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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2399750716926216 7.2365e-08  
a 3.185884962600126 2.5651e-08 au
q 2.421351990295716 2.2676e-07 au
i 14.58097998835911 8.1151e-06 deg
node 48.17698537686055 2.3527e-05 deg
peri 338.8153292428493 2.6486e-05 deg
M 167.5768271382352 1.2753e-05 deg
tp 2457633.659076548092
(2016-Sep-02.15907655)
6.7302e-05 TDB
period 2077.03379033169
5.69
2.5084e-05
6.868e-08
d
yr
n .1733240940401408 2.0932e-09 deg/d
Q 3.950417934904536 3.1806e-08 au
  Orbit Determination Parameters
   # obs. used (total)      344  
   data-arc span      7178 days (19.65 yr)  
   first obs. used      1999-10-02  
   last obs. used      2019-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56732  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:53  

Additional Information
 Earth MOID = 1.43232 au 
 Jupiter MOID = 1.50917 au 
 T_jup = 3.104 
[ 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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