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JPL Small-Body Database Browser
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20335 Charmartell (1998 HK57)
Classification: Main-belt Asteroid          SPK-ID: 2020335
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02501871972323345 3.4028e-08  
a 2.510941343752548 1.1751e-08 au
q 2.448120806031723 9.0655e-08 au
i 2.842514893950275 4.492e-06 deg
node 207.6805163721102 8.0505e-05 deg
peri 240.2429367000215 0.00016215 deg
M 218.6518212266842 0.00014452 deg
tp 2459171.112123455167
(2020-Nov-17.61212346)
0.00058392 TDB
period 1453.293323101805
3.98
1.0202e-05
2.793e-08
d
yr
n .2477132415578996 1.739e-09 deg/d
Q 2.573761881473372 1.2045e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1034  
   data-arc span      8902 days (24.37 yr)  
   first obs. used      1995-07-03  
   last obs. used      2019-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5432  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:43:16  

Additional Information
 Earth MOID = 1.46561 au 
 Jupiter MOID = 2.45969 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 14.9   n/a MPO319339  
diameter diameter 2.634 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.336   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20335 Charmartell           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Charles Martell mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Ulysses S. Grant High School, Portland, Oregon.
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

Alternate Designations
 1998 HK57 = 1999 RT225 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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