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120985 (1998 XT15)
Classification: Main-belt Asteroid          SPK-ID: 2120985
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2062163216301126 4.3433e-08  
a 2.256468278870735 7.2607e-09 au
q 1.791147690526981 9.7523e-08 au
i 5.314509847568191 5.2361e-06 deg
node 353.6952808240266 3.999e-05 deg
peri 321.8828807748627 4.1267e-05 deg
M 212.8213321932991 1.1372e-05 deg
tp 2459506.656295190378
(2021-Oct-19.15629519)
4.0392e-05 TDB
period 1238.061663310148
3.39
5.9757e-06
1.636e-08
d
yr
n .2907771160908776 1.4035e-09 deg/d
Q 2.72178886721449 8.758e-09 au
  Orbit Determination Parameters
   # obs. used (total)      839  
   data-arc span      7805 days (21.37 yr)  
   first obs. used      1998-12-15  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50727  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:45  

Additional Information
 Earth MOID = .781452 au 
 Jupiter MOID = 2.5828 au 
 T_jup = 3.589 
[ 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 15.9   n/a MPO493691  

120985 (1998 XT15)          Discovered 1998-Dec-15 by Klet at Klet
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 XT15 = 2000 DY75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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