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42355 Typhon (2002 CR46)
Classification: TransNeptunian Object          SPK-ID: 2042355
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5360599851589742 5.2885e-06  
a 37.87667984200506 0.00047546 au
q 17.57250740802861 2.0835e-05 au
i 2.432573290963026 1.5552e-05 deg
node 352.0665863429984 0.00018331 deg
peri 159.1880746919683 0.00026154 deg
M 21.65832531457544 0.00045502 deg
tp 2453878.039085739325
(2006-May-22.53908574)
0.012083 TDB
period 85144.43764000651
233.11
1.6032
0.004389
d
yr
n .004228109433549751 7.9612e-08 deg/d
Q 58.18085227598151 0.00073034 au
  Orbit Determination Parameters
   # obs. used (total)      302  
   data-arc span      11079 days (30.33 yr)  
   first obs. used      1989-12-28  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .44896  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:05:30  

Additional Information
 Earth MOID = 16.5837 au 
 Jupiter MOID = 12.1745 au 
 T_jup = 4.688 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO385085  
diameter diameter 192.000 km 50.000 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  
rotation period rot_per 5. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Dotto, E.; Pema, D.; Barucci, M.A.; Rossi, A. et al. (2008) Astron. Astrophys. 490, 829-833.]
[Perna, D.; Dotto, E.; Barucci, M.A.; Rossi, A.; et al. (2008) Bull. Amer. Astron. Soc. 40, #47.08.]
geometric albedo albedo 0.050   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

42355 Typhon           Discovered 2002 Feb. 5 by NEAT at Palomar.
The secondary object (42355) Typhon I, discovered 2006 Jan. 20 by K. Noll, W. Grundy, D. Stephens and H. Levison using the Hubble Space Telescope, is named Echidna for the mother of all the major monsters in classical Greek mythology. Half nymph and half snake, Echidna lives, immortal, in a deep cave called Arima.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061109/MPCPages.arcLast Updated: 2006-11-13
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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