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The enlarged inset at upper right shows a spiral of material that looks to be coming from one end of the elongated nucelar condensation.
However, the inset at lower right, which is a polarization image (brightness proportional to the degree of linear polarization derived from the same images with the right combination of orientations of the polarizers), shows a different spiral shape that seems to start from a strongly polarized (~15%) feature (dust jet? 41K 22K Observer: David Mc David Location: Limber Observatory, Pipe Creek, Texas Date: March 29, 1997 - UT This image is a composite of eighteen 2 s exposures of the inner 5 arcmin of the coma of Comet Hale-Bopp, taken in red light (Cousins R filter with polarizers) with a Photometrics CCD camera (Thomson 512 chip) on the 0.4 m telescope at Limber Observatory. 32K Observer: Dave Schmahl Location: Mount Laguna Observatory, San Diego, California Date: March 29, 1997 UT 50mm lens at f2.8, 400 Kodak Gold, 4 min exposure, piggybacked on a motor guided C80 refractor.
A rotational gradient filter (10 degree rotaion, amplification 4) has been applied to the 60 second exposure of the Comet shown in the last image.
Fortunatly the weather is also with us, as we observed during 51 nights (and some time days! This image is one on the current day time observations, the trail of the star SAO 37166 is visible on the top. Second image: 105 mm f/2.5 camera lens Nikkor on SP Dx mount & JMI Mototrak V - Fujicolor 800 SG Plus - 5 min. 5 min in D19 & printed on paper #4=20 18 minutes of exposure, guiding by C5 on comet nucleus. 45 sec exposure, Scotch Chrome 3200 ISO, 55 mm (f/2,8) Two deep sky objects are visible: at the bottom-right, M31 (Andromeda) Galaxy; at the top-left, the Double Cluster in Perseus. 2 min exposure, Scotch Chrome 3200 ISO, 28 mm (f/4). The second picture was taken using a 50mm Nikon lens at F/D 4, in 4mn on FUJI G 800 on a motorized C5 mount. John's, Newfoundland, Canada Date: March 29, 1997 PM Canon AE1 135mm at f 5.6, 3 min exposure on Kodak Gold 1000.106K Observer: Wally Pacholka Location: Joshua Tree National Park, California Date: March 29, 1997 UT A 50mm lens was set at f/2 for 30 seconds on a tripod using Fuji 800 film.The foreground scenery was lite up by a passing car that happened by during the photo.Second image: Nikon N90 50mm at f2.0, 25 second exposure on Fuji 400HG.147K 42K Observers: Cyril Birnbaum, Eric Frappa, Jean Lecacheux, Frangois Colas Location: Pic du Midi Observatory, France Date: March 29, 1997 UT Hale Bopp in conjonction with a star during day time.