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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08183485880279515 3.9924e-08  
a 3.147137212361965 2.584e-08 au
q 2.889591682955301 1.3093e-07 au
i 4.147318632024144 4.3515e-06 deg
node 85.27865325746134 6.8991e-05 deg
peri 199.8773822935244 7.5593e-05 deg
M 73.12327638498655 3.0302e-05 deg
tp 2458586.285702271551
(2019-Apr-12.78570227)
0.00017239 TDB
period 2039.256917279733
5.58
2.5115e-05
6.876e-08
d
yr
n .1765348921705373 2.1742e-09 deg/d
Q 3.404682741768628 2.7955e-08 au
  Orbit Determination Parameters
   # obs. used (total)      569  
   data-arc span      7562 days (20.70 yr)  
   first obs. used      1998-12-08  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57293  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:18:56  

Additional Information
 Earth MOID = 1.8736 au 
 Jupiter MOID = 1.70989 au 
 T_jup = 3.200 
[ 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 15.0   n/a MPO432709  
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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