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66942 (1999 WR12)
Classification: Main-belt Asteroid          SPK-ID: 2066942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2272659494863475 3.958e-08  
a 2.7385904042739 1.2358e-08 au
q 2.116202055792392 1.0869e-07 au
i 1.635130004346423 5.2617e-06 deg
node 203.280535542445 0.00014565 deg
peri 210.2002981088678 0.00014608 deg
M 219.5557386784387 1.2207e-05 deg
tp 2459846.288857656241
(2022-Sep-23.78885766)
5.8486e-05 TDB
period 1655.34701502649
4.53
1.1204e-05
3.067e-08
d
yr
n .21747705872671 1.472e-09 deg/d
Q 3.360978752755407 1.5166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      666  
   data-arc span      10846 days (29.69 yr)  
   first obs. used      1990-10-14  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52858  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:26:03  

Additional Information
 Earth MOID = 1.12687 au 
 Jupiter MOID = 2.01378 au 
 T_jup = 3.312 
[ 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 15.54   n/a E2021B10  
diameter diameter 3.553 km 0.865 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.097   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66942 (1999 WR12)          Discovered 1999-Nov-29 by Spacewatch at Kitt Peak
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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