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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04063636590053673 4.566e-08  
a 2.858139651688052 1.9396e-08 au
q 2.741995243007223 1.344e-07 au
i 11.27772573155095 3.5983e-06 deg
node 255.2580103887151 2.3804e-05 deg
peri 90.19382744270332 5.0767e-05 deg
M 203.1563125860395 4.6013e-05 deg
tp 2460165.432359062090
(2023-Aug-08.93235906)
0.00022743 TDB
period 1764.91418830104
4.83
1.7966e-05
4.919e-08
d
yr
n .2039759226744881 2.0763e-09 deg/d
Q 2.97428406036888 2.0184e-08 au
  Orbit Determination Parameters
   # obs. used (total)      885  
   data-arc span      7915 days (21.67 yr)  
   first obs. used      1999-09-08  
   last obs. used      2021-05-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52903  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:53  

Additional Information
 Earth MOID = 1.76284 au 
 Jupiter MOID = 2.21632 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 14.80   n/a MPO637246  
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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