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JPL Small-Body Database Browser
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66176 (1998 WR4)
Classification: Inner Main-belt Asteroid          SPK-ID: 2066176
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374631755923844 3.2621e-08  
a 1.946255128564649 7.4279e-09 au
q 1.678716718079188 6.3819e-08 au
i 22.69858684873922 5.3451e-06 deg
node 204.1551047494584 9.5479e-06 deg
peri 269.5548433774054 2.0857e-05 deg
M 302.7292504942339 1.7456e-05 deg
tp 2459158.271461235894
(2020-Nov-04.77146124)
4.8032e-05 TDB
period 991.7405749893894
2.72
5.6775e-06
1.554e-08
d
yr
n .3629981560488756 2.0781e-09 deg/d
Q 2.21379353905011 8.449e-09 au
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      8715 days (23.86 yr)  
   first obs. used      1994-05-10  
   last obs. used      2018-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54485  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:00:41  

Additional Information
 Earth MOID = .831395 au 
 Jupiter MOID = 2.99283 au 
 T_jup = 3.791 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456755.5 (2014-Apr-08.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137063049709364 3.2603e-08  
q 1.679733190723043 6.3762e-08 au
tp 2457174.441776348977
(2015-May-31.94177635)
5.0168e-05 TDB
node 204.194760803061 9.5448e-06 deg
peri 269.4628729793854 2.0924e-05 deg
i 22.69944751729163 5.3454e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      8715 days (23.86 yr)  
   first obs. used      1994-05-10  
   last obs. used      2018-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54485  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:00:41  

Additional Information
 Jupiter MOID = 2.99283 au 
 T_jup = 3.791 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.062925243458595E-15 -2.068221799201042E-15 -4.575125387043111E-13 -2.857820170082753E-15 -1.57598743434277E-13 -1.125760555867231E-14
q -2.068221799201042E-15 4.065640198382698E-15 7.998590923060569E-13 5.30678721084439E-15 2.675069125940146E-13 2.209786946908887E-14
tp -4.575125387043111E-13 7.998590923060569E-13 2.516853384966613E-9 1.247086621285148E-11 9.409303461693058E-10 2.204452830047499E-11
node -2.857820170082753E-15 5.30678721084439E-15 1.247086621285148E-11 9.110247393207332E-11 -7.890703033208601E-11 1.53072573170329E-11
peri -1.57598743434277E-13 2.675069125940146E-13 9.409303461693058E-10 -7.890703033208601E-11 4.378093971411035E-10 -6.094087160171728E-12
i -1.125760555867231E-14 2.209786946908887E-14 2.204452830047499E-11 1.53072573170329E-11 -6.094087160171728E-12 2.857373777162314E-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 MPO436243  

66176 (1998 WR4)          Discovered 1998-Nov-18 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 WR4 = 1994 JM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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