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66652 Borasisi (1999 RZ253)
Classification: TransNeptunian Object          SPK-ID: 2066652
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08461812178024095 0.00029617  
a 43.61616418741582 0.016615 AU
q 39.92544629461808 0.0031857 AU
i .5629392238502916 9.7214e-05 deg
node 84.58841626412521 0.021321 deg
peri 196.6924191899876 0.081715 deg
M 56.62434327219439 0.099422 deg
tp 2440251.555185800822
(1969-Jan-30.05518580)
19.949 JED
period 105213.0548247297
288.06
60.119
0.1646
d
yr
n .003421628623935592 1.9551e-06 deg/d
Q 47.30688208021355 0.018021 AU
  Orbit Determination Parameters
   # obs. used (total)      51  
   data-arc span      4790 days (13.11 yr)  
   first obs. used      1999-09-08  
   last obs. used      2012-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      3  
   fit RMS      .59611  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-06 08:58:37  

Additional Information
 Earth MOID = 38.9085 AU 
 T_jup = 5.889 
[ 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 5.9 mag n/a MPO253782  

66652 Borasisi           Discovered 1999 Sept. 8 by C. A. Trujillo, J. X. Luu and D. C. Jewitt at Mauna Kea.
Also named is (66652) I Pabu, discovered 2003 Apr. 23 by K. Noll, D. Stephens, W. Grundy and colleagues using the Hubble Space Telescope. Borasisi and Pabu are the mythical personifications of the sun and moon in the fictional cosmogony of Bokononism described in Kurt Vonnegut's novel Cat's Cradle: "Borasisi, the sun, held Pabu, the moon, in his arms and hoped that Pabu would bear him a fiery child. But poor Pabu gave birth to children that were cold, that did not burn... Then poor Pabu herself was cast away, and she went to live with her favorite child, which was Earth."
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070926/MPCPages.arcLast Updated: 2007-09-30
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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