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249617 (1999 TP21)
Classification: Main-belt Asteroid          SPK-ID: 2249617
[ 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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393898907915415 7.2502e-08  
a 3.187995375331586 2.5283e-08 au
q 2.424821510587019 2.2785e-07 au
i 14.57436413353238 8.1013e-06 deg
node 48.17714346575207 2.3451e-05 deg
peri 338.6701638828473 2.6379e-05 deg
M 237.072441093088 1.3255e-05 deg
tp 2459710.440100443165
(2022-May-10.94010044)		 8.2352e-05 TDB
period 2079.097953560425
5.69		 2.4733e-05
6.772e-08		 d
yr
n .1731520149801048 2.0598e-09 deg/d
Q 3.951169240076154 3.1336e-08 au
   Orbit Determination Parameters
   # obs. used (total)      349  
   data-arc span      7510 days (20.56 yr)  
   first obs. used      1999-10-02  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:46:15  

Additional Information
 Earth MOID = 1.43648 au 
 Jupiter MOID = 1.51134 au 
 T_jup = 3.103 
[ 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 15.2   n/a MPO258025  
diameter diameter 6.906 km 0.298 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249617 (1999 TP21)          Discovered 1999-Oct-02 by Spacewatch at Kitt Peak
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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