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28107 Sapar (1998 SA13)
Classification: Main-belt Asteroid          SPK-ID: 2028107
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07976454241966906 1.2687e-08  
a 2.649456394740286 1.174e-08 au
q 2.438123717752962 3.916e-08 au
i 14.4948901669741 3.8719e-07 deg
node 291.9650651639277 3.2719e-06 deg
peri 325.295250583258 1.6644e-05 deg
M 260.518944226555 1.8354e-05 deg
tp 2459635.782769502108
(2022-Feb-25.28276950)
8.0514e-05 TDB
period 1575.192339912702
4.31
1.047e-05
2.867e-08
d
yr
n .228543518704485 1.5191e-09 deg/d
Q 2.860789071727612 1.2677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1881  
   data-arc span      23843 days (65.28 yr)  
   first obs. used      1955-12-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44765  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:09:57  

Additional Information
 Earth MOID = 1.43224 au 
 Jupiter MOID = 2.30168 au 
 T_jup = 3.341 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.77   n/a MPCxxxxx  
diameter diameter 4.511 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.315   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

28107 Sapar           Discovered 1998 Sept. 22 by L. Šarounová at Ondřejov.
Arved-Ervin Sapar (b. 1933) carried out pioneering studies of cosmology in Tartu, Estonia. He took into account the photon and neutrino background in cosmological equations. His contribution to modelling of stellar atmospheres has found acknowledgement among the astronomical community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120703/MPCPages.arcLast Updated: 2012-07-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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