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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1298135642114554 4.1984e-08  
a 3.176073553561593 2.9485e-08 AU
q 2.76377612537602 1.3644e-07 AU
i 2.520584490501448 4.814e-06 deg
node 69.25884521021361 0.00012864 deg
peri 216.7878211052408 0.00013074 deg
M 223.3022631641503 2.589e-05 deg
tp 2457785.542335523578
(2017-Feb-01.04233552)
0.00015173 JED
period 2067.446377169069
5.66
2.879e-05
7.882e-08
d
yr
n .1741278535566876 2.4248e-09 deg/d
Q 3.588370981747167 3.3312e-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 = 1.74923 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 12.7 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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