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JPL Small-Body Database Browser
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91856 (1999 UB13)
Classification: Main-belt Asteroid          SPK-ID: 2091856
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338654340277002 4.6765e-08  
a 2.761224385626428 1.8937e-08 au
q 2.391591884796676 1.3163e-07 au
i 15.5061183943735 5.3535e-06 deg
node 209.3235093050502 1.7476e-05 deg
peri 159.5143467722676 2.4653e-05 deg
M 179.5241066440358 1.9426e-05 deg
tp 2458164.759880960096
(2018-Feb-15.25988096)
8.7322e-05 TDB
period 1675.911098953022
4.59
1.7241e-05
4.72e-08
d
yr
n .2148085302525294 2.2098e-09 deg/d
Q 3.130856886456179 2.1472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      588  
   data-arc span      7125 days (19.51 yr)  
   first obs. used      1999-07-22  
   last obs. used      2019-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54793  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:33:03  

Additional Information
 Earth MOID = 1.39819 au 
 Jupiter MOID = 2.3508 au 
 T_jup = 3.276 
[ 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 MPO426571  
diameter diameter 6.989 km 0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91856 (1999 UB13)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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