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JPL Small-Body Database Browser
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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04034133641703991 4.7446e-08  
a 2.858761956220091 2.2279e-08 au
q 2.743435678407981 1.3858e-07 au
i 11.27846789958526 4.2926e-06 deg
node 255.2722108163442 2.4566e-05 deg
peri 89.95216325307302 5.9345e-05 deg
M 122.651406557297 5.3131e-05 deg
tp 2458399.000251500201
(2018-Oct-07.50025150)
0.00026121 TDB
period 1765.49063347896
4.83
2.0638e-05
5.65e-08
d
yr
n .203909323093155 2.3836e-09 deg/d
Q 2.9740882340322 2.3177e-08 au
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      7424 days (20.33 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:04:49  

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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