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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1300013059549098 4.0384e-08  
a 3.168233033512938 2.6481e-08 au
q 2.756358601586771 1.3424e-07 au
i 2.520733923653249 4.7315e-06 deg
node 69.12436691299497 0.00012373 deg
peri 218.101082014137 0.00012572 deg
M 326.7610473940663 2.4269e-05 deg
tp 2457790.681791052875
(2017-Feb-06.18179105)
0.00013927 JED
period 2059.795493279554
5.64
2.5825e-05
7.07e-08
d
yr
n .1747746323237251 2.1912e-09 deg/d
Q 3.580107465439106 2.9924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1540  
   data-arc span      14186 days (38.84 yr)  
   first obs. used      1977-06-12  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49245  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:56:30  

Additional Information
 Earth MOID = 1.74029 au 
 Jupiter MOID = 1.57035 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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