NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Lyman-alpha observations of Comet Kohoutek 1973 XII with CopernicusComet Kohoutek 1973 XII was observed with a telescope-spectrometer on the Copernicus satellite on six occasions over a 1-month period starting on January 29, 1974. Positive detection of the cometary Ly-alpha emission profile was obtained on January 29 and February 2. Earlier observations of the geocoronal Ly-alpha emission profile allowed an instrumental intensity calibration and confirmation of the computed instrumental profile for an extended source at the Ly-alpha wavelength. After allowing for broadening by the instrument, a hydrogen-outflow velocity of about 10.6 km/s is derived from the width of the Ly-alpha emission on January 29. The intensity calibration combined with an appropriate cometary model led to cometary water-production rates for January 29 and February 2. Only upper limits were obtained for Ly-alpha on and after February 14. Searches for OH and D led to negative results.
Document ID
19760063809
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Drake, J. F.
(Centre National de la Recherche Scientifique Verrieres-Le Buisson, France)
Jenkins, E. B.
(Princeton University New Observatory, Princeton, N.J., United States)
Bertaux, J. L.
(CNRS, Service d'Aeronomie, Verrieres-le-Buisson Essonne, France)
Festou, M.
(Centre National de la Recherche Scientifique Verrieres-Le Buisson, France)
Keller, H. U.
(Centre National de la Recherche Scientifique Verrieres-Le Buisson, France)
Date Acquired
August 8, 2013
Publication Date
October 1, 1976
Publication Information
Publication: Astrophysical Journal
Volume: 209
Subject Category
Astronomy
Accession Number
76A46775
Funding Number(s)
CONTRACT_GRANT: NAS5-1810
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available