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66776 (1999 TA221)
Classification: Main-belt Asteroid          SPK-ID: 2066776
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1024252731742901 5.8394e-08  
a 2.577646340826314 2.2284e-08 au
q 2.31363021022047 1.5915e-07 au
i 14.08664029504356 8.6827e-06 deg
node 304.303156649777 1.7828e-05 deg
peri 311.3736795386538 4.6256e-05 deg
M 91.10806711952212 3.9917e-05 deg
tp 2458617.950397102723
(2019-May-14.45039710)
0.00016754 TDB
period 1511.587956995637
4.14
1.9602e-05
5.367e-08
d
yr
n .238160140356979 3.0884e-09 deg/d
Q 2.841662471432159 2.4566e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      1999-09-08  
   last obs. used      2018-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53803  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:57:52  

Additional Information
 Earth MOID = 1.32114 au 
 Jupiter MOID = 2.35848 au 
 T_jup = 3.377 
[ 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 15.1   n/a MPO257300  
diameter diameter 2.852 km 0.691 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.198   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66776 (1999 TA221)          Discovered 1999-Oct-02 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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