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249496 (2009 WR249)
Classification: Main-belt Asteroid          SPK-ID: 2249496
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3163295637998507 1.0396e-07  
a 2.56545994118076 2.874e-08 au
q 1.75392911704106 2.7684e-07 au
i 33.34324501983504 1.4603e-05 deg
node 314.2544124431162 9.7945e-06 deg
peri 130.6182153515935 2.33e-05 deg
M 125.6920114653817 1.3563e-05 deg
tp 2458076.475660821615
(2017-Nov-18.97566082)
6.0793e-05 TDB
period 1500.881081501162
4.11
2.5221e-05
6.905e-08
d
yr
n .2398591097170287 4.0306e-09 deg/d
Q 3.37699076532046 3.7831e-08 au
  Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      6441 days (17.63 yr)  
   first obs. used      2000-09-22  
   last obs. used      2018-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45055  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 09:56:18  

Additional Information
 Earth MOID = .863973 au 
 Jupiter MOID = 2.05936 au 
 T_jup = 3.141 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO437159  
diameter diameter 2.294 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249496 (2009 WR249)          Discovered 2009-Nov-26 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

Alternate Designations
 2009 WR249 = 2000 ST45 = 2008 PJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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