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91811 (1999 TL252)
Classification: Main-belt Asteroid          SPK-ID: 2091811
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1287601176172831 4.7137e-08  
a 3.149704673420108 2.3227e-08 au
q 2.744148329210828 1.4748e-07 au
i 12.47815477568634 4.9169e-06 deg
node 82.49498254107888 2.0172e-05 deg
peri 309.5293237908076 2.5529e-05 deg
M 321.4711215696648 1.7811e-05 deg
tp 2459615.017913633192
(2022-Feb-04.51791363)
0.00010223 TDB
period 2041.75289063208
5.59
2.2585e-05
6.183e-08
d
yr
n .1763190842788777 1.9504e-09 deg/d
Q 3.555261017629387 2.6218e-08 au
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      8022 days (21.96 yr)  
   first obs. used      1999-08-22  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:48  

Additional Information
 Earth MOID = 1.77088 au 
 Jupiter MOID = 1.89433 au 
 T_jup = 3.159 
[ 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 13.96   n/a MPCxxxxx  
diameter diameter 4.073 km 0.640 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.352   0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91811 (1999 TL252)          Discovered 1999-Oct-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 TL252 = 2000 AS98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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