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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2094464424936237 5.8778e-08  
a 2.57788200284426 2.2482e-08 AU
q 2.037953788180192 1.4818e-07 AU
i 3.098378492911058 7.1278e-06 deg
node 273.9647579132172 0.00021713 deg
peri 171.7189454204103 0.00021972 deg
M 64.65773975401237 3.1814e-05 deg
tp 2456528.974265731797
(2013-Aug-24.47426573)
0.00013351 JED
period 1511.795257743871
4.14
1.9777e-05
5.415e-08
d
yr
n .2381274833056735 3.1151e-09 deg/d
Q 3.117810217508328 2.7191e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      438  
   data-arc span      9248 days (25.32 yr)  
   first obs. used      1989-01-08  
   last obs. used      2014-05-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55074  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:57:08  

Additional Information
 Earth MOID = 1.05356 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 15.1 mag n/a MPO250422  

21274 (1996 SG4)          Discovered 1996-Sep-19 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
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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