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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1558986501844614 2.7864e-08  
a 2.586930833637773 1.0549e-08 au
q 2.183631808553081 7.6307e-08 au
i 7.268453044591624 4.5784e-06 deg
node 207.3840441015646 2.381e-05 deg
peri 280.0325078947752 2.8862e-05 deg
M 298.7669367654543 1.7352e-05 deg
tp 2459458.999160984572
(2021-Sep-01.49916098)
7.3902e-05 TDB
period 1519.762249979102
4.16
9.2957e-06
2.545e-08
d
yr
n .2368791565950203 1.4489e-09 deg/d
Q 2.990229858722466 1.2193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      9260 days (25.35 yr)  
   first obs. used      1995-10-02  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:42  

Additional Information
 Earth MOID = 1.21239 au 
 Jupiter MOID = 2.11997 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 15.08   n/a E2021B10  

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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