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JPL Small-Body Database Browser
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18698 Racharles (1998 HX39)
Classification: Main-belt Asteroid          SPK-ID: 2018698
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09948030519945476 3.2483e-08  
a 2.422346104901338 1.0561e-08 au
q 2.181370375087043 8.0511e-08 au
i 2.985286536923363 3.8056e-06 deg
node 52.6528064633633 6.8165e-05 deg
peri 70.18443033147727 7.082e-05 deg
M 21.44282524644111 1.9334e-05 deg
tp 2458918.477646749590
(2020-Mar-09.97764675)
7.3839e-05 TDB
period 1377.059544662773
3.77
9.0058e-06
2.466e-08
d
yr
n .2614266038061266 1.7097e-09 deg/d
Q 2.663321834715634 1.1612e-08 au
  Orbit Determination Parameters
   # obs. used (total)      965  
   data-arc span      15422 days (42.22 yr)  
   first obs. used      1977-10-16  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54193  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:51:49  

Additional Information
 Earth MOID = 1.19924 au 
 Jupiter MOID = 2.38551 au 
 T_jup = 3.504 
[ 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 MPO452435  

18698 Racharles           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rachael Ann Charles (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her botany team project. She attends the Salpointe Catholic High School, Tucson, Arizona, 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
 1998 HX39 = 1997 BG2 = 3020 T-3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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