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22912 Noraxu (1999 TF31)
Classification: Main-belt Asteroid          SPK-ID: 2022912
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1558167481783873 3.3025e-08  
a 2.586579027818229 1.295e-08 au
q 2.183546694797178 8.5925e-08 au
i 7.26887420118973 5.061e-06 deg
node 207.3838007025912 3.1568e-05 deg
peri 280.0798223798143 3.591e-05 deg
M 251.3278137232754 1.8414e-05 deg
tp 2459459.172770213925
(2021-Sep-01.67277021)
7.9105e-05 TDB
period 1519.452243801768
4.16
1.1411e-05
3.124e-08
d
yr
n .2369274858545449 1.7793e-09 deg/d
Q 2.989611360839279 1.4968e-08 au
  Orbit Determination Parameters
   # obs. used (total)      798  
   data-arc span      8322 days (22.78 yr)  
   first obs. used      1995-10-02  
   last obs. used      2018-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59129  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 00:15:04  

Additional Information
 Earth MOID = 1.21237 au 
 Jupiter MOID = 2.121 au 
 T_jup = 3.393 
[ 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 15.0   n/a MPO365524  

22912 Noraxu           Discovered 1999 Oct. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Nora Xu (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for her physics project. She attends the Illinois Mathematics and Science Academy, Aurora, Illinois.
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 TF31 = 1997 HB14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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