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91820 (1999 TT268)
Classification: Main-belt Asteroid          SPK-ID: 2091820
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04034133584602494 4.6714e-08  
a 2.858761956513904 2.1977e-08 au
q 2.743435680322337 1.3587e-07 au
i 11.27846788587837 4.2925e-06 deg
node 255.2722130320098 2.4033e-05 deg
peri 89.95216079396977 5.9082e-05 deg
M 122.6514067753144 5.3127e-05 deg
tp 2458399.000250338283
(2018-Oct-07.50025034)
0.00026117 TDB
period 1765.490633751136
4.83
2.0358e-05
5.574e-08
d
yr
n .2039093230617193 2.3513e-09 deg/d
Q 2.974088232705471 2.2863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      720  
   data-arc span      7447 days (20.39 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:37:48  

Additional Information
 Earth MOID = 1.76487 au 
 Jupiter MOID = 2.21726 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 14.7   n/a MPO417452  
diameter diameter 5.715 km 0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91820 (1999 TT268)          Discovered 1999-Oct-03 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 TT268 = 1999 RA207 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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