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91870 (1999 UA39)
Classification: Main-belt Asteroid          SPK-ID: 2091870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400851721344878 5.549e-08  
a 2.847126645074014 1.6371e-08 au
q 2.448286418910134 1.582e-07 au
i 9.368862348489362 6.403e-06 deg
node .6147091596453507 2.3249e-05 deg
peri 325.5091344487444 2.7445e-05 deg
M 230.7158533810869 1.5913e-05 deg
tp 2460026.660791271141
(2023-Mar-23.16079127)
7.9527e-05 TDB
period 1754.723148897079
4.80
1.5134e-05
4.143e-08
d
yr
n .2051605691908014 1.7695e-09 deg/d
Q 3.245966871237894 1.8664e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1090  
   data-arc span      7933 days (21.72 yr)  
   first obs. used      1999-09-18  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54364  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:56  

Additional Information
 Earth MOID = 1.44325 au 
 Jupiter MOID = 2.14103 au 
 T_jup = 3.273 
[ 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 14.44   n/a MPO637247  
diameter diameter 5.110 km 0.281 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91870 (1999 UA39)          Discovered 1999-Oct-29 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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