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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1301658620941938 4.6883e-08  
a 3.177285651546431 3.2554e-08 AU
q 2.763711525593378 1.4571e-07 AU
i 2.525915625386365 5.8478e-06 deg
node 69.43969276692947 0.0001319 deg
peri 215.8509903680688 0.00013427 deg
M 189.4584063745791 2.6244e-05 deg
tp 2457780.465158854469
(2017-Jan-26.96515885)
0.00015344 JED
period 2068.630002147595
5.66
3.1793e-05
8.704e-08
d
yr
n .1740282213959276 2.6746e-09 deg/d
Q 3.590859777499484 3.6792e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1249  
   data-arc span      13428 days (36.76 yr)  
   first obs. used      1977-06-12  
   last obs. used      2014-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4984  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:35:00  

Additional Information
 Earth MOID = 1.74723 AU 
 T_jup = 3.186 
[ 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 12.6 mag n/a MPO256912  

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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