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8455 Johnrayner (1981 ER6)
Classification: Main-belt Asteroid          SPK-ID: 2008455
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1921196870265199 7.9633e-08  
a 2.639760057701818 1.5049e-08 AU
q 2.132610181591037 2.1306e-07 AU
i 5.147208322581514 6.7096e-06 deg
node 271.6899061124664 7.8735e-05 deg
peri 233.1108898659153 8.143e-05 deg
M 333.2754800118943 1.6635e-05 deg
tp 2457116.792717562720
(2015-Apr-04.29271756)
7.2389e-05 JED
period 1566.553050951418
4.29
1.3396e-05
3.668e-08
d
yr
n .2298038995751599 1.9651e-09 deg/d
Q 3.1469099338126 1.794e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      891  
   data-arc span      12970 days (35.51 yr)  
   first obs. used      1979-10-18  
   last obs. used      2015-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48834  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:01:42  

Additional Information
 Earth MOID = 1.15023 AU 
 T_jup = 3.364 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO337327  

8455 Johnrayner           Discovered 1981 Mar. 6 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
John T. Rayner (b. 1954) is an astronomer at the University of Hawaii's Institute for Astronomy and Deputy Director of the NASA Infrared Telescope Facility. He led the effort to design and build SpeX, an instrument that has played a key role in the spectroscopic studies of minor planets for over a decade.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1981 ER6 = 1985 CT1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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