Letter | Published:

Rotation period of comet Donati

Abstract

COMET Donati, 1858VI, was a spectacular comet, famous for its coma with multiple haloes, seen, described, and measured by many observers using optical telescopes. The haloes were roughly parabolic envelopes with vertices towards the Sun forward from the tail axis and the ‘foci’ near the apparent nucleus of the comet. The envelopes appeared to be uniformly spaced radially from the nucleus. Because of the regularity and observed sharpness of these haloes, I assume here that they represent repetitive ejection of material from a single active area exposed successively to solar radiation as the solid cometary nucleus rotated1.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Whipple, F. L. Nature 276, 15 (1976).

  2. 2

    Schmidt, J. F. J. Pub. Athens Obs. Ser. 1, 1 (1863).

  3. 3

    Bobrovnikov, N. T. Astr. J. 59, 357 (1954).

  4. 4

    Winnecke, A. Mem. Acad. Imp. Sci. St Peteresbourg Ser. 7, 2, 15 (1859).

  5. 5

    Schmidt, J. F. J. Astr. Nach. 59, 97 (1863).

  6. 6

    Whipple, F. L. Bull. Am. astr. Soc. 9, 563 (1977).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.