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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05488104794281585 5.1031e-08  
a 2.573270913720062 1.7156e-08 au
q 2.432047109334337 1.2683e-07 au
i 21.21012216010519 5.636e-06 deg
node 271.4335180712246 1.4352e-05 deg
peri 269.1909617176011 5.9682e-05 deg
M 190.1853524772268 5.9458e-05 deg
tp 2459711.712434057074
(2022-May-12.21243406)
0.00024824 TDB
period 1507.74082209964
4.13
1.5078e-05
4.128e-08
d
yr
n .2387678271512697 2.3878e-09 deg/d
Q 2.714494718105786 1.8098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1172  
   data-arc span      7307 days (20.01 yr)  
   first obs. used      1999-09-22  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46167  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 07:51:23  

Additional Information
 Earth MOID = 1.51345 au 
 Jupiter MOID = 2.50168 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 13.9   n/a MPO449423  
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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