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1230 Riceia

Main-belt asteroid

Field	Value
minorplanet	yes
name	1230 Riceia
background	#D6D6D6
image	001230-asteroid shape model (1230) Riceia.png
caption	Shape model of Riceia from its lightcurve
discovery_ref
discoverer	K. Reinmuth
discovery_site	Heidelberg Obs.
discovered	9 October 1931
mpc_name	(1230) Riceia
alt_names	1964 TS
1964 UE1975 HH
pronounced
named_after	Hugh Rice
(U.S. amateur astronomer)
mp_category	main-belt(inner)
background
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	86.13 yr (31,459 days)
aphelion	3.0335 AU
perihelion	2.1104 AU
semimajor	2.5719 AU
eccentricity	0.1795
period	4.12 yr (1,507 days)
mean_anomaly	288.81°
mean_motion	/ day
inclination	10.515°
asc_node	200.55°
arg_peri	185.25°
dimensions	km
7.46 km (calculated)
rotation	h
albedo	0.20 (assumed)

spectral_type	S
abs_magnitude	12.9013.0

1964 UE1975 HH (U.S. amateur astronomer) background 7.46 km (calculated)

1230 Riceia, provisional designation , is a stony background asteroid from the central regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 9 October 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named after Hugh Rice, amateur astronomer of New York and director of the Museum of Natural Sciences.

Orbit and classification

Riceia is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,507 days; semi-major axis of 2.57 AU). Its orbit has an eccentricity of 0.18 and an inclination of 11° with respect to the ecliptic.

The body's observation arc begins at Heidelberg on 17 October 1931, or eight days after its official discovery observation.

Physical characteristics

Riceia has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey.

Rotation period and pole

In 2016, a rotational lightcurve of Riceia was modeled from photometric data from the Lowell Photometric Database. Lightcurve analysis gave a sidereal rotation period of 6.67317 hours as well as a spin axis of (37.0°, −63.0°) in ecliptic coordinates (λ, β).

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Riceia measures 6.19 kilometers in diameter and its surface has a high albedo of 0.318. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 7.46 kilometers based on an absolute magnitude of 13.0.

Naming

This minor planet was named after American amateur astronomer Hugh Rice, director of the Museum of Natural Sciences (possibly AMNH). The naming was proposed by Irving Meyer and endorsed by German astronomer Gustav Stracke who mentioned on a postcard in February 1937, that his American college, Meyer, who himself did not discover any asteroids, requested the naming after the city of Rutherford, where a private observatory was located at the time.

The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 113).

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.

background-asteroids discoveries-by-karl-wilhelm-reinmuth named-minor-planets astronomical-objects-discovered-in-1931

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