Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02501872046586381 3.4128e-08  
a 2.510941344120424 1.1822e-08 au
q 2.448120804525694 9.0809e-08 au
i 2.842514677768458 4.5032e-06 deg
node 207.680509415018 8.1144e-05 deg
peri 240.2429443518027 0.00016248 deg
M 218.6518203131831 0.00014461 deg
tp 2459171.112127268303
(2020-Nov-17.61212727)
0.00058432 TDB
period 1453.293323421185
3.98
1.0263e-05
2.81e-08
d
yr
n .2477132415034613 1.7494e-09 deg/d
Q 2.573761883715153 1.2117e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1028  
   data-arc span      8886 days (24.33 yr)  
   first obs. used      1995-07-03  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54429  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:22:50  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-07 07:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin