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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09295842728970699 3.6681e-08  
a 2.205091659115425 7.2854e-09 au
q 2.000109806454404 8.0401e-08 au
i 1.910124702492832 3.6061e-06 deg
node 223.1308089137906 0.0001214 deg
peri 43.50352826025191 0.00012301 deg
M 87.58864218992252 1.9342e-05 deg
tp 2458309.506230888967
(2018-Jul-10.00623089)
6.4368e-05 TDB
period 1196.019874960737
3.27
5.9273e-06
1.623e-08
d
yr
n .3009983425332443 1.4917e-09 deg/d
Q 2.410073511776445 7.9627e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1120  
   data-arc span      8426 days (23.07 yr)  
   first obs. used      1996-11-08  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46807  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:01:18  

Additional Information
 Earth MOID = .9843 au 
 Jupiter MOID = 2.63811 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 15.2   n/a MPO452492  
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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