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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819715543510548 5.057e-08  
a 2.435776108790206 1.3513e-08 au
q 1.992534144222488 1.2115e-07 au
i 2.937967021324047 5.7935e-06 deg
node 100.0918932588276 0.00010662 deg
peri 262.8508546969827 0.0001083 deg
M 83.35509261424262 1.9839e-05 deg
tp 2457078.997677866444
(2015-Feb-25.49767787)
7.5083e-05 JED
period 1388.52747130538
3.80
1.1554e-05
3.163e-08
d
yr
n .2592674667513472 2.1574e-09 deg/d
Q 2.879018073357924 1.5971e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      16839 days (46.10 yr)  
   first obs. used      1969-11-11  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5107  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:50:27  

Additional Information
 Earth MOID = .990729 au 
 Jupiter MOID = 2.56948 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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