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109981 (2001 SF55)
Classification: Main-belt Asteroid          SPK-ID: 2109981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07044678045769209 3.2998e-08  
a 2.748519473366242 1.6425e-08 au
q 2.554895125442319 9.0875e-08 au
i 16.34590582125189 4.3403e-06 deg
node 178.2531644537056 1.2923e-05 deg
peri 92.98311440798258 3.3827e-05 deg
M 138.5383306507838 3.0656e-05 deg
tp 2458360.007418698241
(2018-Aug-29.50741870)
0.00014153 TDB
period 1664.357641567471
4.56
1.4919e-05
4.085e-08
d
yr
n .2162996648130004 1.9389e-09 deg/d
Q 2.942143821290165 1.7582e-08 au
  Orbit Determination Parameters
   # obs. used (total)      910  
   data-arc span      7555 days (20.68 yr)  
   first obs. used      1999-03-20  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54693  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 10:18:57  

Additional Information
 Earth MOID = 1.60434 au 
 Jupiter MOID = 2.17882 au 
 T_jup = 3.285 
[ 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 14.9   n/a MPO502758  
diameter diameter 2.924 km 0.452 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.299   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109981 (2001 SF55)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 SF55 = 1999 FL41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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