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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06641501325089133 7.5013e-08  
a 3.084211769993277 3.7861e-08 au
q 2.879373804420618 2.417e-07 au
i 9.133277857502129 1.0946e-05 deg
node 356.1692333552281 3.8664e-05 deg
peri 49.79156625266752 8.5343e-05 deg
M 183.9419934484066 7.7617e-05 deg
tp 2459568.037912316046
(2021-Dec-19.53791232)
0.00043383 TDB
period 1978.402773359267
5.42
3.6429e-05
9.974e-08
d
yr
n .1819649693417741 3.3506e-09 deg/d
Q 3.289049735565935 4.0375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      246  
   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      .56299  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:55  

Additional Information
 Earth MOID = 1.89649 au 
 Jupiter MOID = 2.00323 au 
 T_jup = 3.204 
[ 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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