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187638 Greenewalt (2007 CH26)
Classification: Main-belt Asteroid          SPK-ID: 2187638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1152574126586386 7.3524e-08  
a 2.481144569346567 1.8336e-08 au
q 2.19517426585165 1.7798e-07 au
i 7.033285794377183 5.3316e-06 deg
node 109.0992410233693 5.5701e-05 deg
peri 218.2203567919899 7.2641e-05 deg
M 6.292871664700429 5.3805e-05 deg
tp 2459175.546991976458
(2020-Nov-22.04699198)
0.00021317 TDB
period 1427.501364578143
3.91
1.5824e-05
4.332e-08
d
yr
n .2521889007835643 2.7956e-09 deg/d
Q 2.767114872841485 2.0449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      210  
   data-arc span      8843 days (24.21 yr)  
   first obs. used      1995-01-08  
   last obs. used      2019-03-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .71705  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 08:52:58  

Additional Information
 Earth MOID = 1.18592 au 
 Jupiter MOID = 2.52327 au 
 T_jup = 3.459 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.9   n/a MPO433235  

187638 Greenewalt           Discovered 2007 Feb. 11 by D. Skillman at CBA-NOVAC Observatory.
Crawford Greenewalt (1902-1993) witnessed Fermi's first atomic chain reaction in 1942, and as technical director of the plutonium plant in Hanford, Washington, headed DuPont's involvement in the Manhattan project. His great-grandson, Asher Greenewalt (b. 2003), is already taking an interest in science.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

Alternate Designations
 2007 CH26 = 1995 AB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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