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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .535148572264229 4.0332e-06  
a 37.78046965432287 0.00036232 au
q 17.56230525933996 1.6616e-05 au
i 2.433143204855498 9.9023e-06 deg
node 352.083174781932 0.0001398 deg
peri 159.0493171407141 0.00020437 deg
M 22.62538820360187 0.00036453 deg
tp 2453869.692571895554
(2006-May-14.19257190)
0.0095368 TDB
period 84820.23189383725
232.23
1.2202
0.003341
d
yr
n .004244270405327156 6.1054e-08 deg/d
Q 57.99863404930578 0.00055621 au
  Orbit Determination Parameters
   # obs. used (total)      468  
   data-arc span      11135 days (30.49 yr)  
   first obs. used      1989-12-28  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .45876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:08:23  

Additional Information
 Earth MOID = 16.5733 au 
 Jupiter MOID = 12.1641 au 
 T_jup = 4.686 
[ 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 7.61   n/a E2021B10  
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. 2020-October); 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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