Astronomy educator/Sidewalk astronomer
Owner of Astronomy Delight franchise
18 inch f4.42 Dob on eq platform w ST120 f/5 finder
12 inch Zhumell Dob
8 inch f/6.9 home made Dob with Seevers optics
William Optics red 10th Anniversary 80mm FD
C8 XLT on Vixen GPDX
26lb eyepiece box
Cernan Space Center astronomer
Member of Northwest Suburban Astronomers
C-11 SCT, XT10i Dob, C-6 SCT, ETX125PE Mak-Cass, TV102, & AT66
"We the People are the rightful master of both congress and the courts - not to overthrow the constitution, but to overthrow the men who pervert the constitution." Abraham Lincoln"
The heavens declare the glory of God; the skies proclaim the work of his hands." Psalms 19:1
My Blog http://buddybarbee.wordpress.com
Quote:Also magnitudes for Galaxies and Globular Clusters are if the object were stellar
Quote:once an object is more then a star that light is spread out.
Quote:Lastly Magnitude can be in various wavelengths, that is why some objects are not as tough as the listed Magnitude suggests.
Quote:There is a good article on this, it is by Jay Reynolds Freeman,
Quote:It seems as the the dimmer globs such as NGC 5053 which is listed at around mag 9.5 is MUCH more challenging to see than a 9.5 mag galaxy. I've come to expect it to be a pretty difficult challenge to spot an 8th or 9th magnitude globular but a similar magnitude galaxy would be easy pickins.
First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
A man is a small thing, and the night is very large and full of wonders.
Quote:NGC 5053 is a bit of an oddball when it comes to globular clusters.Dave Mitsky
Quote:Quote:NGC 5053 is a bit of an oddball when it comes to globular clusters.Dave Mitsky Yes it is .
Chuck D. Clawson, MI, USAProud owner of: Orion XT10i w/ Moonlite focuser & ZOC mirror, Celestron Ultima 8 PEC, Celestron C5+, Meade 90mm f/11 achromat (Model #390), and some random accessories (see bio).
Quote:Quote:It seems as the the dimmer globs such as NGC 5053 which is listed at around mag 9.5 is MUCH more challenging to see than a 9.5 mag galaxy. I've come to expect it to be a pretty difficult challenge to spot an 8th or 9th magnitude globular but a similar magnitude galaxy would be easy pickins.Actually, by and large I expect a 9th-magnitude globular cluster to be easier to spot than a galaxy of equal magnitude. There are obvious exceptions, like NGC 5053. But there are also many galaxies with truly low surface brightness -- ones that make NGC 5053 look like a blinding spotlight by comparison.Among the Messier galaxies, M33 and M101 are the most obvious examples. But the real toughies are the Local Group dwarf galaxies. Start with NGC 6822, Barnard's Galaxy, which is one of the easiest. After that you can tackle real toughies like IC 1613 or the Sextans or Draco Dwarfs. All of those are 9th magnitude or brighter, and all of them are utterly invisible unless your skies are pristine -- and quite likely even then.
Tom Polakis Tempe, AZ Visual observing, DSLR photography, lunar & planetary imaging http://www.pbase.com/polakis/
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
Quote:I'm with the original poster in typically seeing galaxies more easily than globulars of the same magnitude . . .I'll buy into the explanation given in this thread that the surface brightness of a galaxy is typically more peaked in the center, and that's what gets picked up in small scopes or under a bright sky. Globular clusters are typically more broadly concentrated . . .When you get down to the level of 11th magnitude globular clusters, my 18-inch has a problem with many of them, while a galaxy of 11th magnitude is still bright enough to possibly show some structure.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:Among the Messier galaxies, M33 and M101 are the most obvious examples. But the real toughies are the Local Group dwarf galaxies. Start with NGC 6822, Barnard's Galaxy, which is one of the easiest. After that you can tackle real toughies like IC 1613 or the Sextans or Draco Dwarfs. All of those are 9th magnitude or brighter, and all of them are utterly invisible unless your skies are pristine -- and quite likely even then.
Quote:I've tried 6822 a couple times with no success. If you have the info, what instrument did you use to see it, the eyepiece, magnification and how were the skies (color zone)?
16.5 inch f 5.3 Zambuto optics homebuilt Dob
8 inch f 8 homebuilt Dob
Fraser Valley Astronomers Society Director
Quote:Like M33, the visibility of NGC 6822 depends a lot more on sky darkness than on aperture.
Quote:In my experience, M33 is not so difficult ... I think NGC 6822 must be appreciably more difficult.
Telescopes: Celestron 14" SCT..Meade 10" ACF/SCT..Stellarvue 4" ED APO Mounts: UA UniStar Deluxe duel clamping saddle on a Celestron CGE tripod...UA UniStar Deluxe on a Meade field tripod and a UA UniStar Light on a UA light surveyor tripod. All with custom made "Manny Miles" eyepiece trays. Binoculars: Garrett Optical 10x50 Oberwerk 15x60. Eyepieces: TV Naglers, and Plossl's. Also Pentax 20XW, a Baader 31 Aspheric and a TMB 40 Paragon.
Quote:This is one galaxy that I have been trying to observe for a few years now, but with no success. I have viewed the Little Gem nebula many times, but never Barnards galaxy..at least I don't think I have. Does it show just a more densely packed group of stars? Is there any nebuloscity? I have used scopes up to a Meade 12 and C14 in a yellow zone. I don't have goto, as I star-hop to my targets. Thanks..Bill