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356986 (1997 SA4)
Classification: Main-belt Asteroid          SPK-ID: 2356986
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2299688145392898 5.469e-08  
a 2.245909807915134 1.1351e-08 au
q 1.729420591826726 1.2705e-07 au
i 10.53000012474329 6.669e-06 deg
node 14.14132307267358 2.8287e-05 deg
peri 323.9829795720926 3.1478e-05 deg
M 43.0021068983708 1.3985e-05 deg
tp 2459249.649940055930
(2021-Feb-04.14994006)
4.7206e-05 TDB
period 1229.382125503907
3.37
9.3204e-06
2.552e-08
d
yr
n .2928300261828201 2.2201e-09 deg/d
Q 2.762399024003541 1.3962e-08 au
  Orbit Determination Parameters
   # obs. used (total)      240  
   data-arc span      8832 days (24.18 yr)  
   first obs. used      1996-03-20  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58682  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 09:18:56  

Additional Information
 Earth MOID = .733001 au 
 Jupiter MOID = 2.66833 au 
 T_jup = 3.574 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457251.5 (2015-Aug-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2298422598976305 5.4633e-08  
q 1.7303239653335 1.2685e-07 au
tp 2456789.157542333388
(2014-May-11.65754233)
4.1494e-05 TDB
node 14.20275085304012 2.8327e-05 deg
peri 323.7798112755284 3.1507e-05 deg
i 10.52281078276882 6.6621e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      240  
   data-arc span      8832 days (24.18 yr)  
   first obs. used      1996-03-20  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58682  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 09:18:56  

Additional Information
 Jupiter MOID = 2.66833 au 
 T_jup = 3.574 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.984761800758256E-15 -6.917060785580989E-15 2.691184459312962E-13 -5.932179506628429E-15 1.020327343982698E-13 -1.312817249176977E-14
q -6.917060785580989E-15 1.609127463734304E-14 -5.571814452003613E-13 1.374612867317506E-14 -2.086384522430372E-13 3.08077639054246E-14
tp 2.691184459312962E-13 -5.571814452003613E-13 1.721793004657622E-9 1.072122632336415E-11 5.874660815732682E-10 -1.115623467155086E-12
node -5.932179506628429E-15 1.374612867317506E-14 1.072122632336415E-11 8.024034610799472E-10 -7.845757946922872E-10 2.650789456997317E-11
peri 1.020327343982698E-13 -2.086384522430372E-13 5.874660815732682E-10 -7.845757946922872E-10 9.926893892118015E-10 -2.639252195396609E-11
i -1.312817249176977E-14 3.08077639054246E-14 -1.115623467155086E-12 2.650789456997317E-11 -2.639252195396609E-11 4.438414004566493E-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 16.91   n/a E2021B25  

356986 (1997 SA4)          Discovered 1997-Sep-26 by Pravec, P. at Ondrejov
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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