Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
28107 Sapar (1998 SA13)
Classification: Main-belt Asteroid          SPK-ID: 2028107
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07983949411081045 3.3186e-08  
a 2.649570595128588 1.3071e-08 au
q 2.438030219202643 8.7767e-08 au
i 14.49529236732053 4.2979e-06 deg
node 291.9656314678318 1.8038e-05 deg
peri 325.2176757971443 3.6934e-05 deg
M 214.9037101552933 3.2672e-05 deg
tp 2459635.414837960934
(2022-Feb-24.91483796)
0.0001428 TDB
period 1575.294185058549
4.31
1.1657e-05
3.192e-08
d
yr
n .2285287430211773 1.6911e-09 deg/d
Q 2.861110971054533 1.4115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1625  
   data-arc span      23682 days (64.84 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-10-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4616  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:19:26  

Additional Information
 Earth MOID = 1.43399 au 
 Jupiter MOID = 2.30222 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 13.7   n/a MPO452564  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 13:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin