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21274 (1996 SG4)
Classification: Main-belt Asteroid          SPK-ID: 2021274
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2076949907335777 3.7804e-08  
a 2.579147580543407 1.1382e-08 au
q 2.043471547701915 9.7267e-08 au
i 3.097607554656624 4.4437e-06 deg
node 273.8727719958418 7.4169e-05 deg
peri 172.7026482118324 7.4985e-05 deg
M 274.6145723034988 1.2268e-05 deg
tp 2459559.334320707883
(2021-Dec-10.83432071)
5.2504e-05 TDB
period 1512.90868875195
4.14
1.0015e-05
2.742e-08
d
yr
n .2379522324622092 1.5752e-09 deg/d
Q 3.1148236133849 1.3746e-08 au
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      11653 days (31.90 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51172  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:44  

Additional Information
 Earth MOID = 1.05952 au 
 Jupiter MOID = 2.10989 au 
 T_jup = 3.393 
[ 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 15.23   n/a E2021B10  

21274 (1996 SG4)          Discovered 1996-Sep-19 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 SG4 = 1992 YS1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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