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18961 Hampfreeman (2000 QR140)
Classification: Main-belt Asteroid          SPK-ID: 2018961
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906193028917263 3.633e-08  
a 2.394868525718231 8.2398e-09 au
q 1.938360356828485 8.5535e-08 au
i 2.459883225998111 4.1238e-06 deg
node 18.02355236074981 7.7697e-05 deg
peri 49.94182877253181 7.8588e-05 deg
M 119.042965013604 9.5053e-06 deg
tp 2458752.866917245222
(2019-Sep-26.36691725)
3.5668e-05 TDB
period 1353.695363462296
3.71
6.9863e-06
1.913e-08
d
yr
n .2659387109661375 1.3725e-09 deg/d
Q 2.851376694607976 9.8105e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1353  
   data-arc span      11455 days (31.36 yr)  
   first obs. used      1989-11-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52191  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:43:10  

Additional Information
 Earth MOID = .952856 au 
 Jupiter MOID = 2.45089 au 
 T_jup = 3.503 
[ 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 15.3   n/a MPO452439  

18961 Hampfreeman           Discovered 2000 Aug. 31 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Thomas Hampton Freeman (b. 1986) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for his botany project. He attends the Spring Valley High School, Columbia, South Carolina, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040830/MPCPages.arcLast Updated: 2004-09-06

Alternate Designations
 2000 QR140 = 1989 VY5 = 1997 XW11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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