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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1024216351443902 3.6905e-08  
a 2.346292253327156 9.5855e-09 au
q 2.105981164214773 8.7368e-08 au
i 6.409010046069513 3.2041e-06 deg
node 103.750239136232 3.4899e-05 deg
peri 90.36158545142904 3.8345e-05 deg
M 311.852681317132 1.5554e-05 deg
tp 2458776.066314508402
(2019-Oct-19.56631451)
5.6765e-05 TDB
period 1312.71844314591
3.59
8.0444e-06
2.202e-08
d
yr
n .2742400717226653 1.6806e-09 deg/d
Q 2.58660334243954 1.0567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1283  
   data-arc span      9257 days (25.34 yr)  
   first obs. used      1994-01-16  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53133  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:40:04  

Additional Information
 Earth MOID = 1.11699 au 
 Jupiter MOID = 2.39073 au 
 T_jup = 3.545 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456634.5 (2013-Dec-08.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028449946660421 3.6843e-08  
q 2.10502619436072 8.7288e-08 au
tp 2456151.002679957777
(2012-Aug-11.50267996)
5.801e-05 TDB
node 103.7850467686021 3.4881e-05 deg
peri 90.48530085832793 3.8302e-05 deg
i 6.410496318552283 3.205e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1283  
   data-arc span      9257 days (25.34 yr)  
   first obs. used      1994-01-16  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53133  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:40:04  

Additional Information
 Jupiter MOID = 2.39073 au 
 T_jup = 3.545 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.357392291572068E-15 -3.200393551258601E-15 3.200150842533204E-13 2.308505657852914E-16 1.176832401004717E-13 -1.932855424085721E-15
q -3.200393551258601E-15 7.619246551402115E-15 -8.657423836810747E-13 -2.846269280467283E-16 -3.010211013595967E-13 4.686581344289349E-15
tp 3.200150842533204E-13 -8.657423836810747E-13 3.365185318082777E-9 4.290080596913429E-12 9.322513945607767E-10 -1.319193242782603E-12
node 2.308505657852914E-16 -2.846269280467283E-16 4.290080596913429E-12 1.216699756932949E-9 -1.207644438296321E-9 -1.281415440804571E-11
peri 1.176832401004717E-13 -3.010211013595967E-13 9.322513945607767E-10 -1.207644438296321E-9 1.467063835287659E-9 1.237105874719054E-11
i -1.932855424085721E-15 4.686581344289349E-15 -1.319193242782603E-12 -1.281415440804571E-11 1.237105874719054E-11 1.027193461891853E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO324497  
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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