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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336727707514909 5.008e-08  
a 2.625312879782375 1.1229e-08 au
q 2.274380033052289 1.3279e-07 au
i 5.615685419671036 3.6948e-06 deg
node 99.2350927099283 4.9683e-05 deg
peri 308.1653084127671 5.2459e-05 deg
M 115.1270270205515 1.488e-05 deg
tp 2458503.627661460074
(2019-Jan-20.12766146)
6.412e-05 TDB
period 1553.710249483314
4.25
9.9687e-06
2.729e-08
d
yr
n .2317034338414887 1.4866e-09 deg/d
Q 2.976245726512461 1.2731e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1495  
   data-arc span      10430 days (28.56 yr)  
   first obs. used      1991-05-18  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50506  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 05:39:23  

Additional Information
 Earth MOID = 1.28967 au 
 Jupiter MOID = 2.38727 au 
 T_jup = 3.383 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456470.5 (2013-Jun-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1315353476140075 4.9826e-08  
q 2.28125592530134 1.3183e-07 au
tp 2456948.109666200942
(2014-Oct-17.60966620)
6.6658e-05 TDB
node 99.34406824683279 4.9621e-05 deg
peri 307.9024800308628 5.2526e-05 deg
i 5.61716303757488 3.6947e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1495  
   data-arc span      10430 days (28.56 yr)  
   first obs. used      1991-05-18  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50506  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 05:39:23  

Additional Information
 Jupiter MOID = 2.38727 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.482621802983074E-15 -6.550789508537001E-15 -1.301169671319456E-12 -1.965998074980528E-14 -3.67363980678671E-13 -2.244025942754282E-15
q -6.550789508537001E-15 1.73789026646465E-14 3.312730041983944E-12 5.08156342034198E-14 9.313432840396267E-13 6.121267363088614E-15
tp -1.301169671319456E-12 3.312730041983944E-12 4.443231747157696E-9 9.298460622234004E-12 1.177939858705132E-9 4.407328562644158E-13
node -1.965998074980528E-14 5.08156342034198E-14 9.298460622234004E-12 2.462246592144372E-9 -2.44711113334772E-9 -5.127761699083425E-11
peri -3.67363980678671E-13 9.313432840396267E-13 1.177939858705132E-9 -2.44711113334772E-9 2.759013348217728E-9 5.118462220628607E-11
i -2.244025942754282E-15 6.121267363088614E-15 4.407328562644158E-13 -5.127761699083425E-11 5.118462220628607E-11 1.365054514751787E-11

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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