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21208 (1994 PW29)
Classification: Main-belt Asteroid          SPK-ID: 2021208
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1283314611096833 2.959e-08  
a 2.93389404727217 1.482e-08 au
q 2.55738313744473 8.6191e-08 au
i 10.5423956096835 3.8853e-06 deg
node 183.6294295493623 1.9355e-05 deg
peri 211.9911545696909 2.5436e-05 deg
M 78.54816025166329 1.5747e-05 deg
tp 2458996.003631443288
(2020-May-26.50363144)
8.0964e-05 TDB
period 1835.545125671654
5.03
1.3907e-05
3.808e-08
d
yr
n .1961270224115414 1.486e-09 deg/d
Q 3.31040495709961 1.6721e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      9700 days (26.56 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51875  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:32  

Additional Information
 Earth MOID = 1.56893 au 
 Jupiter MOID = 2.1577 au 
 T_jup = 3.238 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457416.5 (2016-Jan-29.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278824459673991 2.9942e-08  
q 2.557462778438533 8.6913e-08 au
tp 2457148.153262811586
(2015-May-05.65326281)
8.5066e-05 TDB
node 183.7870122880874 1.9276e-05 deg
peri 209.687932131237 2.5449e-05 deg
i 10.56220785848391 3.8964e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      9700 days (26.56 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51875  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:32  

Additional Information
 Jupiter MOID = 2.1577 au 
 T_jup = 3.238 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.965499685256457E-16 -2.57537722946796E-15 -5.550338185366839E-13 -2.660090484108364E-15 -9.706583702659399E-14 -6.77340878091913E-16
q -2.57537722946796E-15 7.553813662125955E-15 1.266799896832445E-12 7.265679859895178E-15 2.19800845938404E-13 2.34876015114636E-15
tp -5.550338185366839E-13 1.266799896832445E-12 7.236147835360305E-9 7.962039710365722E-12 1.428951974172778E-9 -3.013594571480746E-12
node -2.660090484108364E-15 7.265679859895178E-15 7.962039710365722E-12 3.71581773080607E-10 -3.633101197285157E-10 -1.505985828627182E-11
peri -9.706583702659399E-14 2.19800845938404E-13 1.428951974172778E-9 -3.633101197285157E-10 6.47635128287895E-10 1.415041525632005E-11
i -6.77340878091913E-16 2.34876015114636E-15 -3.013594571480746E-12 -1.505985828627182E-11 1.415041525632005E-11 1.51817735511147E-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 14.24   n/a MPCxxxxx  

21208 (1994 PW29)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PW29 = 1997 GV26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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