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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 | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2589763111029261 3.0214e-08  
a 2.343736075063481 6.7166e-09 au
q 1.73676395214469 7.1015e-08 au
i 5.411891415021359 4.1446e-06 deg
node 256.4877824104277 3.8567e-05 deg
peri 85.6503360565071 3.9597e-05 deg
M 294.2454482662471 8.8372e-06 deg
tp 2459239.878314487257
(2021-Jan-25.37831449)
3.2617e-05 TDB
period 1310.573807336549
3.59
5.6337e-06
1.542e-08
d
yr
n .274688840860951 1.1808e-09 deg/d
Q 2.950708197982272 8.456e-09 au
  Orbit Determination Parameters
   # obs. used (total)      850  
   data-arc span      10097 days (27.64 yr)  
   first obs. used      1992-11-28  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51951  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:44:51  

Additional Information
 Earth MOID = .739157 au 
 Jupiter MOID = 2.49517 au 
 T_jup = 3.511 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO436630  

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

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