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27980 (1997 UA21)
Classification: Main-belt Asteroid          SPK-ID: 2027980
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08670014417552868 3.9943e-08  
a 2.574487710111695 1.3276e-08 au
q 2.351279254466884 1.0056e-07 au
i 9.593270990393224 4.1481e-06 deg
node 209.688125390204 2.5374e-05 deg
peri 92.90358187497561 4.0123e-05 deg
M 226.6139225132456 3.5532e-05 deg
tp 2459559.539715003760
(2021-Dec-11.03971500)
0.0001512 TDB
period 1508.810373566452
4.13
1.1671e-05
3.195e-08
d
yr
n .2385985716343198 1.8456e-09 deg/d
Q 2.797696165756505 1.4427e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1063  
   data-arc span      9680 days (26.50 yr)  
   first obs. used      1993-10-22  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51715  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 06:25:00  

Additional Information
 Earth MOID = 1.36061 au 
 Jupiter MOID = 2.37765 au 
 T_jup = 3.403 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO502367  

27980 (1997 UA21)          Discovered 1997-Oct-27 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 UA21 = 1996 HS13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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