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55887 (1997 WE37)
Classification: Main-belt Asteroid          SPK-ID: 2055887
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336728032236885 4.643e-08  
a 2.625312874162487 1.0033e-08 au
q 2.274379942933949 1.2148e-07 au
i 5.615688276591986 3.2995e-06 deg
node 99.23502027949455 4.4491e-05 deg
peri 308.165414593788 4.7448e-05 deg
M 115.127001106054 1.4844e-05 deg
tp 2458503.627774898912
(2019-Jan-20.12777490)
6.3863e-05 TDB
period 1553.710244494378
4.25
8.9069e-06
2.439e-08
d
yr
n .2317034345854843 1.3283e-09 deg/d
Q 2.976245805391025 1.1375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1711  
   data-arc span      10595 days (29.01 yr)  
   first obs. used      1991-05-18  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48805  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:01:49  

Additional Information
 Earth MOID = 1.28967 au 
 Jupiter MOID = 2.38727 au 
 T_jup = 3.383 
[ 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 14.5   n/a MPO459234  

55887 (1997 WE37)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WE37 = 2001 PE63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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