A CCD Image Archive Of Comet C/1995 O1 (Hale-Bopp): Dust Expansion Velocities


An optical archive of comet Hale-Bopp was obtained over 28 nights from June 1996 to May 1997 covering a range of heliocentric distances of r = 4.12 − 0.91. The CCD images were obtained with the 0.8-m University of Washington Manastash Ridge Observatory and the 0.25-m Pennsylvania State University at Eriemobile observatory. The reduced images clearly document the evolution of features of the coma, which were dominated by radial jetsfrom r = 4.1 − 2.3 AU, curved fan-shaped jets from r = 1.2 − 1.0 AU, and arcs or shells for 0.9 < r < 1.0 AU. We present the images and derive an average dust expansion velocity of Vdust = 0.67 ± 0.07 km s−1 from measurements of the arc features. The images in thearchive will be made available to other researchers for further study.

This is a preview of subscription content, log in to check access.


  1. A'Hearn, M. F. et al.: 1986, ‘Cyanogen Jets in Comet Halley’, Nature 324, 649–651.

    Article  ADS  Google Scholar 

  2. Biver, N. et al.: 1997, ‘Long-Term Evolution of the Outgassing of Comet Hale-Bopp from Radio Observations’, Earth, Moon, and Planets 78, 5–11.

    Article  ADS  Google Scholar 

  3. Farnham, T. L., Schleicher, D. G., Blount, E. A., and Ford, E.: 1998, ‘The Rotation Period of Comet Hale-Bopp (1995 O1)’, Paper presented at the First International Conference on Comet Hale-Bopp, Tenerife, Canary Islands, 2–5 February 1998.

  4. Fulle, M., Pasian, F., and Benvenuti, P.: 1992, ‘HST Observations of the Inner Coma of Comet Levy 1990c’, Modelling, Simulation and Sounding of Cometary Nuclei; Proceedings of the International Workshop, Cagliari, Italy. A92-39408 16–12, Annales Geophysicae 10(3–4), 145–149.

    Google Scholar 

  5. Jorda, L., Colas, F., and Lecacheux, J.: 1994, ‘The Dust Jets of P/Swift–Tuttle 1992t’, Planetary and Space Science 42(9), 699–704.

    Article  ADS  Google Scholar 

  6. Kidger, M. R., Serra-Ricart, M., Bellot-Rubio, L. R., and Casas, R.: 1996, ‘Evolution of a Spiral Jet in the Inner Coma of Comet Hale-Bopp (1995 O1)’, Ap. J. 461, L119–L122.

    Article  ADS  Google Scholar 

  7. Lardiére, O., Garro, S., and Merlin, J.-C.: 1998, ‘Evolution of Dust Shells and Jets in the Inner Coma of Comet C/1995 O1 (Hale-Bopp)’, Earth, Moon, and Planets 78, 205–210.

    Article  ADS  Google Scholar 

  8. Larson, S. M., and Sekanina, Z.: 1984, ‘Coma Morphology and Dust-Emission Pattern of Periodic Comet Halley, I–High-Resolution Images Taken at Mount Wilson in 1910’, Astron. J. 89, 571–578.

    Article  ADS  Google Scholar 

  9. Lecacheux, J., Jorda, L., and Colas, F.: 1997, IAU Circular 6560.

  10. Lisse, C. M. et al.: 1997, ‘Infrared Observations of Dust Emission from Comet Hale-Bopp’, Earth, Moon, and Planets 78, 251–257.

    Article  ADS  Google Scholar 

  11. Marsden, B. G.: 1996, IAU Circular 6463.

  12. Morgan, J.: 1997, ‘Manastash Ridge Observatory Users Manual’, University of Washington, Table 1.

  13. Schulz, R., McFadden, L. A., Chamberlin, A. B., A'Hearn, M. F., and Schleicher, D. G.: 1994, ‘Variability in Comet P/Swift–Tuttle’, Icarus 109(1), 145–155.

    Article  ADS  Google Scholar 

  14. Schwarz, G., Cosmovici, C., Mack, P., and Ip, W.: 1989, ‘Image Processing Techniques for Gas Morphology Studies in the Coma of Comet Halley’, Adv. Space Res. 9(3), 217–220.

    Article  ADS  Google Scholar 

  15. Sekanina, Z. and Boehnhardt, H.: 1997, IAU Circular 6542.

  16. Sekanina, Z.: 1998, ‘Modeling the Diurnal Evolution of a Dust Feature in Comet Hale-Bopp (1995 O1)’, Ap. J. 494, L121–L123.

    Article  ADS  Google Scholar 

  17. Yu, N., Gnedin, T., and Kiseleva, P.: 1998, ‘Photographic Observations of Comet Hale-Bopp: The Properties of Shell Structure’, Paper presented at the First International Conference on Comet Hale-Bopp, Tenerife, Canary Islands, 2–5 February 1998.

Download references

Author information



Rights and permissions

Reprints and Permissions

About this article

Cite this article

BRAUNSTEIN, M., COMSTOCK, R., HOFFMAN, P. et al. A CCD Image Archive Of Comet C/1995 O1 (Hale-Bopp): Dust Expansion Velocities. Earth, Moon, and Planets 78, 219–227 (1997). https://doi.org/10.1023/A:1006201100330

Download citation

  • Comet Hale-Bopp
  • cometary arcs
  • cometary shells
  • cometary jets