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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2093567320978816 5.8635e-08  
a 2.57773454692381 2.2212e-08 AU
q 2.038068465964028 1.4755e-07 AU
i 3.098370189908091 6.989e-06 deg
node 273.9626680699876 0.00021053 deg
peri 171.7059593488281 0.00021294 deg
M 112.3120200890705 3.0551e-05 deg
tp 2456528.893857665416
(2013-Aug-24.39385767)
0.00012781 JED
period 1511.665546624532
4.14
1.9539e-05
5.349e-08
d
yr
n .2381479162529441 3.0782e-09 deg/d
Q 3.117400627883592 2.6862e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      9537 days (26.11 yr)  
   first obs. used      1989-01-08  
   last obs. used      2015-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54997  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:08:45  

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 15.1 mag n/a MPO250422  

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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