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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2588885716333481 3.0237e-08  
a 2.343995329146554 6.8326e-09 au
q 1.737161726468563 7.1015e-08 au
i 5.410679425818101 4.1436e-06 deg
node 256.4802695303032 3.858e-05 deg
peri 85.59625860799832 3.961e-05 deg
M 349.215977985607 8.9373e-06 deg
tp 2459239.765560820790
(2021-Jan-25.26556082)
3.262e-05 TDB
period 1310.791268472757
3.59
5.7313e-06
1.569e-08
d
yr
n .2746432698010318 1.2008e-09 deg/d
Q 2.950828931824544 8.6014e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:48:54  

Additional Information
 Earth MOID = .737741 au 
 Jupiter MOID = 2.49523 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 15.96   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

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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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