Patrick, I believe you had mentioned at a SLAS meeting that in a Solar System Ambassador briefing, NASA said that the impact would not be visible from Utah. Checking the JPL Ephemeris Generator, if the impact occurs as advertised at 6:00 UTC on July 4 (the evening of July 3 at midnight), Comet 9P will be very low to the horizon (18 deg. alt) with much extinction - Date_time RA Dec Az Alt 2005-Jul-04 05:00 133747.08 -093301.6 226.4 27.1 2005-Jul-04 05:10 133747.81 -093311.5 228.7 25.7 2005-Jul-04 05:20 133748.55 -093321.3 230.9 24.2 2005-Jul-04 05:30 133749.29 -093331.1 233.1 22.7 2005-Jul-04 05:40 133750.03 -093340.9 235.1 21.2 2005-Jul-04 05:50 133750.78 -093350.7 237.2 19.6 2005-Jul-04 06:00 133751.52 -093400.5 239.1 18.0 2005-Jul-04 06:10 133752.26 -093410.3 241.1 16.3 2005-Jul-04 06:20 133753.01 -093420.1 242.9 14.7 2005-Jul-04 06:30 133753.75 -093429.9 244.8 13.0 2005-Jul-04 06:40 133754.50 -093439.7 246.6 11.2 2005-Jul-04 06:50 133755.25 -093449.5 248.4 09.5 2005-Jul-04 07:00 133755.99 -093459.3 250.1 07.7 Not much to work with, but still worth a look-see. An hour's delay would make all the difference. I don't believe this ephemeris includes the one-way light travel time delay. - Canopus56 (Kurt) P.S. - Can you use your _pull_ with NASA to get them to go at 5:00 UTC instead of 6:00 UTC? -:) --- Patrick Wiggins <paw@trilobyte.net> wrote:
Many thanks. We'll check it out. Will be interesting to see if it brightens enough to notice after its encounter with Deep Impact.
Patrick
Canopus56 wrote:
Patrick, if you are using the 30" tonight, here's the position of Comet 9P for this evening from the JPL generator. Its brightness is mag 9.3 -
Time RA Dec 08:00 PM 13 04 34.30 -00 29 28.6 09:00 PM 13 04 36.72 -00 30 25.4 10:00 PM 13 04 39.14 -00 31 22.2 11:00 PM 13 04 41.58 -00 32 19.0 12:00 AM 13 04 44.03 -00 33 15.8
- Canopus56 (Kurt)
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