The moon and the planets

, Volume 26, Issue 1, pp 3–9 | Cite as

Spectrophotometry of Comet Bradfield (1980t) during post-perihelion period

  • P. S. Goraya
  • B. K. Sinha
  • U. S. Chaubey
  • B. B. Sanwal


Spectrum scans of the head of Comet Bradfield (1980t) covering the wavelength range λλ365–640 nm were made on two nights when the heliocentric distance of the comet varied from 0.55 to 0.58 AU. The emission features of the CN band at λ388 nm and Swan band sequence of C2 at λ474 nm, λ516 nm, and λ563 nm are identified and absolute fluxes in these bands as well as in the continuum are derived. The continuum energy distribution curves of the comet have been compared with those of the Sun and the star β Crv (G5 III). An estimate of the number of C2 and CN molecules in the head of the comet has been made through the measured intensities of their respective bands lying in this region.


Wavelength Range Energy Distribution Spectrophotometry Distribution Curve Emission Feature 
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Copyright information

© D. Reidel Publishing Co. 1982

Authors and Affiliations

  • P. S. Goraya
    • 1
  • B. K. Sinha
    • 1
  • U. S. Chaubey
    • 1
  • B. B. Sanwal
    • 1
  1. 1.Uttar Pradesh State ObservatoryNaini TalIndia

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