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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0616156935255377 1.6009e-08  
a 2.369111926192803 6.9621e-09 au
q 2.223137451820811 3.7716e-08 au
i 6.938080638643391 3.7104e-07 deg
node 36.57603967252724 1.6045e-06 deg
peri 186.0588054093319 1.4984e-05 deg
M 112.6430789816427 1.3408e-05 deg
tp 2458783.746930182792
(2019-Oct-27.24693018)
4.9625e-05 TDB
period 1331.915875263363
3.65
5.8711e-06
1.607e-08
d
yr
n .2702873407292457 1.1914e-09 deg/d
Q 2.515086400564795 7.3911e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2452  
   data-arc span      13783 days (37.74 yr)  
   first obs. used      1983-04-11  
   last obs. used      2021-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43628  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 17:10:50  

Additional Information
 Earth MOID = 1.21344 au 
 Jupiter MOID = 2.45128 au 
 T_jup = 3.533 
[ 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 13.42   n/a E2021B10  
rotation period rot_per 48.260 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
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

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Alternate Designations
 1983 GR = 1983 JS = 1988 VA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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