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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2076903409293931 3.7306e-08  
a 2.578169993241326 1.1192e-08 au
q 2.042708988371104 9.6048e-08 au
i 3.097498651046529 4.3758e-06 deg
node 273.8600885571994 7.2766e-05 deg
peri 172.8207468817735 7.3568e-05 deg
M 321.1696482015031 1.2259e-05 deg
tp 2459559.592719884301
(2021-Dec-11.09271988)
5.1924e-05 TDB
period 1512.048602161288
4.14
9.8457e-06
2.696e-08
d
yr
n .23808758493968 1.5503e-09 deg/d
Q 3.113630998111548 1.3516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      11653 days (31.90 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51091  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:42:48  

Additional Information
 Earth MOID = 1.05909 au 
 Jupiter MOID = 2.11111 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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