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428694 Saule (2008 OS9)
Classification: Apollo [NEO]          SPK-ID: 2428694
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6478118964928868 8.1092e-08  
a 1.601561104458681 1.7171e-08 au
q .5640507680300606 1.279e-07 au
i 19.140048486612 1.3066e-05 deg
node 133.4162970961591 9.0036e-06 deg
peri 288.3265714427877 1.474e-05 deg
M 5.612822412363314 2.8856e-05 deg
tp 2459188.957696303892
(2020-Dec-05.45769630)
5.9161e-05 TDB
period 740.3101372753742
2.03
1.1906e-05
3.26e-08
d
yr
n .4862826832615562 7.8203e-09 deg/d
Q 2.639071440887303 2.8294e-08 au
  Orbit Determination Parameters
   # obs. used (total)      571  
   data-arc span      4580 days (12.54 yr)  
   first obs. used      2008-07-25  
   last obs. used      2021-02-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35301  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-08 05:25:07  

Additional Information
 Earth MOID = .0579153 au 
 Jupiter MOID = 2.9333 au 
 T_jup = 4.047 
[ 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 19.4   n/a MPO241936  
rotation period rot_per 8.430 h n/a LCDB (Rev. 2020-October); 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:
[Cernis, K.; Eglitis, I.; Wlodarczyk, I.; Zdanavicius, J.; Zdanavicius, K. (2010) Baltic Astronomy 19, 235-263.]

428694 Saule (2008 OS9)          Discovered 2008-Jul-29 by Cernis, K., Eglitis, I. at Baldone
Reference: Last Updated: 2015-03-09

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