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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08568868056246171 5.6158e-08  
a 2.402072916794524 2.4307e-08 au
q 2.196242457939578 1.3834e-07 au
i 12.0896873136323 7.4988e-06 deg
node 69.35352466840617 3.095e-05 deg
peri 212.9498857193614 6.5529e-05 deg
M 266.9366422313198 6.5719e-05 deg
tp 2457752.023144123894
(2016-Dec-29.52314412)
0.00025137 JED
period 1359.808359796691
3.72
2.064e-05
5.651e-08
d
yr
n .264743187822308 4.0185e-09 deg/d
Q 2.607903375649471 2.639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      964  
   data-arc span      9021 days (24.70 yr)  
   first obs. used      1990-05-15  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45861  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:30:51  

Additional Information
 Earth MOID = 1.18746 au 
 Jupiter MOID = 2.47699 au 
 T_jup = 3.490 
[ 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 13.3 mag n/a MPO350901  
rotation period rot_per 3.4 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 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
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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