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6639 Marchis (1989 SO8)
Classification: Main-belt Asteroid          SPK-ID: 2006639
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1300473298627016 4.2094e-08  
a 3.169181430801393 2.8808e-08 au
q 2.757037847875216 1.3717e-07 au
i 2.520564364041717 4.8163e-06 deg
node 69.12678329667739 0.0001288 deg
peri 217.9618389217226 0.0001309 deg
M 291.9378137027148 2.6223e-05 deg
tp 2457790.103164226506
(2017-Feb-05.60316423)
0.00015157 JED
period 2060.720449221549
5.64
2.8098e-05
7.693e-08
d
yr
n .1746961845969901 2.382e-09 deg/d
Q 3.581325013727571 3.2555e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1429  
   data-arc span      13883 days (38.01 yr)  
   first obs. used      1977-06-12  
   last obs. used      2015-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49343  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:54:38  

Additional Information
 Earth MOID = 1.73953 au 
 Jupiter MOID = 1.5674 au 
 T_jup = 3.188 
[ 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 12.7 mag n/a MPO324369  

6639 Marchis           Discovered 1989 Sept. 25 by H. Debehogne at La Silla.
Franck Marchis (b. 1973) exploited the high-resolution capabilities offered by adaptive optics from ground-based telescopes to survey hundreds of main-belt minor planets and Trojans. In 2004 he led the team that discovered (87) Sylvia II (Remus), the only case where a main-belt object is known to have a second satellite.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070402/MPCPages.arcLast Updated: 2007-07-05

[ show close-approach data ]
Alternate Designations
 1989 SO8 = 1977 LZ 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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