#1
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Antares
Hi,
Some weeks ago I tried to split Antares with my Vixen 114/600 ED Refractor at 150x, with blue filter, but I'm not sure it was successful. It seemed to me that the 5,4 mag companion was positioned on the first diffraction ring of the primary. Also, the air was not very steady. I'd like to learn if anyone managed to split Antares, and with which equipment ? Clear skies, Volker |
#2
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I'd like to learn if anyone managed to split Antares, and with which
equipment ? splitting Antares is not a difficult because of aperture or separation. it's more a matter of steady conditions and it's altitude in your local sky. north of 40deg latitude it gets tough, but from places like arizona it's been split with 80-90mm. YMMV |
#3
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"SaberScorpX" wrote in message ... I'd like to learn if anyone managed to split Antares, and with which equipment ? splitting Antares is not a difficult because of aperture or separation. it's more a matter of steady conditions and it's altitude in your local sky. north of 40deg latitude it gets tough, but from places like arizona it's been split with 80-90mm. YMMV What is the separation between the two in arcseconds? |
#4
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Also, the air was not very steady.
I'd like to learn if anyone managed to split Antares, and with which equipment ? Hi: I've never tried it in a refractor of this aperture, but it can be fairly easy in a 6 inch Newtonian at high magnification. _When the seeind is good_; that's the key. Peace, Rod Mollise Author of _Choosing and Using a Schmidt Cassegrain Telescope_ Like SCTs and MCTs? Check-out sct-user, the mailing list for CAT fanciers! Goto http://members.aol.com/RMOLLISE/index.html |
#5
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splitting Antares is not a difficult because of aperture or separation.
it's more a matter of optical quality, steady conditions, and it's altitude in your local sky. north of 40deg latitude it gets tough, but from places like arizona it's been split with 80-90mm. YMMV What is the separation between the two in arcseconds? 2.6". companion is at P.A. 274 |
#6
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What is the separation between the two in arcseconds? 2.6". companion is at P.A. 274 Is PA clockwise or counter clockwise from 0 to 360? |
#7
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Is PA clockwise or counter clockwise from 0 to 360?
Clockwise and counter-clockwise are confusing, because they depend on whether you're looking through a telescope with a star diagonal. Instead, position angle is interpreted as follows: 0 = secondary is north of primary 90 = secondary is east of primary 180 = secondary is south of primary 270 = secondary is west of primary Those directions are celestial north, east, etc. In a refractor or compound scope with a star diagonal, position angle generally increases in a clockwise direction. In a Newtonian reflector, it increases in a counter-clockwise direction. But I imagine there may be some odd cases. Brian Tung The Astronomy Corner at http://astro.isi.edu/ Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/ The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/ My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt |
#8
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2.6". companion is at P.A. 274
Of course what makes it difficult is that the brighter of the two is magnitude 1.1 while the companion is magnitude 5.4. It takes good seeing.. jon |
#9
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"Jon Isaacs" wrote in message ... 2.6". companion is at P.A. 274 Of course what makes it difficult is that the brighter of the two is magnitude 1.1 while the companion is magnitude 5.4. It takes good seeing.. jon In other words, GLARE |
#10
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"Brian Tung" wrote in message ... Is PA clockwise or counter clockwise from 0 to 360? Clockwise and counter-clockwise are confusing, because they depend on whether you're looking through a telescope with a star diagonal. Instead, position angle is interpreted as follows: 0 = secondary is north of primary 90 = secondary is east of primary 180 = secondary is south of primary 270 = secondary is west of primary Those directions are celestial north, east, etc. In a refractor or compound scope with a star diagonal, position angle generally increases in a clockwise direction. In a Newtonian reflector, it increases in a counter-clockwise direction. But I imagine there may be some odd cases. Perfect answer. Thanks. |
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