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66654 (1999 SF12)
Classification: Main-belt Asteroid          SPK-ID: 2066654
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 .05478251719902133 3.4865e-08  
a 2.573677481232995 1.2871e-08 au
q 2.432684950352615 9.3612e-08 au
i 21.20962182541489 3.8984e-06 deg
node 271.4358434909553 9.9031e-06 deg
peri 269.0335827840876 5.1011e-05 deg
M 238.0975151139621 5.3795e-05 deg
tp 2459711.169204099161
(2022-May-11.66920410)
0.00022626 TDB
period 1508.098162622067
4.13
1.1313e-05
3.097e-08
d
yr
n .2387112516429853 1.7907e-09 deg/d
Q 2.714670012113376 1.3576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1731  
   data-arc span      7837 days (21.46 yr)  
   first obs. used      1999-09-22  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42122  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:24:01  

Additional Information
 Earth MOID = 1.51297 au 
 Jupiter MOID = 2.50076 au 
 T_jup = 3.331 
[ 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 13.97   n/a MPCxxxxx  
diameter diameter 4.815 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.288   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66654 (1999 SF12)          Discovered 1999-Sep-22 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SF12 = 2000 WO49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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