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JPL Small-Body Database Browser
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266646 Zaphod (2008 SD209)
Classification: Main-belt Asteroid          SPK-ID: 2266646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380215140228078 5.1436e-08  
a 2.784645224084012 3.5169e-08 au
q 2.400304274239556 1.4006e-07 au
i 3.708227795480284 6.0943e-06 deg
node 69.73550341793448 0.00014646 deg
peri 188.0060798643456 0.0001508 deg
M 179.7995195679495 3.6096e-05 deg
tp 2457752.805703568979
(2016-Dec-30.30570357)
0.00017237 TDB
period 1697.278988556131
4.65
3.2154e-05
8.803e-08
d
yr
n .2121041987954206 4.0181e-09 deg/d
Q 3.168986173928469 4.0023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      205  
   data-arc span      6118 days (16.75 yr)  
   first obs. used      2002-03-05  
   last obs. used      2018-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65476  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:17:09  

Additional Information
 Earth MOID = 1.38498 au 
 Jupiter MOID = 1.88257 au 
 T_jup = 3.315 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO418415  

266646 Zaphod           Discovered 2008 Sept. 28 at the Astronomical Research Observatory, Charleston.
Zaphod Beeblebrox is the ex-Galactic President and confidence trickster in Douglas Adams' book The Hitchhiker's Guide to the Galaxy. Name suggested by M. Johnson and M. Kran.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121029/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 2008 SD209 = 2005 YK60 = 2007 HP17 = 2008 TS156 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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