(12490) suffering

Asteroid (12490) Leiden
Properties of the orbit ( animation ) Epoch: May 23, 2014 ( JD 2,456,800.5)
Orbit type	Main outer belt asteroid
Major semi-axis	3.2018 AE
eccentricity	0.1195
Perihelion - aphelion	2.8191 AU - 3.5844 AU
Inclination of the orbit plane	0.9566 °
Length of the ascending node	146.4594 °
Argument of the periapsis	66.8745 °
Sidereal period	5.73 a
Mean orbital velocity	16.63 km / s
Physical Properties
Absolute brightness	14.3 mag
history
Explorer	Eric Walter Elst
Date of discovery	May 3, 1997
Another name	1997 JB ₁₃ , 1991 GH ₉
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.

(12490) Leiden is an asteroid of the main outer belt discovered on May 3, 1997 by the Belgian astronomer Eric Walter Elst at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809). The asteroid had already been sighted at the La Silla Observatory on April 10 and 19, 1991 under the provisional designation 1991 GH ₉ .

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 .

(12490) Leiden was named after the Dutch city of Leiden on September 28, 2004 .

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