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3984 Chacos (1984 SB6)
Classification: Main-belt Asteroid          SPK-ID: 2003984
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1817481845329675 4.9e-08  
a 2.436612043363823 1.2836e-08 au
q 1.993762228071283 1.1632e-07 au
i 2.937530894217676 5.7452e-06 deg
node 100.0854803586096 9.7643e-05 deg
peri 262.954583690957 9.9431e-05 deg
M 135.1012220067813 2.0052e-05 deg
tp 2457079.143511284815
(2015-Feb-25.64351128)
7.5078e-05 JED
period 1389.242326231852
3.80
1.0978e-05
3.006e-08
d
yr
n .2591340568901723 2.0477e-09 deg/d
Q 2.879461858656362 1.5169e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1188  
   data-arc span      16947 days (46.40 yr)  
   first obs. used      1969-11-11  
   last obs. used      2016-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52131  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:46:20  

Additional Information
 Earth MOID = .992746 au 
 Jupiter MOID = 2.56917 au 
 T_jup = 3.480 
[ 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 14.4 mag n/a MPO358668  

3984 Chacos           Discovered 1984 Sept. 21 by H. Debehogne at the European Southern Observatory.
Albert Anthony Chacos (b. 1953) helped further the exploration of the planets as a key engineer for NASA's New Horizons Pluto-Kuiper Belt mission. He also played important roles in other space missions, including the Messenger mission to Mercury.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

[ show close-approach data ]
Alternate Designations
 1984 SB6 = 1969 VE1 = 1980 PS2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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