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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07183287934664717 3.36e-08  
a 2.32682490860175 8.1786e-09 au
q 2.159682375681387 7.857e-08 au
i 6.642568561516436 3.8369e-06 deg
node 154.1263360590591 2.9995e-05 deg
peri 356.4218055607354 3.931e-05 deg
M 132.8536129487658 2.5052e-05 deg
tp 2458522.073913275415
(2019-Feb-07.57391328)
9.0082e-05 TDB
period 1296.414808735922
3.55
6.8352e-06
1.871e-08
d
yr
n .277688898317214 1.4641e-09 deg/d
Q 2.493967441522112 8.7661e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      9722 days (26.62 yr)  
   first obs. used      1992-09-24  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49121  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:48:23  

Additional Information
 Earth MOID = 1.17036 au 
 Jupiter MOID = 2.48908 au 
 T_jup = 3.561 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456685.5 (2014-Jan-28.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07211108302494898 3.3499e-08  
q 2.157789273836945 7.8301e-08 au
tp 2457226.139606273772
(2015-Jul-22.63960627)
8.9645e-05 TDB
node 154.1792300168721 3.0019e-05 deg
peri 356.2345821890929 3.9283e-05 deg
i 6.640430533619214 3.8361e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      9722 days (26.62 yr)  
   first obs. used      1992-09-24  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49121  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:48:23  

Additional Information
 Jupiter MOID = 2.48908 au 
 T_jup = 3.561 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.122164752413308E-15 -2.610757144202245E-15 9.991495279463208E-13 -6.878207775142175E-15 2.903213273560265E-13 -4.264139443751559E-16
q -2.610757144202245E-15 6.131107275953461E-15 -2.343953828054729E-12 1.558205958915566E-14 -6.867208960191345E-13 1.088157109847367E-15
tp 9.991495279463208E-13 -2.343953828054729E-12 8.036142557130495E-9 -1.84108491070585E-11 2.281641538662332E-9 -1.573821555655376E-12
node -6.878207775142175E-15 1.558205958915566E-14 -1.84108491070585E-11 9.011239079905689E-10 -8.999296556573621E-10 3.601320211637379E-11
peri 2.903213273560265E-13 -6.867208960191345E-13 2.281641538662332E-9 -8.999296556573621E-10 1.543159504003339E-9 -3.622948445788885E-11
i -4.264139443751559E-16 1.088157109847367E-15 -1.573821555655376E-12 3.601320211637379E-11 -3.622948445788885E-11 1.471594723204038E-11

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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