Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements

Details Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b.381e&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 381-384 (SEE N

Astronomy and Astrophysics

Astronomy

Comet Nuclei, Halley'S Comet, Infrared Spectroscopy, Size Determination, Temperature Measurement, Vega Project, Astronomical Spectroscopy, Crusts, Surface Temperature

Scientific paper

The infrared thermal emission of the nucleus of Halley's comet was measured by the imaging channel of the IKS spectrometer in two wavelengths bands (7 - 10 μm and 9 - 14 μm) and in two perpendicular directions of analysis. The effective dimensions of the infrared emissive region in these directions are estimated from a simulation of the flyby configuration, and then compared to observations made in the visible range. A colour temperature larger than 360K was deduced using on-ground preflight calibrations. A temperature of the same order is also obtained independently, comparing the absolute value of the measured fluxes with model simulations. Such temperatures, significantly higher than the sublimating temperature of ices, are compared with surface temperatures predicted by the friable sponge model of cometary nucleus (Horanyi et al., 1984), suggesting the existence of a dust mantle layer covering at least some parts of the nucleus surface, even at 0.8 A.U.

Affiliated with

Also associated with

No associations

Rating

Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature and size of the nucleus of Halley's Comet deduced from IKS infrared VEGA 1 measurements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1122982