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22911 Johnpardon (1999 TX30)
Classification: Main-belt Asteroid          SPK-ID: 2022911
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09280371051459647 3.3456e-08  
a 2.205370163028997 6.5506e-09 au
q 2.000703628841726 7.387e-08 au
i 1.909880211905797 3.4543e-06 deg
node 223.1183727538602 0.000109 deg
peri 43.72965133209495 0.00011046 deg
M 267.9127832592097 1.8033e-05 deg
tp 2459506.497244011763
(2021-Oct-18.99724401)
5.999e-05 TDB
period 1196.246468761385
3.28
5.3298e-06
1.459e-08
d
yr
n .3009413272272816 1.3408e-09 deg/d
Q 2.410036697216269 7.1585e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1261  
   data-arc span      8893 days (24.35 yr)  
   first obs. used      1996-11-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47035  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:42  

Additional Information
 Earth MOID = .983534 au 
 Jupiter MOID = 2.63735 au 
 T_jup = 3.655 
[ 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 15.19   n/a E2021B10  
diameter diameter 2.485 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22911 Johnpardon           Discovered 1999 Oct. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John Vincent Pardon (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for his mathematics project. He attends the Durham Academy Upper School, Durham, North Carolina.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070303/MPCPages.arcLast Updated: 2010-04-12

Alternate Designations
 1999 TX30 = 1996 VM21 = 1998 FG54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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