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249598 (1997 WB7)
Classification: Main-belt Asteroid          SPK-ID: 2249598
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2483447544970535 5.4023e-08  
a 2.758028421973277 1.6701e-08 au
q 2.073086530622428 1.5392e-07 au
i 7.753123911666163 5.3394e-06 deg
node 289.2671491081445 3.5492e-05 deg
peri 165.9333054401492 3.7338e-05 deg
M 329.587211845228 1.2103e-05 deg
tp 2459141.835177586206
(2020-Oct-19.33517759)
5.7017e-05 TDB
period 1673.002280228318
4.58
1.5196e-05
4.16e-08
d
yr
n .2151820139485226 1.9545e-09 deg/d
Q 3.442970313324126 2.0848e-08 au
  Orbit Determination Parameters
   # obs. used (total)      336  
   data-arc span      8026 days (21.97 yr)  
   first obs. used      1997-11-24  
   last obs. used      2019-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5412  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 16:45:10  

Additional Information
 Earth MOID = 1.09084 au 
 Jupiter MOID = 1.75551 au 
 T_jup = 3.284 
[ 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 16.1   n/a MPO494360  

249598 (1997 WB7)          Discovered 1997-Nov-24 by Spacewatch at Kitt Peak
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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