Thatcher (Comet)

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C/1861 G1/Thatcher
Discovery
Discovered by: A. E. Thatcher
Discovery date: April 5, 1861
Alternate designations: C/1861 G1, Thatcher
Orbital characteristics A
Epoch: 2400920.5 (May 25, 1861)
Aphelion distance: 110.44307381 AU
Perihelion distance: 0.9207 AU
Semi-major axis: 55.6818869065619 AU
Eccentricity: 0.983465
Orbital period: 415.5077 a
Inclination: 79.7733°

Comet Thatcher is a non-periodic comet responsible for the Lyrids meteor shower,[1] first identified by A. E. Thatcher. Carl Wilhelm Baeker also independently identified this comet, although it had also been previously recorded for over 2,600 years.[2]

[edit] References

  1. ^ Arter, T. R.; Williams, I. P. (1997). "The mean orbit of the April Lyrids". Monthly Notices of the Royal Astronomical Society 289 (3): 721–728, http://adsabs.harvard.edu/abs/1997MNRAS.289..721A. Retrieved on 2 November 2007. 
  2. ^ Atkins, William (21 April 2007). "Oldest known meteor shower, Lyrid, coming to your local sky" (in English) 1. iTWire. Retrieved on 2008-08-06.
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