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120720 (1997 SG12)
Classification: Main-belt Asteroid          SPK-ID: 2120720
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07120934304940979 4.9416e-08  
a 2.400712787954239 1.5481e-08 au
q 2.2297596074737 1.1782e-07 au
i 3.898351404027099 6.0278e-06 deg
node 338.3532355572207 6.5421e-05 deg
peri 146.5641554206869 7.6499e-05 deg
M 294.761148976914 4.3373e-05 deg
tp 2459246.713883672967
(2021-Feb-01.21388367)
0.00016493 TDB
period 1358.653574246766
3.72
1.3142e-05
3.598e-08
d
yr
n .2649682058942678 2.563e-09 deg/d
Q 2.571665968434777 1.6584e-08 au
  Orbit Determination Parameters
   # obs. used (total)      317  
   data-arc span      9515 days (26.05 yr)  
   first obs. used      1993-09-14  
   last obs. used      2019-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57082  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 14:14:37  

Additional Information
 Earth MOID = 1.24615 au 
 Jupiter MOID = 2.45512 au 
 T_jup = 3.519 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO449701  

120720 (1997 SG12)          Discovered 1997-Sep-27 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1997 SG12 = 2004 PA81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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