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20643 Angelicaliu (1999 TK142)
Classification: Main-belt Asteroid          SPK-ID: 2020643
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1298280357669749 3.7113e-08  
a 2.429407968043705 9.8245e-09 au
q 2.114002703475952 9.0758e-08 au
i 2.239943581150799 3.5359e-06 deg
node 251.1942246957534 0.00010637 deg
peri 314.7168997938292 0.00010721 deg
M 2.343022000867237 1.4691e-05 deg
tp 2459191.498332438432
(2020-Dec-07.99833244)
5.6424e-05 TDB
period 1383.085741817581
3.79
8.3897e-06
2.297e-08
d
yr
n .2602875505945902 1.5789e-09 deg/d
Q 2.744813232611457 1.11e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      8499 days (23.27 yr)  
   first obs. used      1997-01-11  
   last obs. used      2020-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49341  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:25:59  

Additional Information
 Earth MOID = 1.10945 au 
 Jupiter MOID = 2.22087 au 
 T_jup = 3.496 
[ 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 15.12   n/a E2021B10  
diameter diameter 5.461 km 0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.065   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20643 Angelicaliu           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Angelica Liu (b. 1988) was awarded second place in the 2004 Intel International Science and Engineering Fair for her botany team project. She attends the Upper Arlington High School, Upper Arlington, Ohio, 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: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 1999 TK142 = 1998 KO13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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