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120207 (2004 EG31)
Classification: Main-belt Asteroid          SPK-ID: 2120207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1443105300519651 3.3599e-08  
a 2.348736018094479 9.0035e-09 au
q 2.009788678371123 7.7886e-08 au
i 8.98809905765936 4.015e-06 deg
node 191.0084132521769 2.428e-05 deg
peri 63.21596041703412 2.8305e-05 deg
M 176.9864917762914 1.4009e-05 deg
tp 2458554.120821101647
(2019-Mar-11.62082110)
5.0473e-05 TDB
period 1314.769856546636
3.60
7.56e-06
2.07e-08
d
yr
n .2738121795289504 1.5744e-09 deg/d
Q 2.687683357817836 1.0303e-08 au
  Orbit Determination Parameters
   # obs. used (total)      646  
   data-arc span      8644 days (23.67 yr)  
   first obs. used      1997-05-09  
   last obs. used      2021-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51268  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:24:24  

Additional Information
 Earth MOID = 1.01324 au 
 Jupiter MOID = 2.36791 au 
 T_jup = 3.529 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO436580  
rotation period rot_per 5.707 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

120207 (2004 EG31)          Discovered 2004-Mar-13 by NEAT at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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