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18782 Joanrho (1999 JJ46)
Classification: Main-belt Asteroid          SPK-ID: 2018782
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1334249902682791 3.5343e-08  
a 2.398716618390397 9.9497e-09 au
q 2.078667876925299 8.4874e-08 au
i 3.845744089952369 4.0226e-06 deg
node 160.8041729778481 6.0213e-05 deg
peri 139.3638803020967 6.2291e-05 deg
M 237.8360664650104 1.6115e-05 deg
tp 2459660.976371492003
(2022-Mar-22.47637149)
6.1352e-05 TDB
period 1356.959365504072
3.72
8.4429e-06
2.312e-08
d
yr
n .2652990274813942 1.6507e-09 deg/d
Q 2.718765359855495 1.1277e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1075  
   data-arc span      13508 days (36.98 yr)  
   first obs. used      1984-03-29  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57238  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:47:40  

Additional Information
 Earth MOID = 1.06302 au 
 Jupiter MOID = 2.47919 au 
 T_jup = 3.512 
[ 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 15.38   n/a MPCxxxxx  
diameter diameter 2.117 km 0.480 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18782 Joanrho           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Joan Young Rho (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her engineering team project. She attends the Wheatley School, Old Westbury, New York, 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: 20040830/MPCPages.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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