis
alt_names	1907 XS
1932 CZ
1947 GK1966 DR
A917 DE
pronounced
named_after	Charis (Greek mythology)
mp_category	main-belt(outer)
Charis
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	110.65 yr (40,415 days)
aphelion	3.0675 AU
perihelion	2.7320 AU
semimajor	2.8998 AU
eccentricity	0.0578
period	4.94 yr (1,804 days)
mean_anomaly	318.92°
mean_motion	/ day
inclination	6.4732°
asc_node	142.48°
arg_peri	176.72°
dimensions	km
km
km
km
km
rotation	h (dated)
h
albedo

spectral_type	Tholen XB:
SMASS XP
B–V 0.680
U–B 0.261
abs_magnitude	9.95

1932 CZ 1947 GK1966 DR A917 DE Charis km km km km h

SMASS XP B–V 0.680 U–B 0.261

627 Charis is an asteroid and the parent body of the Charis family, located in the outer regions of the asteroid belt, approximately 49 kilometers in diameter. It was discovered on 4 March 1907, by German astronomer August Kopff at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Greek goddess Charis, a name which may have been inspired by the asteroid's provisional designation 1907 XS. ('Charis' is in Greek is spelled 'Χάρις'.)

Orbit and classification

Charis is the parent body of the Charis family (616), an asteroid family of more than 800 known members. It orbits the Sun in the outer main-belt at a distance of 2.7–3.1 AU once every 4 years and 11 months (1,804 days; semi-major axis of 2.90 AU). Its orbit has an eccentricity of 0.06 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Heidelberg in March 1907.

Physical characteristics

The overall spectral type for members of the Charis family is that of a C- and X-type. In the SMASS classification Charis is an X-type asteroid, while in the Tholen classification, its type is ambiguous, closest to an X- and somewhat similar to a carbonaceous B-type asteroid including a reported noisy spectrum (XB:). Conversely, the Wide-field Infrared Survey Explorer (WISE) characterized it as a primitive P-type asteroid.

Rotation period

Photometric observations of this asteroid by American astronomer Frederick Pilcher at the Organ Mesa Observatory (G50) in Las Cruces, New Mexico, during May 2012 gave a well-defined lightcurve with a rotation period of 27.888 hours and a brightness variation of 0.35 in magnitude (). The result supersedes a tentative period of at least 24 hours obtained by French amateur astronomer Pierre Antonini in March 2011 ().

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, Charis measures between 38.018 and 62.68 kilometers in diameter and its surface has an albedo between 0.047 and 0.0925.

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0786 and a diameter of 48.51 kilometers based on an absolute magnitude of 9.95.

Naming

This minor planet was named from Greek mythology, after the goddess Charis, the wife of Hephaestus after whom the minor planet was also named. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 65).

References

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.

charis-asteroids discoveries-by-august-kopff named-minor-planets xb:-type-asteroids-(tholen) x-type-asteroids-(smass) astronomical-objects-discovered-in-1907 minor-planets-named-after-their-provisional-designation

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