(15550) Sydney

Asteroid (15550) Sydney
Properties of the orbit ( animation ) Epoch: 4th November 2013 ( JD 2,456,600.5)
Orbit type	Main outer belt asteroid
Asteroid family	Eos family
Major semi-axis	2.9800 AU
eccentricity	0.1177
Perihelion - aphelion	2.6293 AU - 3.3307 AU
Inclination of the orbit plane	9.5906 °
Length of the ascending node	228.2879 °
Argument of the periapsis	112.9286 °
Sidereal period	5.14 a
Mean orbital velocity	17.27 km / s
Physical Properties
Absolute brightness	13.1 mag
history
Explorer	John Broughton
Date of discovery	March 31, 2000
Another name	2000 FR ₁₀ , 1999 CM ₆₇
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.

(15550) Sydney is a major outer belt asteroid discovered on March 31, 2000 by Australian amateur astronomer John Broughton at the Reedy Creek Observatory ( IAU code 428). The observatory is located in the district of Reedy Creek the city of Gold Coast in Queensland .

The asteroid belongs to the Eos family , a group of asteroids which typically have large semiaxes from 2.95 to 3.1 AU , bounded inward by the Kirkwood gap of the 7: 3 resonance with Jupiter , and orbital inclinations between 8 ° and 12 °. The group is named after the asteroid (221) Eos . The family is believed to have emerged from a collision more than a billion years ago. The timeless (non- osculating ) orbital elements of (15550) Sydney are almost identical to those of three smaller (assuming the absolute magnitude of 14.5, 14.3 and 15.3 compared to 13.1) asteroids: (69199) 1278 T-2 , (113772) 2002 TK ₁₈₃ and (274018) 2007 RB ₆ .

(15550) Sydney was named after Sydney on May 9, 2001 , the largest city in Australia. Sydney is the birthplace of John Broughton.

Web links