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120983 (1998 XG7)
Classification: Main-belt Asteroid          SPK-ID: 2120983
[ 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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08170332244820841 3.429e-08  
a 3.14760293979981 2.1942e-08 au
q 2.890433321870417 1.0602e-07 au
i 4.147211446508051 3.8301e-06 deg
node 85.28072359486571 6.2969e-05 deg
peri 199.9783427504966 6.9308e-05 deg
M 108.3367232708317 2.9085e-05 deg
tp 2458586.679292618450
(2019-Apr-13.17929262)		 0.00016486 TDB
period 2039.709601562712
5.58		 2.1328e-05
5.839e-08		 d
yr
n .176495712783912 1.8455e-09 deg/d
Q 3.404772557729203 2.3734e-08 au
   Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      8070 days (22.09 yr)  
   first obs. used      1998-12-08  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55288  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:20  

Additional Information
 Earth MOID = 1.87253 au 
 Jupiter MOID = 1.70903 au 
 T_jup = 3.199 
[ 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 15.08   n/a E2021B55  
diameter diameter 5.500 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120983 (1998 XG7)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

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