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20331 Bijemarks (1998 HH45)
Classification: Main-belt Asteroid          SPK-ID: 2020331
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03785682744655522 4.1632e-08  
a 2.756879368136758 1.3251e-08 au
q 2.652512661606237 1.1281e-07 au
i 3.63394260485779 4.151e-06 deg
node 292.5714996160664 7.073e-05 deg
peri 103.9946070656142 9.71e-05 deg
M 149.7259437000357 6.4551e-05 deg
tp 2458505.124108037315
(2019-Jan-21.62410804)
0.00030103 TDB
period 1671.956876144953
4.58
1.2054e-05
3.3e-08
d
yr
n .2153165581818447 1.5524e-09 deg/d
Q 2.861246074667279 1.3753e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1854  
   data-arc span      8831 days (24.18 yr)  
   first obs. used      1997-01-10  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49344  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:19  

Additional Information
 Earth MOID = 1.66072 au 
 Jupiter MOID = 2.30446 au 
 T_jup = 3.339 
[ 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 13.88   n/a E2021B10  
diameter diameter 9.000 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20331 Bijemarks           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Billie Jean Marks mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Crystal Springs Uplands School, Hillsborough, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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