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215112 (1997 XR7)
Classification: Main-belt Asteroid          SPK-ID: 2215112
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2079750339881351 6.087e-08  
a 2.651979699333756 1.671e-08 au
q 2.100434131228973 1.6465e-07 au
i 13.02618411468327 6.2543e-06 deg
node 230.3895621459201 3.042e-05 deg
peri 91.6827634740836 3.5328e-05 deg
M 144.8285571761839 1.4739e-05 deg
tp 2458365.892174585036
(2018-Sep-04.39217458)
6.4622e-05 TDB
period 1577.443161789334
4.32
1.491e-05
4.082e-08
d
yr
n .2282174145606887 2.157e-09 deg/d
Q 3.203525267438537 2.0186e-08 au
  Orbit Determination Parameters
   # obs. used (total)      396  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1997-11-06  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52271  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:19:22  

Additional Information
 Earth MOID = 1.1371 au 
 Jupiter MOID = 2.27762 au 
 T_jup = 3.323 
[ 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 15.6   n/a MPO454544  
rotation period rot_per 6.503 h n/a LCDB (Rev. 2019-August); 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.]

215112 (1997 XR7)          Discovered 1997-Dec-06 by ODAS at Caussols
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

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