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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3152465824008087 9.516e-08  
a 2.567394654953841 2.3341e-08 au
q 1.758032264305539 2.5084e-07 au
i 33.38826145786113 1.3563e-05 deg
node 314.1607073683058 9.1403e-06 deg
peri 130.7893913233129 1.5947e-05 deg
M 221.4175090940928 1.0779e-05 deg
tp 2459578.919916358376
(2021-Dec-30.41991636)
4.572e-05 TDB
period 1502.579211326179
4.11
2.049e-05
5.61e-08
d
yr
n .2395880345517781 3.2672e-09 deg/d
Q 3.376757045602142 3.0699e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7293 days (19.97 yr)  
   first obs. used      2000-09-22  
   last obs. used      2020-09-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:17:24  

Additional Information
 Earth MOID = .867146 au 
 Jupiter MOID = 2.05569 au 
 T_jup = 3.140 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457825.5 (2017-Mar-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3167448955678706 9.5045e-08  
q 1.752617092998824 2.5058e-07 au
tp 2458076.517992072542
(2017-Nov-19.01799207)
4.5783e-05 TDB
node 314.2829861617444 9.1975e-06 deg
peri 130.5520703674703 1.5841e-05 deg
i 33.34560004516881 1.3573e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7293 days (19.97 yr)  
   first obs. used      2000-09-22  
   last obs. used      2020-09-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:17:24  

Additional Information
 Jupiter MOID = 2.05569 au 
 T_jup = 3.140 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.033581924570621E-15 -2.377616852760624E-14 3.593548216259003E-12 5.210238526840155E-14 1.033805590374006E-12 -3.61782350466288E-13
q -2.377616852760624E-14 6.279075476590179E-14 -9.415694247407534E-12 -1.34462492301838E-13 -2.729209465728022E-12 9.517310613206753E-13
tp 3.593548216259003E-12 -9.415694247407534E-12 2.096048704340341E-9 2.511675244006922E-11 6.087692247311111E-10 -1.585405645074721E-10
node 5.210238526840155E-14 -1.34462492301838E-13 2.511675244006922E-11 8.459327323797478E-11 -6.274878551694477E-11 -7.265558903588664E-11
peri 1.033805590374006E-12 -2.729209465728022E-12 6.087692247311111E-10 -6.274878551694477E-11 2.509234275372176E-10 1.323642944402595E-11
i -3.61782350466288E-13 9.517310613206753E-13 -1.585405645074721E-10 -7.265558903588664E-11 1.323642944402595E-11 1.842265834855612E-10

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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