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437237 (2012 XG21)
Classification: Main-belt Asteroid          SPK-ID: 2437237
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718425096845844 9.1318e-08  
a 2.735367745767166 4.0117e-08 au
q 2.265315287424272 2.6229e-07 au
i 5.543024945050647 1.1303e-05 deg
node 239.7652908464507 9.3934e-05 deg
peri 96.93420234220872 9.8863e-05 deg
M 306.1115508899932 3.0489e-05 deg
tp 2459247.851867403759
(2021-Feb-02.35186740)
0.00014158 TDB
period 1652.425960219697
4.52
3.6352e-05
9.953e-08
d
yr
n .2178615010091807 4.7927e-09 deg/d
Q 3.20542020411006 4.7011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      71  
   data-arc span      5165 days (14.14 yr)  
   first obs. used      2003-11-30  
   last obs. used      2018-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52229  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-06 09:50:53  

Additional Information
 Earth MOID = 1.26431 au 
 Jupiter MOID = 2.21402 au 
 T_jup = 3.324 
[ 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 17.2   n/a MPO434608  

437237 (2012 XG21)          Discovered 2003-Nov-30 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-06-04

Alternate Designations
 2012 XG21 = 2003 WP165 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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