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129980 Catherinejohnson (1999 UN42)
Classification: Main-belt Asteroid          SPK-ID: 2129980
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2587021934150189 3.0249e-08  
a 2.343448841502622 6.7601e-09 au
q 1.737193486050009 7.1011e-08 au
i 5.410691836935437 4.1437e-06 deg
node 256.4745407175545 3.8582e-05 deg
peri 85.59634623671487 3.9613e-05 deg
M 43.06529808847911 9.0497e-06 deg
tp 2459239.750342905296
(2021-Jan-25.25034291)
3.2627e-05 TDB
period 1310.332891186691
3.59
5.6699e-06
1.552e-08
d
yr
n .2747393448041813 1.1888e-09 deg/d
Q 2.949704196955235 8.509e-09 au
  Orbit Determination Parameters
   # obs. used (total)      851  
   data-arc span      10097 days (27.64 yr)  
   first obs. used      1992-11-28  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52346  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 01:04:48  

Additional Information
 Earth MOID = .738774 au 
 Jupiter MOID = 2.49622 au 
 T_jup = 3.511 
[ 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 15.96   n/a E2021B55  

129980 Catherinejohnson           Discovered 1999 Oct. 28 by the Catalina Sky Survey.
Catherine Johnson (b. 1967) is a planetary geophysicist and a Co-Investigator for the OSIRIS-REx Asteroid Sample Return Mission and for the InSight mission to Mars. She was a Participating Scientist on the MESSENGER mission to Mercury and is a Fellow of the American Geophysical Union.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-11-14Last Updated: 2016-11-20

Alternate Designations
 1999 UN42 = 2002 JP55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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