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85731 (1998 SP80)
Classification: Main-belt Asteroid          SPK-ID: 2085731
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1813942322900803 3.4584e-08  
a 2.279780730939822 9.6545e-09 au
q 1.866241655461275 8.0924e-08 au
i 4.594406143299491 3.8532e-06 deg
node 243.7617591874406 5.3143e-05 deg
peri 128.3343416390096 5.4712e-05 deg
M 100.9710750127184 1.4686e-05 deg
tp 2458647.859227565890
(2019-Jun-13.35922757)
4.9971e-05 TDB
period 1257.297479107645
3.44
7.9867e-06
2.187e-08
d
yr
n .2863284194727779 1.8188e-09 deg/d
Q 2.693319806418369 1.1406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      810  
   data-arc span      7920 days (21.68 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-05-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:59  

Additional Information
 Earth MOID = .87095 au 
 Jupiter MOID = 2.78838 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456941.5 (2014-Oct-11.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1822806699892834 3.4758e-08  
q 1.86368363798251 8.1399e-08 au
tp 2457389.207193956941
(2016-Jan-01.70719396)
4.5289e-05 TDB
node 243.8278558764482 5.3232e-05 deg
peri 127.9749774200421 5.4761e-05 deg
i 4.59014736692489 3.851e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      810  
   data-arc span      7920 days (21.68 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-05-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:59  

Additional Information
 Jupiter MOID = 2.78838 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.208096108745556E-15 -2.816489550690296E-15 -3.465939418593911E-13 3.507581784766979E-15 -1.066321590332322E-13 -2.77336810550934E-16
q -2.816489550690296E-15 6.625722510991329E-15 9.569787348966622E-13 -8.363304804183621E-15 2.844021509382585E-13 8.731905331794125E-16
tp -3.465939418593911E-13 9.569787348966622E-13 2.051063666030415E-9 -1.256307092193473E-11 5.976544126610794E-10 7.677702490148292E-13
node 3.507581784766979E-15 -8.363304804183621E-15 -1.256307092193473E-11 2.833668874747457E-9 -2.827940518388175E-9 2.224809096031377E-11
peri -1.066321590332322E-13 2.844021509382585E-13 5.976544126610794E-10 -2.827940518388175E-9 2.998756874003147E-9 -2.198685075041425E-11
i -2.77336810550934E-16 8.731905331794125E-16 7.677702490148292E-13 2.224809096031377E-11 -2.198685075041425E-11 1.483039005820521E-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 15.7   n/a MPO344892  
diameter diameter 2.721 km 0.949 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.104   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85731 (1998 SP80)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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