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JPL Small-Body Database Browser
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66652 Borasisi (1999 RZ253)
Classification: TransNeptunian Object          SPK-ID: 2066652
Ephemeris | Orbit Diagram | Orbital Elements | 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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09061861670389074 2.0767e-05  
a 43.83314766203852 0.0019172 au
q 39.86104845512721 0.001043 au
i .5634675413370971 1.6134e-05 deg
node 85.07178599394217 0.0084824 deg
peri 197.4146685765039 0.019688 deg
M 61.03218035109026 0.018037 deg
tp 2440630.056346454210
4.1698 TDB
period 105999.1577895663
n .003396253399623101 2.2282e-07 deg/d
Q 47.80524686894983 0.0020909 au
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      5797 days (15.87 yr)  
   first obs. used      1999-09-08  
   last obs. used      2015-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .59624  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 17:07:33  

Additional Information
 Earth MOID = 38.844 au 
 Jupiter MOID = 34.6479 au 
 T_jup = 5.899 
[ 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   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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