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120984 (1998 XN7)
Classification: Main-belt Asteroid          SPK-ID: 2120984
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1419172365807551 4.2221e-08  
a 2.187711440689568 7.3678e-09 au
q 1.877237478590802 9.4403e-08 au
i 2.478557675225048 3.0998e-06 deg
node 102.6629156322119 0.00010342 deg
peri 276.0743472718084 0.00010405 deg
M 266.4911396679977 1.1918e-05 deg
tp 2459307.496728160779
(2021-Apr-02.99672816)
3.9807e-05 TDB
period 1181.90748711389
3.24
5.9707e-06
1.635e-08
d
yr
n .3045923677825977 1.5387e-09 deg/d
Q 2.498185402788334 8.4134e-09 au
  Orbit Determination Parameters
   # obs. used (total)      725  
   data-arc span      7452 days (20.40 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56955  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:02:19  

Additional Information
 Earth MOID = .881174 au 
 Jupiter MOID = 2.96013 au 
 T_jup = 3.661 
[ 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 16.3   n/a MPO264158  

120984 (1998 XN7)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 XN7 = 2001 QR256 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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