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12422 (1995 US8)
Classification: Main-belt Asteroid          SPK-ID: 2012422
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08665635719058605 5.743e-08  
a 2.400736455464072 2.4553e-08 AU
q 2.192697379658915 1.4193e-07 AU
i 12.09552700939564 7.8717e-06 deg
node 69.4150177749429 3.2955e-05 deg
peri 212.7378972358476 6.716e-05 deg
M 108.2282434093796 6.4447e-05 deg
tp 2456392.036488289775
(2013-Apr-09.53648829)
0.00024025 JED
period 1358.673665795977
3.72
2.0843e-05
5.707e-08
d
yr
n .2649642876452562 4.0648e-09 deg/d
Q 2.608775531269228 2.6681e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      904  
   data-arc span      8604 days (23.56 yr)  
   first obs. used      1990-05-15  
   last obs. used      2013-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49997  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-20 01:58:13  

Additional Information
 Earth MOID = 1.18494 AU 
 T_jup = 3.491 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a MPO266024  
rotation period rot_per 3.4 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

12422 (1995 US8)          Discovered 1995-Oct-27 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 US8 = 1990 JK1 = 1990 KO1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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