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20354 Rebeccachan (1998 HA139)
Classification: Main-belt Asteroid          SPK-ID: 2020354
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1030705949909267 3.6075e-08  
a 2.347165615529719 9.5684e-09 au
q 2.105241858994826 8.5517e-08 au
i 6.408065594919232 3.1935e-06 deg
node 103.7468884490588 3.4281e-05 deg
peri 90.61421371245049 3.7708e-05 deg
M 116.0728499320092 1.5439e-05 deg
tp 2458777.010959668346
(2019-Oct-20.51095967)
5.6182e-05 TDB
period 1313.451462669334
3.60
8.0316e-06
2.199e-08
d
yr
n .2740870220421928 1.676e-09 deg/d
Q 2.589089372064612 1.0555e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      9681 days (26.51 yr)  
   first obs. used      1994-01-16  
   last obs. used      2020-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:41  

Additional Information
 Earth MOID = 1.11513 au 
 Jupiter MOID = 2.38601 au 
 T_jup = 3.545 
[ 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 15.06   n/a E2021B10  
diameter diameter 2.933 km 0.473 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.247   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20354 Rebeccachan           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rebecca Ann Chan (b. 1991) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her environmental sciences project. She attends the Rhoades School, Encinitas, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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