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66938 (1999 WM8)
Classification: Main-belt Asteroid          SPK-ID: 2066938
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2811595632748945 6.7186e-08  
a 2.538143943568751 6.7481e-09 au
q 1.824520500866143 1.7307e-07 au
i 3.247611589298599 4.5657e-06 deg
node 335.910744242416 5.2991e-05 deg
peri 12.26920337418436 5.3458e-05 deg
M 113.7893038653663 4.8708e-06 deg
tp 2458733.656045736419
(2019-Sep-07.15604574)
1.9644e-05 TDB
period 1476.973826412889
4.04
5.8902e-06
1.613e-08
d
yr
n .2437416246395702 9.7204e-10 deg/d
Q 3.25176738627136 8.6454e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1330  
   data-arc span      9240 days (25.30 yr)  
   first obs. used      1995-11-24  
   last obs. used      2021-03-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53466  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:26:01  

Additional Information
 Earth MOID = .816359 au 
 Jupiter MOID = 2.18123 au 
 T_jup = 3.388 
[ 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 15.39   n/a MPCxxxxx  
diameter diameter 2.916 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.120   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66938 (1999 WM8)          Discovered 1999-Nov-29 by Donati, S. at Monte Agliale
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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