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JPL Small-Body Database Browser
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6948 Gounelle (1981 ET22)
Classification: Main-belt Asteroid          SPK-ID: 2006948
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159729397792261 4.1233e-08  
a 2.39474436609632 7.7297e-09 au
q 2.012233290633345 9.7893e-08 au
i 2.583839963449191 5.0665e-06 deg
node 26.3748926278047 0.00010038 deg
peri 90.87435784214988 0.00010181 deg
M 249.1194608641256 1.6136e-05 deg
tp 2459417.407775873643
(2021-Jul-21.90777587)
6.1015e-05 TDB
period 1353.590093303867
3.71
6.5536e-06
1.794e-08
d
yr
n .2659593933059198 1.2877e-09 deg/d
Q 2.777255441559294 8.9643e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1463  
   data-arc span      24652 days (67.49 yr)  
   first obs. used      1950-12-09  
   last obs. used      2018-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47448  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 16:33:41  

Additional Information
 Earth MOID = 1.03042 au 
 Jupiter MOID = 2.30977 au 
 T_jup = 3.511 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO448983  
diameter diameter 3.626 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6948 Gounelle           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Matthieu Gounelle (b. 1971) is curator of meteorites at Muséum National d´Histoire Naturelle in Paris. His research encompasses both physical and theoretical studies focused on the evolution of the early solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

Alternate Designations
 1981 ET22 = 1990 QL7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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