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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2063315265498023 4.3443e-08  
a 2.256113974154959 7.2537e-09 au
q 1.790606533797225 9.753e-08 au
i 5.314983965177499 5.2366e-06 deg
node 353.6953613813821 3.9987e-05 deg
peri 321.9209042579678 4.1262e-05 deg
M 270.9451758011785 1.1509e-05 deg
tp 2459506.692768838372
(2021-Oct-19.19276884)		 4.036e-05 TDB
period 1237.770078976505
3.39		 5.9694e-06
1.634e-08		 d
yr
n .2908456151223813 1.4027e-09 deg/d
Q 2.721621414512693 8.7503e-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 = .778944 au 
 Jupiter MOID = 2.5829 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 15.94   n/a E2021B55  

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

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