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12494 Doughamilton (1998 DH11)
Classification: Inner Main-belt Asteroid          SPK-ID: 2012494
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03174989111432014 3.8284e-08  
a 1.922977449934341 5.075e-09 au
q 1.861923125283632 7.2874e-08 au
i 24.73941304828508 4.5399e-06 deg
node 137.9813182032654 7.5037e-06 deg
peri 160.7698537351726 5.8671e-05 deg
M 1.200737857740578 5.6936e-05 deg
tp 2458997.251331354337
(2020-May-27.75133135)
0.00015405 TDB
period 974.0016981218945
2.67
3.8558e-06
1.056e-08
d
yr
n .3696092118670482 1.4632e-09 deg/d
Q 1.984031774585049 5.2361e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1663  
   data-arc span      11791 days (32.28 yr)  
   first obs. used      1988-07-18  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:52:36  

Additional Information
 Earth MOID = .851137 au 
 Jupiter MOID = 3.14522 au 
 T_jup = 3.810 
[ 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 14.6   n/a MPO358751  

12494 Doughamilton           Discovered 1998 Feb. 25 by JPL/GEODSS NEAT at Haleakala.
Douglas P. Hamilton (b. 1/1/1966) is a dynamicist specializing in small particles in the solar system. His major contributions involve motions and resonances when several different forces are involved, work for which he received the American Astronomical Society's Urey prize in 1999. The name was suggested by M. A'Hearn.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1998 DH11 = 1988 OB = 1990 HR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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