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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308415725383716 4.9095e-08  
a 3.150433654018684 2.3339e-08 au
q 2.738225960549071 1.5318e-07 au
i 12.50541748221426 5.1335e-06 deg
node 82.6069307246979 2.0183e-05 deg
peri 309.5531185699949 2.611e-05 deg
M 251.7620836783522 1.9291e-05 deg
tp 2459614.588347164009
(2022-Feb-04.08834716)
0.00011328 TDB
period 2042.461759168478
5.59
2.2697e-05
6.214e-08
d
yr
n .1762578899624355 1.9587e-09 deg/d
Q 3.562641347488297 2.6393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      936  
   data-arc span      7271 days (19.91 yr)  
   first obs. used      1999-08-22  
   last obs. used      2019-07-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52409  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:37:27  

Additional Information
 Earth MOID = 1.76569 au 
 Jupiter MOID = 1.8867 au 
 T_jup = 3.158 
[ 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 MPO436413  
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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