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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1415699554189299 4.2246e-08  
a 2.187365571319159 7.465e-09 au
q 1.877700324902604 9.4355e-08 au
i 2.478445874077162 3.0996e-06 deg
node 102.6621405533783 0.00010344 deg
peri 276.0740873564893 0.00010407 deg
M 327.3815382077833 1.208e-05 deg
tp 2459307.563506028653
(2021-Apr-03.06350603)
3.9892e-05 TDB
period 1181.627215159234
3.24
6.049e-06
1.656e-08
d
yr
n .3046646145091429 1.5596e-09 deg/d
Q 2.497030817735715 8.5219e-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 = .88025 au 
 Jupiter MOID = 2.96239 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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