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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .540814140128355 1.196e-05  
a 38.17614140261809 0.0010805 AU
q 17.52994431654269 4.0029e-05 AU
i 2.425096112124809 2.6038e-05 deg
node 351.9082964469569 0.00041232 deg
peri 159.1355222713148 0.00048487 deg
M 13.04285705477341 0.00054485 deg
tp 2453879.047672141277
(2006-May-23.54767214)
0.016087 JED
period 86156.18750631643
235.88
3.6577
0.01001
d
yr
n .004178457873076232 1.774e-07 deg/d
Q 58.82233848869348 0.0016649 AU
  Orbit Determination Parameters
   # obs. used (total)      173  
   data-arc span      8881 days (24.31 yr)  
   first obs. used      1989-12-28  
   last obs. used      2014-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .58137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:29:20  

Additional Information
 Earth MOID = 16.5417 AU 
 T_jup = 4.689 
[ 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 7.5 mag n/a MPO259630  
rotation period rot_per 5. h n/a LCDB (Rev. 2015-July); 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) Bul. Amer. Astron. Soc. 40, 483 (47.08).]

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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