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M31's other satellite galaxies
I saw NGC 185 for the first time last night and have to tell you all about it.
I have, as yet, no GOTO or DSC, so everything I find is by hunting. I had not searched for 185 or 147 very hard because I had read they were difficult and presumed they were out range for my instrument and climate (the murky midwest). But Burnham says it is possible to see them with a 6", so I gave it another shot. Telescope: 6" f/8 Synta refractor at 43x, giving about a 1.2 degree field. Mounting: tall wooden tripod with a dobsonian cradle, a la Richard Berry. I use a Rigel unit-power finder. Sky: mag 5. Using some charts, I scanned straight west from phi And to omicron and pi Cas, then noticed that both were visible to the naked eye and I could have started there. They are aligned N-S and there is a 5.6 mag star between them, closer to omicron on the north. NGC 185 is at the opposite edge of a 1.2 degree field to the west of omicron. Large, with low surface brightness, this was difficult to see at first, but became more obvious with time. The altitude was increasing and possibly the night was improving. I could not see 147, which should be a similar distance from 185 to the west. Most references say it is more difficult, although Walter Scott Houston wrote that they seemed equal to him. So: finding 185 was pretty easy, although seeing it took some time. The secret of my success was that at the time and for that bit of sky, the E-W lines required only altitude movement with my alt-azimuth mounting. I expect I'll be able to find it again now that I know where it is. I'll keep looking for 147. It's a simple tale, but seeing an other satellite of M31 was more exciting than I can easily explain. I expect most saa readers will understand. -Bill -- Sattre Press Curiosities of the Sky http://sattre-press.com/ by Garrett Serviss http://sattre-press.com/csky.html |
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Hi Bill,
I've had a hard time finding NGC 147 as well. These are my notes=20 while searching with my Tele Vue 76 from the Joshua Tree desert in July... North of Andromeda in Cassiopeia are three little=20 galaxies... NGC 185, 147 and 278. 185 is fairly easy=20 but could not see 147. I was a bit surprisingly to=20 see little 278. Very small, but unmistakable in the=20 10mm Radian at 48x.=20 My TV76 is alt-az mounted as well. -Florian |
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I could not see 147, which should be a similar distance from 185 to the
west. Most references say it is more difficult, although Walter Scott Houston wrote that they seemed equal to him. I'll keep looking for 147. Those mag5 skies are definitely making 147 tougher in a 6inch. 147 is only another field west of 185, but it's brightness is spread over a slightly larger area. And it doesn't have the bright core that 185 has. Bumping up the power will probably help as well. Check the two out for comparison he http://www.seds.org/~spider/ngc/ngcic.cgi?NGC185 http://www.seds.org/~spider/ngc/ngcic.cgi?NGC147 (click the data tabs) Happy Hunting, SSX |
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In the TV show Stargate Atlantis our intrepid hero archetypes travel through manufactured wormholes to this impressively-named land, far far away. I know that recently more satellites have been detected, but.. Is there a "genuine" dwarf galaxy behind the stars of Pegasus? That direction is below the Plane, so how could a galaxy hide there? Tia, Sheep |
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If you shine a flashlight back and forth across Ursa Major, far above our galaxy's plane, some of those photons will travel for a google google years as our universe continues to expand. Try it tonight. You will be the source of a truly cosmic event! Nothing else you will ever do will have the likely potential to mean so much. Defender |
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In article
, Sheep defender wrote: Is there a "genuine" dwarf galaxy behind the stars of Pegasus? That direction is below the Plane, so how could a galaxy hide there? It seems so. http://antwrp.gsfc.nasa.gov/apod/ap990122.html But most reports I see have it as being a satellite of the Andromeda galaxy (M31), not of the Milky Way. -- Aidan Karley, Aberdeen, Scotland, Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233 |
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sheep defender:
Nothing else you will ever do will have the likely potential to mean so much. What a sorry existence this dodo has. PLONK! Davoud -- usenet *at* davidillig dawt com |
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"sd" == sheep defender writes:
sd I know that recently more satellites have been detected, but.. sd Is there a "genuine" dwarf galaxy behind the stars of Pegasus? See URL:http://antwrp.gsfc.nasa.gov/apod/ap990122.html for a picture of the Pegasus dwarf spiral galaxy. sd That direction is below the Plane, so how could a galaxy hide sd there? Once you see the picture, I think you'll understand. Dwarf galaxies can be fairly diffuse. One of the challenges can be identifying a group of stars as a dwarf galaxy versus a collection of stars within the Milky Way. -- Lt. Lazio, HTML police | e-mail: No means no, stop rape. | http://patriot.net/%7Ejlazio/ sci.astro FAQ at http://sciastro.astronomy.net/sci.astro.html |
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"sheep defender" wrote in message
... If you shine a flashlight back and forth across Ursa Major, far above our galaxy's plane, some of those photons will travel for a google google years as our universe continues to expand. Try it tonight. You will be the source of a truly cosmic event! Nothing else you will ever do will have the likely potential to mean so much. "sheep defender" wrote in message ... In article , wrote: sheep defender: Nothing else you will ever do will have the likely potential to mean so much. What a sorry existence this dodo has. PLONK! Davoud What are you eleven? If you didn't understand what I posted, just ask. Maybe someone will help you.. Perhaps he said what he did because he did understand. What meaning is there in sending a few photons into space that will never be detected again? Most of the rest of us do things every day that have vastly more significance, like eat breakfast or sneeze. YMMV. George |
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