(55477) Soroban

Asteroid (55477) Soroban
Properties of the orbit ( animation ) Epoch: February 16, 2017 ( JD 2,457,800.5)
Orbit type	Main outer belt asteroid
Major semi-axis	3.1554 AU
eccentricity	0.1999
Perihelion - aphelion	2.5248 AU - 3.7861 AU
Inclination of the orbit plane	2.7586 °
Length of the ascending node	115.9964 °
Argument of the periapsis	204.1887 °
Time of passage of the perihelion	October 22, 2017
Sidereal period	5.61 a
Mean orbital velocity	16.76 km / s
Physical Properties
Medium diameter	8.056 (± 0.222) km
Albedo	0.068 (± 0.013)
Absolute brightness	14.1 mag
history
Explorer	Hiromu Maeno
Date of discovery	October 18, 2001
Another name	2001 UC _1st
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(55477) Soroban is an asteroid of the main outer belt . It was discovered on October 18, 2001 by the Japanese amateur astronomer Hiromu Maeno at the observatory in Shishikui ( IAU code 342). Shishikui rose in Kaiyō in 2006 and is located in Tokushima Prefecture on Shikoku Island .

The mean diameter of the asteroid was calculated to be about 8 km, the albedo of 0.068 (± 0.013) indicates a dark surface.

Mean distance from the Sun ( major semi-axis ), eccentricity and inclination of the orbit plane of the asteroid roughly correspond to the Themis family, a group of asteroids named after (24) Themis .

(55477) Soroban was named on July 21, 2005 after Soroban , the Japanese abacus .

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