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249655 (1999 TW317)
Classification: Main-belt Asteroid          SPK-ID: 2249655
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06435578189412876 7.2606e-08  
a 3.087455494872671 3.9114e-08 au
q 2.888759882436816 2.3453e-07 au
i 9.133128634698085 9.9771e-06 deg
node 355.9017738154097 3.8053e-05 deg
peri 50.50041271480437 8.2401e-05 deg
M 256.0290476025194 7.6368e-05 deg
tp 2459572.780578347513
(2021-Dec-24.28057835)
0.00042522 TDB
period 1981.524680253836
5.43
3.7655e-05
1.031e-07
d
yr
n .1816782821770777 3.4525e-09 deg/d
Q 3.286151107308526 4.1631e-08 au
  Orbit Determination Parameters
   # obs. used (total)      250  
   data-arc span      7166 days (19.62 yr)  
   first obs. used      1999-10-12  
   last obs. used      2019-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56287  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:25:56  

Additional Information
 Earth MOID = 1.90673 au 
 Jupiter MOID = 1.99416 au 
 T_jup = 3.203 
[ 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 15.5   n/a MPO437159  
diameter diameter 3.283 km 0.635 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.103   0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249655 (1999 TW317)          Discovered 1999-Oct-12 by Spacewatch at Kitt Peak
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Alternate Designations
 1999 TW317 = 2002 EX48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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