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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1821799844172889 5.2944e-08  
a 2.436136258573979 1.451e-08 AU
q 1.992320992948579 1.2841e-07 AU
i 2.938023252616503 5.8027e-06 deg
node 100.0938773446174 0.00011556 deg
peri 262.843432810045 0.00011711 deg
M 339.6501215482479 1.9422e-05 deg
tp 2457079.007312244537
(2015-Feb-25.50731224)
7.5286e-05 JED
period 1388.835440714882
3.80
1.2408e-05
3.397e-08
d
yr
n .2592099750958943 2.3158e-09 deg/d
Q 2.879951524199379 1.7153e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      970  
   data-arc span      16402 days (44.91 yr)  
   first obs. used      1969-11-11  
   last obs. used      2014-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52285  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:54:51  

Additional Information
 Earth MOID = .992491 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 14.3 mag n/a MPO265978  

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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