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JPL Small-Body Database Browser
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52872 Okyrhoe (1998 SG35)
Classification: Centaur          SPK-ID: 2052872
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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3040753676209626 1.4706e-07  
a 8.367248898665796 1.1094e-06 au
q 5.822974613827899 7.7122e-07 au
i 15.65368799479205 8.7501e-06 deg
node 173.0584513595325 3.1681e-05 deg
peri 337.9508578091545 3.5401e-05 deg
M 167.7252762321701 4.215e-05 deg
tp 2454481.721150041380
0.00033614 TDB
period 8840.411053684145
n .04072208835243853 8.0993e-09 deg/d
Q 10.91152318350369 1.4468e-06 au
  Orbit Determination Parameters
   # obs. used (total)      537  
   data-arc span      7279 days (19.93 yr)  
   first obs. used      1998-09-13  
   last obs. used      2018-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5184  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:04:07  

Additional Information
 Earth MOID = 4.83989 au 
 Jupiter MOID = .496234 au 
 T_jup = 2.948 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.8   n/a MPO263768  
diameter diameter 36.000 km 1.200 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (  
rotation period rot_per 9.72 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.058   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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