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7886 Redman (1993 PE)
Classification: Main-belt Asteroid          SPK-ID: 2007886
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09935044882002254 3.8964e-08  
a 2.381477724098322 7.2137e-09 au
q 2.144876843354268 9.2567e-08 au
i 3.928880842885374 3.2869e-06 deg
node 266.86090649891 6.1219e-05 deg
peri 77.58239037508352 6.3735e-05 deg
M 85.7421822910251 1.6621e-05 deg
tp 2458680.787037811366
6.2063e-05 TDB
period 1342.357557418452
n .2681848796622653 1.2185e-09 deg/d
Q 2.618078604842377 7.9304e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1987  
   data-arc span      25467 days (69.72 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50937  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:24:54  

Additional Information
 Earth MOID = 1.14118 au 
 Jupiter MOID = 2.71207 au 
 T_jup = 3.528 
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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 14.1   n/a MPO347589  
diameter diameter 4.381 km 0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.121   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7886 Redman           Discovered 1993 Aug. 12 by D. D. Balam at Climenhaga Observatory, University of Victoria.
Named in memory of Roderick Oliver Redman (1905-1975), professor of astronomy and longtime director of the University of Cambridge Observatories, and in honor of Russell Ormond Redman (b. 1951), a radio astronomer on the staff of the Dominion Astrophysical Observatory. The senior Redman established a lifelong association with the DAO when he obtained the observational material for his doctoral thesis there; he became renowned for his superlative observational techniques and designs for astronomical instrumentation. The junior Redman, whose association with the DAO began as a summer student assistant in 1970, has pioneered the study of minor planets at submillimeter wavelengths and is an authority in using the thermal emission spectra to study their surfaces. Citation prepared by P. A. Feldman at the request of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17

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