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1088 Mitaka

Asteroid

Field	Value
minorplanet	yes
name	1088 Mitaka
background	#D6D6D6
image	001088-asteroid shape model (1088) Mitaka.png
caption	Modelled shape of Mitaka from its lightcurve
discovery_ref
discoverer	O. Oikawa
discovery_site	Tokyo Astronomical Obs.
discovered	17 November 1927
mpc_name	(1088) Mitaka
alt_names	1927 WA1942 FR
1971 BE
A917 RA
named_after	Mitaka (Japanese village)
mp_category	{{plainlist
* {{nowrap	main-belt<ref name	"MPC-object" /(inner)}}
* background<ref name	"AstDys-object" /}}
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	88.22 yr (32,224 days)
aphelion	2.6328 AU
perihelion	1.7722 AU
semimajor	2.2025 AU
eccentricity	0.1954
period	3.27 yr (1,194 days)
mean_anomaly	200.92°
mean_motion	/ day
inclination	7.6514°
asc_node	54.495°
arg_peri	319.50°
mean_diameter	km
km
km
km
km
16.02 km (taken)
rotation	h
h
h
h
h
h
h
pole_ecliptic_lat	{{plainlist
* (115.0°, 46.0°) (λ<sub>1</sub>/β<sub>1</sub>)<ref name	"Ferret" /
* (278.0°, −72.0°) (λ<sub>2</sub>/β<sub>2</sub>)<ref name	"Ferret" /}}
albedo

spectral_type	{{plainlist
* Tholen {{	}} S
* SMASS {{	}} S
* B–V {{	}} 0.947
* U–B {{	}} 0.594}}
abs_magnitude	11.3911.5511.62

1971 BE A917 RA

main-belt(inner)
background}} km km km km 16.02 km (taken) h h h h h h
(115.0°, 46.0°) (λ1/β1)
(278.0°, −72.0°) (λ2/β2)}}
Tholen S
SMASS S
B–V 0.947
U–B 0.594}}

1088 Mitaka (prov. designation: ) is a bright background asteroid from the inner regions of the asteroid belt. It was discovered on 17 November 1927, by Japanese astronomer Okuro Oikawa at the old Tokyo Astronomical Observatory in Japan. The stony S-type asteroid has a notably short rotation period of 3.0 hours and measures approximately 15 km in diameter. It was named after the Japanese village of Mitaka.

Orbit and classification

Mitaka is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 3 months (1,194 days). Its orbit has an eccentricity of 0.20 and an inclination of 8° with respect to the ecliptic. The asteroid was first observed as at the Simeiz Observatory on 11 September 1917. The body's observation arc begins at Tokyo in December 1927, one month after its official discovery observation.

Naming

This minor planet was named after the Japanese village of Mitaka, where the discovering Tokyo Astronomical Observatory was located. Nowadays the city of Mitaka hosts the headquarters of the National Astronomical Observatory of Japan with the Tokyo Photoelectric Meridian Circle, public relation and data centers, and several telescopes. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 103).

Physical characteristics

Mitaka is a common, stony S-type asteroid in both the Tholen and Bus–Binzel SMASS classification.

Rotation period and poles

Several rotational lightcurves of Mitaka have been obtained from photometric observations since 1989. Analysis of the best rated lightcurve by French amateur astronomer Pierre Antonini gave a rotation period of 3.0361 hours with a consolidated brightness variation of 0.23 to 0.62 magnitude ().

In 2009 and 2011, modelling of Mitakas lightcurve using photometric data from the US Naval Observatory, the Uppsala Asteroid Photometric Catalogue (UAPC), the Palmer Divide Observatory's archive, the Palomar Transient Factory survey, and from individual observers, gave a concurring rotation period of 3.035377 and 3.035378 hours. The modeled lightcurves also gave a spin axis of (115.0°, 46.0°) and (278.0°, −72.0°), as well as (280.0°, −71.0°) in ecliptic coordinates (λ, β).

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Mitaka measures between 11.33 and 16.016 kilometers in diameter and its surface has an albedo between 0.1549 and 0.37. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE results with an albedo of 0.1549 and takes a diameter of 16.02 kilometers based on an absolute magnitude of 11.62.

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.

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