The Nucleus of Comet Hale-Bopp (C/1995 O1): Size and Activity

  title={The Nucleus of Comet Hale-Bopp (C/1995 O1): Size and Activity},
  author={Yan R. Fern{\'a}ndez},
  journal={Earth, Moon, and Planets},
  • Y. Fernández
  • Published 1 October 2002
  • Physics, Geology
  • Earth, Moon, and Planets
A review of our current understanding of Comet Hale-Bopp’s nuclear size is presented. Currently the best constraints on the effective radiusare derived from late-1996 mid-IR data and near-perihelion radio data.Unfortunately the two regimes give differing answers for the radius. A possible reconciliation of the two datasets is presented that would place the radius at around 30 km. This is a large cometary radius compared to the others that are known, and this motivates a discussion of what makes… 
Some Features of Comet Hale–Bopp (According to the Observations of 1995–1998)
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Cometary Activity at 25.7 AU: Hale-Bopp 11 Years after Perihelion*
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First attempt at interpreting millimetric observations of CO in comet C/1995 O1 (Hale-Bopp) using 3D+t hydrodynamical coma simulations
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The Activity and Size of the Nucleus of Comet Hale-Bopp (C/1995 O1)
Analysis of Hubble Space Telescope (HST) images of comet Hale-Bopp (C/1995 O1) suggests that the effective diameter of the nucleus is between 27 to 42 kilometers, which is at least three times larger
The Inner Coma and Nucleus of Comet Hale–Bopp: Results from a Stellar Occultation
Abstract We discuss the properties of the nucleus and inner coma of Comet Hale–Bopp (C/1995 O1) as derived from observations of its occultation of Star PPM 200723 on 5 October 1996, while the comet
Photometric Behavior of Comet Hale-Bopp (C/1995 O1) Before Perihelion
Narrowband photometric observations of comet Hale-Bopp (C/1995 O1) between 25 July 1995 and 15 February 1997 indicated gas and dust production rates of 20 and 100 times greater, respectively, than
A Determination of The Nuclear Size of Comet Hale–Bopp (C/1995 O1)
The signal of the nucleus was digitally extracted from six images of the innermost coma of this comet, obtained with the Hubble Space Telescope’s Wide-Field Planetary Camera 2 in the planetary mode
Dust Morphology Of Comet Hale-Bopp (C/1995 O1): I. Pre-Perihelion Coma Structures In
In 1996 comet Hale-Bopp exhibited a porcupine-like coma with straight jets of dust emission from several active regions on the nucleus. The multi-jet coma geometry developed during the first half of
Dust Morphology Of Comet Hale-Bopp (C/1995 O1). Ii. Introduction Of A Working Model
A Monte Carlo image simulation code for dust features in comets is applied to comet Hale-Bopp in order to model the object's persistent porcupine-like appearance on high-resolution images taken
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A variety of independent methods have been used to estimate the size of the nucleus of comet Hale-Bopp. Several groups have analyzed optical and infrared images of the comet and claim to detect the
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Comet Hale-Bopp has shown an extremely elevated level of dust activity during its apparition. We examine the dust activity of the comet, particularly the dust jets which were observed so frequently
Infrared Observations Of Dust Emission From Comet Hale-Bopp
We present infrared imaging and photometry of the bright, giant comet C/1995 O1 (Hale-Bopp). The comet was observed in an extended infrared and optical observing campaign in 1996–1997. The infrared
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Several broad emission features observed in the 7- to 45-micrometer region suggest the presence of silicates, particularly magnesium-rich crystalline olivine, similar to those observed inThe dust envelopes of Vega-type stars.