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4993 Cossard (1983 GR)
Classification: Main-belt Asteroid          SPK-ID: 2004993
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06164163180876789 6.9565e-08  
a 2.368588088409815 1.422e-08 AU
q 2.222584453557424 1.6463e-07 AU
i 6.939806139946044 7.7659e-06 deg
node 36.69164905705875 4.3767e-05 deg
peri 186.0137927227164 6.5254e-05 deg
M 184.0337738454455 5.0755e-05 deg
tp 2457451.318002367380
(2016-Mar-03.81800237)
0.00018816 JED
period 1331.474146899483
3.65
1.199e-05
3.283e-08
d
yr
n .2703770109530917 2.4348e-09 deg/d
Q 2.514591723262206 1.5096e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1192  
   data-arc span      11229 days (30.74 yr)  
   first obs. used      1983-04-11  
   last obs. used      2014-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50872  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jan-21 22:40:44  

Additional Information
 Earth MOID = 1.21428 AU 
 T_jup = 3.534 
[ 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 13.2 mag n/a MPO267728  
SMASSII spectral type spec_B V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4993 Cossard           Discovered 1983 Apr. 11 by H. Debehogne and G. De Sanctis at the European Southern Observatory.
Italian archeoastronomer Guido Cossard (b. 1958) made a big contribution to the study of megalithic sites located in Valle d´Aosta, in particular on the interpretation of several engravings with astronomical meanings found there. Of particular importance is his work on the Coligny calendar dating back the Celtic period.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

[ show close-approach data ]
Alternate Designations
 1983 GR = 1983 JS = 1988 VA3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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