NICMOS/HST post-perihelion images of comet Hale-Bopp in outburst

D. McCarthy; S. Stolovy; S. Kern; G. Schneider; A. Ferro; H. Spinrad; J. Black; B. Smith

doi:10.1023/a:1006209302147

NICMOS/HST post-perihelion images of comet Hale-Bopp in outburst

D. McCarthy, S. Stolovy, S. Kern, G. Schneider, A. Ferro, H. Spinrad, J. Black, B. Smith

Steward Observatory

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Near-infrared images of comet Hale-Bopp (C/1995 O1) were obtained from NICMOS/HST on UT August 27-28, 1997, when the comet emerged from the 50 degree solar elongation limit at 2.99 AU from Earth. Diffraction-limited images were obtained with camera 2 filters centered at 1.87, 1.90, 2.04 and 2.22 μm with ~0.2″ resolution (0.076″/pixel; 165 km/pixel). Over the 1.7-hour baseline of observation, a recent (<7 hours) outburst is seen in the form of an expanding spiral arm with a projected expansion velocity of ~80 m/s. Other asymmetric features include a jet emanating from the nucleus and several static linear features. Comparisons of the flux distribution in the 2.04 and 2.22 μm filters indicate that the region near the nucleus exhibits a slight, ~3%, water ice absorption.

Original language	English (US)
Pages (from-to)	243-249
Number of pages	7
Journal	Earth, Moon and Planets
Volume	78
Issue number	1-3
DOIs	https://doi.org/10.1023/a:1006209302147
State	Published - 1997

ASJC Scopus subject areas

Astronomy and Astrophysics
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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10.1023/a:1006209302147

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title = "NICMOS/HST post-perihelion images of comet Hale-Bopp in outburst",

abstract = "Near-infrared images of comet Hale-Bopp (C/1995 O1) were obtained from NICMOS/HST on UT August 27-28, 1997, when the comet emerged from the 50 degree solar elongation limit at 2.99 AU from Earth. Diffraction-limited images were obtained with camera 2 filters centered at 1.87, 1.90, 2.04 and 2.22 μm with ~0.2″ resolution (0.076″/pixel; 165 km/pixel). Over the 1.7-hour baseline of observation, a recent (<7 hours) outburst is seen in the form of an expanding spiral arm with a projected expansion velocity of ~80 m/s. Other asymmetric features include a jet emanating from the nucleus and several static linear features. Comparisons of the flux distribution in the 2.04 and 2.22 μm filters indicate that the region near the nucleus exhibits a slight, ~3%, water ice absorption.",

author = "D. McCarthy and S. Stolovy and S. Kern and G. Schneider and A. Ferro and H. Spinrad and J. Black and B. Smith",

year = "1997",

doi = "10.1023/a:1006209302147",

language = "English (US)",

volume = "78",

pages = "243--249",

journal = "Earth, Moon and Planets",

issn = "0167-9295",

publisher = "Springer Netherlands",

number = "1-3",

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TY - JOUR

T1 - NICMOS/HST post-perihelion images of comet Hale-Bopp in outburst

AU - McCarthy, D.

AU - Stolovy, S.

AU - Kern, S.

AU - Schneider, G.

AU - Ferro, A.

AU - Spinrad, H.

AU - Black, J.

AU - Smith, B.

PY - 1997

Y1 - 1997

N2 - Near-infrared images of comet Hale-Bopp (C/1995 O1) were obtained from NICMOS/HST on UT August 27-28, 1997, when the comet emerged from the 50 degree solar elongation limit at 2.99 AU from Earth. Diffraction-limited images were obtained with camera 2 filters centered at 1.87, 1.90, 2.04 and 2.22 μm with ~0.2″ resolution (0.076″/pixel; 165 km/pixel). Over the 1.7-hour baseline of observation, a recent (<7 hours) outburst is seen in the form of an expanding spiral arm with a projected expansion velocity of ~80 m/s. Other asymmetric features include a jet emanating from the nucleus and several static linear features. Comparisons of the flux distribution in the 2.04 and 2.22 μm filters indicate that the region near the nucleus exhibits a slight, ~3%, water ice absorption.

AB - Near-infrared images of comet Hale-Bopp (C/1995 O1) were obtained from NICMOS/HST on UT August 27-28, 1997, when the comet emerged from the 50 degree solar elongation limit at 2.99 AU from Earth. Diffraction-limited images were obtained with camera 2 filters centered at 1.87, 1.90, 2.04 and 2.22 μm with ~0.2″ resolution (0.076″/pixel; 165 km/pixel). Over the 1.7-hour baseline of observation, a recent (<7 hours) outburst is seen in the form of an expanding spiral arm with a projected expansion velocity of ~80 m/s. Other asymmetric features include a jet emanating from the nucleus and several static linear features. Comparisons of the flux distribution in the 2.04 and 2.22 μm filters indicate that the region near the nucleus exhibits a slight, ~3%, water ice absorption.

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ER -

NICMOS/HST post-perihelion images of comet Hale-Bopp in outburst

Abstract

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