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52872 Okyrhoe (1998 SG35)
Classification: Centaur          SPK-ID: 2052872
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3063972682272846 2.8793e-07  
a 8.351301933253275 2.6489e-06 au
q 5.79248583476323 8.0877e-07 au
i 15.66535375466712 1.0208e-05 deg
node 173.0259048357945 3.1906e-05 deg
peri 337.8658530024314 3.7782e-05 deg
M 127.0072497436036 5.78e-05 deg
tp 2454490.533463016655
0.00036406 JED
period 8815.149966432442
n .04083878338665346 1.943e-08 deg/d
Q 10.91011803174332 3.4605e-06 au
  Orbit Determination Parameters
   # obs. used (total)      507  
   data-arc span      5393 days (14.77 yr)  
   first obs. used      1998-09-13  
   last obs. used      2013-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52886  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 08:27:10  

Additional Information
 Earth MOID = 4.80792 au 
 Jupiter MOID = .472901 au 
 T_jup = 2.945 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.8 mag n/a MPO263768  
rotation period rot_per 9.72 h n/a LCDB (Rev. 2016-February); 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:
[Thirouin, A.; Ortiz, J.L.; Duffard, R.; Santos-Sanz, P.; et al. (2010) Astron. Astrophys. 522, A93.]

52872 Okyrhoe           Discovered 1998 Sept. 19 by Spacewatch at Kitt Peak.
Okyrhoe was the daughter of Chiron and Chariklo. The name means "swift running" or "fast flowing". A prophet, she was changed into a mare by the gods as punishment for revealing their plans to humankind.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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