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201758 (2003 WC26)
Classification: Main-belt Asteroid          SPK-ID: 2201758
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0530623975875046 4.9472e-08  
a 2.726329746461406 2.5935e-08 au
q 2.58166415350003 1.4309e-07 au
i 3.55157218831279 5.5042e-06 deg
node 86.58951615420571 9.9582e-05 deg
peri 189.0020553666083 0.00011923 deg
M 356.1752573435286 6.7574e-05 deg
tp 2459017.968906434455
(2020-Jun-17.46890643)
0.00030866 TDB
period 1644.242993907855
4.50
2.3462e-05
6.424e-08
d
yr
n .2189457405832649 3.1242e-09 deg/d
Q 2.870995339422782 2.7311e-08 au
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      8086 days (22.14 yr)  
   first obs. used      1997-04-08  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 00:09:42  

Additional Information
 Earth MOID = 1.56536 au 
 Jupiter MOID = 2.1775 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457047.5 (2015-Jan-25.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .051364561491476 4.9483e-08  
q 2.584517481935987 1.4277e-07 au
tp 2457375.837636091422
(2015-Dec-19.33763609)
0.00031646 TDB
node 86.5971327239024 9.9586e-05 deg
peri 189.2073529969136 0.0001204 deg
i 3.552042821562174 5.5056e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      8086 days (22.14 yr)  
   first obs. used      1997-04-08  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 00:09:42  

Additional Information
 Jupiter MOID = 2.1775 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.448601528314363E-15 -6.963953993446596E-15 -4.341045235628646E-12 -9.774652879329448E-15 -8.697232303217298E-13 -3.2215735771488E-16
q -6.963953993446596E-15 2.038422265820785E-14 1.206457221216336E-11 2.514750031856625E-14 2.387568861452227E-12 1.430006006409452E-15
tp -4.341045235628646E-12 1.206457221216336E-11 1.001481272607948E-7 3.551767541857147E-11 2.145920443712602E-8 4.756375482421566E-12
node -9.774652879329448E-15 2.514750031856625E-14 3.551767541857147E-11 9.917280184838809E-9 -9.890779975630037E-9 -1.234877864941474E-10
peri -8.697232303217298E-13 2.387568861452227E-12 2.145920443712602E-8 -9.890779975630037E-9 1.449682999574463E-8 1.242529423065273E-10
i -3.2215735771488E-16 1.430006006409452E-15 4.756375482421566E-12 -1.234877864941474E-10 1.242529423065273E-10 3.031156415441422E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO433322  
rotation period rot_per 8.50 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

201758 (2003 WC26)          Discovered 2003-Nov-21 by Schwartz, M., Holvorcem, P. R. at Nogales
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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