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20839 Bretharrison (2000 US55)
Classification: Main-belt Asteroid          SPK-ID: 2020839
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0606640934456721 4.0065e-08  
a 2.698974301672641 1.1697e-08 au
q 2.535243472428504 1.1157e-07 au
i 3.623193465969387 3.8896e-06 deg
node 131.297566649325 6.0874e-05 deg
peri 203.0652786375265 6.7387e-05 deg
M 268.0809014321206 2.9813e-05 deg
tp 2459614.023130498806
(2022-Feb-03.52313050)
0.00013424 TDB
period 1619.558169074469
4.43
1.0528e-05
2.882e-08
d
yr
n .2222828465653257 1.445e-09 deg/d
Q 2.862705130916777 1.2407e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1734  
   data-arc span      10030 days (27.46 yr)  
   first obs. used      1992-12-02  
   last obs. used      2020-05-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53294  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:32:40  

Additional Information
 Earth MOID = 1.52331 au 
 Jupiter MOID = 2.35491 au 
 T_jup = 3.363 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.61   n/a E2021B10  
diameter diameter 3.014 km 1.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20839 Bretharrison           Discovered 2000 Oct. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Brett Harrison (b. 1988) was awarded second place in the 2004 Intel International Science and Engineering Fair for his mathematics project. He attends the Half Hollow Hills High School West, Dix Hills, New York, 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: 20041226/MPCPages.arcLast Updated: 2004-12-25

[ show close-approach data ]
Alternate Designations
 2000 US55 = 1998 FG131 = 1999 NZ31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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