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JPL Small-Body Database Browser
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91640 (1999 TA87)
Classification: Main-belt Asteroid          SPK-ID: 2091640
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09415862633417205 6.3791e-08  
a 3.019364391084349 3.5202e-08 au
q 2.735065187617533 1.9655e-07 au
i 1.757953920063098 1.0866e-05 deg
node 340.5370525081062 0.00027194 deg
peri 312.1388528621446 0.00027911 deg
M 35.88540205132102 6.5717e-05 deg
tp 2458809.476395467029
(2019-Nov-21.97639547)
0.00034858 TDB
period 1916.336273271261
5.25
3.3513e-05
9.175e-08
d
yr
n .1878584698422819 3.2853e-09 deg/d
Q 3.303663594551165 3.8516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      228  
   data-arc span      9490 days (25.98 yr)  
   first obs. used      1992-03-25  
   last obs. used      2018-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58971  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:49:54  

Additional Information
 Earth MOID = 1.71933 au 
 Jupiter MOID = 1.85212 au 
 T_jup = 3.239 
[ 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 15.8   n/a MPO436412  
diameter diameter 4.358 km 0.879 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.041   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

91640 (1999 TA87)          Discovered 1999-Oct-15 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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