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120972 (1998 WE4)
Classification: Main-belt Asteroid          SPK-ID: 2120972
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1375051444475743 4.3693e-08  
a 2.245364725262306 7.2153e-09 au
q 1.936615524377624 9.8362e-08 au
i 4.306800048702435 4.4708e-06 deg
node 310.3469143679649 5.3481e-05 deg
peri 64.15840499197451 5.5327e-05 deg
M 170.8750379643729 1.3623e-05 deg
tp 2458417.182650789202
(2018-Oct-25.68265079)
4.6019e-05 TDB
period 1228.934595816567
3.36
5.9236e-06
1.622e-08
d
yr
n .2929366633712492 1.412e-09 deg/d
Q 2.554113926146987 8.2074e-09 au
  Orbit Determination Parameters
   # obs. used (total)      738  
   data-arc span      7860 days (21.52 yr)  
   first obs. used      1998-10-19  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52863  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:45  

Additional Information
 Earth MOID = .94163 au 
 Jupiter MOID = 2.92813 au 
 T_jup = 3.615 
[ 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 MPO459569  

120972 (1998 WE4)          Discovered 1998-Nov-20 by Kagawa, T. at Gekko
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 WE4 = 2001 QY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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