Space Science Reviews

, Volume 90, Issue 1–2, pp 75–82 | Cite as

H2O-Activity of Comet Hale-Bopp

  • E. Kührt


Due to the outstanding brightness of Comet Hale-Bopp measurements of water production rates were possible over a wide range of heliocentric distances (up to 5 AU). A variety of observing techniques have been used, including radio observations, IR- and UV-measurements. The H2O-production of a comet is closely connected with the energy balance and the composition of its surface. By comparing measured and calculated rates it is possible to derive properties of the nucleus. The results of this study demonstrate the importance of seasonal effects and show that a low thermal conductivity enhances the water production rate. The observations can be matched with a relatively low, lunar-like thermal conductivity. A lower size limit for the nucleus of Hale-Bopp is derived.


Water Production Heliocentric Distance Spin Axis Seasonal Effect Lunar Regolith 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Benkhoff, J. and Huebner, W.F.: 1995, ‘Influence of the Vapor Flux on Temperature,Density, andAbundance Distributions in a Multicomponent, Porous, Icy Body’, Icarus 114, 348–354.CrossRefADSGoogle Scholar
  2. Bockelée-Morvan, D. and Rickman, H.: 1998, ‘C/1995 O1 (Hale-Bopp) Gas Production Curvesandtheir Interpretation’, Proceedings of the First Intern. Conf. on Comet Hale-Bopp, Tenerife.Google Scholar
  3. Colom, P., Gérard, E., Crovisier, J., and Bockelée-Morvan, D.: 1998, ‘Observations of the OH Radicalsin Comet C/1995 O1 (Hale-Bopp) with the Nancy Radio Telescope’, Proceedings of theFirst Intern. Conf. on Comet Hale-Bopp,Tenerife.Google Scholar
  4. Crovisier, J., Leech, K., Bockelée-Morvan, D., Brooke, T.Y., Hanner, M.S., Altieri, B., Keller, H.U.,and Lellouch, E.: 1997, ‘The Spectrum of Comet Hale-Bopp (C/1995 O1) Observed with theInfrared Space Observatory at 2.9 AU from the Sun’, Science 275, 1904–1907.CrossRefADSGoogle Scholar
  5. Crovisier, J.: 1998, ‘Infrared Observations of Volatile Molecules in Comet Hale-Bopp'Proceedingsof the First Intern. Conf. on Comet Hale-BoppTenerife.Google Scholar
  6. Enzian, A., Klinger, J., and Cabot, H.:1998, ‘Simulation of the water and carbon monoxide of cometHale-Bopp using a quasi 3D nucleus model’, Planet. Space Sci. 46, 851–858.CrossRefADSGoogle Scholar
  7. Jorda, L., Rembor, K., Lecacheux, J., Colom, P., Colas, F., Frappa,E.,and Lara, L.M.: 1998, ‘TheRotational Parameters of Hale-Bopp (C/1995 O1) from Observations of the Dust Jets at Pic duMidi Observatory’, Earth Moon and Planets, in press.Google Scholar
  8. Prialnik, D., Egozi, U., Bar-Nun, A., Podolak, M., and Greenzweig, Y.: 1993, ‘On Pore Size andFracture in Gas-Laden Comet Nuclei’, Icarus 106, 499–507.CrossRefADSGoogle Scholar
  9. Weaver, H.A., Feldman, P.D., A'Hearn, M.F., Arpigny, C., Brandt, J.C., Festou, M.C., Haken, M., McPhate, J.B., Stern, S.A.,and Tozzi, G.P.: 1997, ‘The Activity and Size of the Nucleus ofComet Hale-Bopp’, (C/1995 O1) Science 275, 1900–1904.CrossRefADSGoogle Scholar
  10. Weaver, H.A., Feldman, P.D., A'Hearn, M.F., Arpigny, C., Brandt, J.C, and Stern, S.A.: 1998, ‘HubbleSpace Telescope Observations of Comet Hale-Bopp’, Proceedings of the First Intern. Conf. on Comet Hale-Bopp, Tenerife.Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • E. Kührt

There are no affiliations available

Personalised recommendations