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JPL Small-Body Database Browser
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20454 Pedrajo (1999 LD4)
Classification: Main-belt Asteroid          SPK-ID: 2020454
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1533465290524111 5.3928e-08  
a 2.47001429949503 1.1352e-08 au
q 2.091246179957645 1.3229e-07 au
i 6.943325768775575 5.4737e-06 deg
node 156.955923198104 3.1047e-05 deg
peri 191.3762797691369 3.3667e-05 deg
M 332.3833549229814 1.125e-05 deg
tp 2458709.271732476892
(2019-Aug-13.77173248)
4.4142e-05 TDB
period 1417.906613293391
3.88
9.775e-06
2.676e-08
d
yr
n .2538954234537514 1.7504e-09 deg/d
Q 2.848782419032416 1.3093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1167  
   data-arc span      10424 days (28.54 yr)  
   first obs. used      1991-05-16  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54924  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:44:29  

Additional Information
 Earth MOID = 1.084 au 
 Jupiter MOID = 2.56309 au 
 T_jup = 3.458 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO431735  
diameter diameter 2.745 km 0.611 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.257   0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20454 Pedrajo           Discovered 1999 June 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ana Cristina Pedrajo (b. 1990) 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 George Washington Carver Middle School, Miami, Florida.
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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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