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6042 Cheshirecat (1990 WW2)
Classification: Mars-crossing Asteroid          SPK-ID: 2006042
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4575447213279287 2.5294e-08  
a 3.038395364932837 1.3126e-08 au
q 1.648193604400572 8.0281e-08 au
i 15.88654304118696 1.6044e-06 deg
node 88.60788268880476 4.4823e-06 deg
peri 286.1595821593962 4.3858e-06 deg
M 294.6277260414391 5.6688e-06 deg
tp 2459747.782039428737
(2022-Jun-17.28203943)
3.2238e-05 TDB
period 1934.482717772804
5.30
1.2536e-05
3.432e-08
d
yr
n .1860962606140379 1.2059e-09 deg/d
Q 4.428597125465101 1.9132e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1709  
   data-arc span      15336 days (41.99 yr)  
   first obs. used      1979-08-14  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50262  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 18:35:16  

Additional Information
 Earth MOID = .731295 au 
 Jupiter MOID = 1.5461 au 
 T_jup = 3.020 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457319.5 (2015-Oct-24.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4570279509514491 2.535e-08  
q 1.650164041071409 8.0555e-08 au
tp 2457814.358004819440
(2017-Mar-01.85800482)
2.3494e-05 TDB
node 88.60908863192692 4.4809e-06 deg
peri 286.315974089323 4.3857e-06 deg
i 15.8862723064715 1.6043e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1709  
   data-arc span      15336 days (41.99 yr)  
   first obs. used      1979-08-14  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50262  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 18:35:16  

Additional Information
 Jupiter MOID = 1.5461 au 
 T_jup = 3.020 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.426227472631118E-16 -2.035508949818569E-15 -3.559872967590433E-13 -3.783054970412794E-16 2.567083909318428E-15 -9.086085033551819E-16
q -2.035508949818569E-15 6.489164993411632E-15 1.174928326365031E-12 5.568102717545127E-15 -8.518985084924408E-15 2.113003653826894E-15
tp -3.559872967590433E-13 1.174928326365031E-12 5.519833356497036E-10 3.079904366285112E-11 1.410134540799349E-11 -5.409420724986157E-12
node -3.783054970412794E-16 5.568102717545127E-15 3.079904366285112E-11 2.007821118878936E-11 -1.603262360326051E-11 -4.16772851533457E-12
peri 2.567083909318428E-15 -8.518985084924408E-15 1.410134540799349E-11 -1.603262360326051E-11 1.923479323364389E-11 3.337580424949527E-12
i -9.086085033551819E-16 2.113003653826894E-15 -5.409420724986157E-12 -4.16772851533457E-12 3.337580424949527E-12 2.57388510461247E-12

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 12.97   n/a MPO636156  
rotation period rot_per 10.050 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Folberth, J.; Casimir, S.; Dou, Y.; Evans, D; et al. (2012) Minor Planet Bull. 39, 51-55.]
[Stephens, R.D. (2012) Minor Planet Bull. 39, 80-82.]

6042 Cheshirecat           Discovered 1990 Nov. 23 by A. Natori and T. Urata at the JCPM Yakiimo Station.
Named for a cat appearing in Lewis Carroll's famous fairy tale Alice in Wonderland . Its unique characteristic is its laughing voice that lingers after the cat fades away. Name and citation proposed by T. Urata.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

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