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20035 (1992 SA4)
Classification: Main-belt Asteroid          SPK-ID: 2020035
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 .07183292127750304 3.1781e-08  
a 2.326824911164425 7.5624e-09 au
q 2.159682280494218 7.3378e-08 au
i 6.642567962588692 3.5049e-06 deg
node 154.1263639540389 2.7203e-05 deg
peri 356.4217513599451 3.5326e-05 deg
M 132.8536401348873 2.3002e-05 deg
tp 2458522.073814583672
(2019-Feb-07.57381458)
8.2362e-05 TDB
period 1296.414810877655
3.55
6.3202e-06
1.73e-08
d
yr
n .2776888978584601 1.3538e-09 deg/d
Q 2.493967541834632 8.1056e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1858  
   data-arc span      10178 days (27.87 yr)  
   first obs. used      1992-09-24  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47447  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:32:18  

Additional Information
 Earth MOID = 1.17036 au 
 Jupiter MOID = 2.48908 au 
 T_jup = 3.561 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO474029  
diameter diameter 2.682 km 0.506 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.58 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.427   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20035 (1992 SA4)          Discovered 1992-Sep-24 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1992 SA4 = 1998 HD105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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