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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2093567405637526 5.8429e-08  
a 2.577734538795675 2.1712e-08 AU
q 2.038068437714805 1.4664e-07 AU
i 3.09836952376151 6.6094e-06 deg
node 273.962639941005 0.00018015 deg
peri 171.7060223521485 0.00018206 deg
M 112.311992748759 2.6175e-05 deg
tp 2456528.893974699933
(2013-Aug-24.39397470)
0.00010857 JED
period 1511.665539474636
4.14
1.9099e-05
5.229e-08
d
yr
n .2381479173793392 3.0088e-09 deg/d
Q 3.117400639876546 2.6257e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      464  
   data-arc span      9650 days (26.42 yr)  
   first obs. used      1989-01-08  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54467  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:43  

Additional Information
 Earth MOID = 1.05406 AU 
 T_jup = 3.393 
[ 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 15.2 mag n/a MPO337438  

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 | Physical Parameters | Discovery Circumstances ]
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