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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09378088016313735 5.7599e-08  
a 3.018755699692815 2.3459e-08 au
q 2.735654133178135 1.6669e-07 au
i 1.75809587273341 1.0278e-05 deg
node 340.5377296531459 0.00018557 deg
peri 312.0974529991657 0.0001946 deg
M 110.3691641173881 5.7546e-05 deg
tp 2458809.165338216401
(2019-Nov-21.66533822)
0.00030585 TDB
period 1915.756814260262
5.25
2.2331e-05
6.114e-08
d
yr
n .187915291398302 2.1905e-09 deg/d
Q 3.301857266207494 2.5659e-08 au
  Orbit Determination Parameters
   # obs. used (total)      338  
   data-arc span      10513 days (28.78 yr)  
   first obs. used      1992-03-25  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54204  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:53:23  

Additional Information
 Earth MOID = 1.71953 au 
 Jupiter MOID = 1.85136 au 
 T_jup = 3.240 
[ 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 15.88   n/a E2021B10  
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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