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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1026122712788435 3.6941e-08  
a 2.346954034626912 9.4706e-09 au
q 2.106127750546799 8.7429e-08 au
i 6.409039213744339 3.204e-06 deg
node 103.749811777361 3.4894e-05 deg
peri 90.55393893418167 3.832e-05 deg
M 61.36238218411896 1.5542e-05 deg
tp 2458776.651074880150
(2019-Oct-20.15107488)
5.6619e-05 TDB
period 1313.273868692831
3.60
7.9492e-06
2.176e-08
d
yr
n .2741240868200069 1.6593e-09 deg/d
Q 2.587780318707025 1.0442e-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 = 1.11675 au 
 Jupiter MOID = 2.38839 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 15.0   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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