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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3031642993934865 7.7076e-08  
a 8.373327452802455 6.8085e-07 au
q 5.834833501981352 5.7194e-07 au
i 15.64208940901725 5.6248e-06 deg
node 173.0766164757575 1.8365e-05 deg
peri 337.7321361355808 2.4109e-05 deg
M 192.5060514142173 3.3281e-05 deg
tp 2463318.081083693357
(2032-Mar-26.58108369)
0.0013087 TDB
period 8850.046241344817
24.23
0.0010794
2.955e-06
d
yr
n .04067775355999675 4.9614e-09 deg/d
Q 10.91182140362356 8.8726e-07 au
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1998-09-13  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50624  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:48:45  

Additional Information
 Earth MOID = 4.85125 au 
 Jupiter MOID = .505213 au 
 T_jup = 2.950 
[ 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 10.78   n/a E2021B10  
diameter diameter 36.000 km 1.200 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  
rotation period rot_per 9.72 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:
[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] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

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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