Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User
Darren Drake
Pooh-Bah
Reged: 10/09/02
Posts: 1022
Loc: Illinois
|
|
Is there a starmap out there with the M31 globs plotted out? I would like to give them a shot next new moon. Thanks!
--------------------
Astronomy educator
Sidewalk astronomer
18 inch f4.42 dob on eq platform w ST120 f/5 finder
8 inch f/6 dob
8 inch f/8 eq planetkiller
William Optics red 10th Anniversary 80mm FD
24lb eyepiece box
Cernan Space Center astronomer
Member of Northwest Suburban Astronomers
|
Steven Aggas
sage
Reged: 04/15/08
Posts: 287
Loc: Arizona
|
|
Hi Darren, here is a web page . Also, Megastar has them charted....
Hope that helps.
Steven
--------------------
Mr. Wizard
Elements in Harmony I, an 8"f6 German Equatorial - Stellafane Winner,
II a 20"f4.2 Newt-Dob - Astrofest Winner,
III a 6"f3.5 Finder/Newt-Dob, and
IV a 36"f4.5 Newt-Dob - "If it's up there, it's in here."
www.DarkSkyObserving.com
|
stevecoe
"The Astronomical Tourist"
Reged: 04/24/04
Posts: 2097
Loc: Arizona, USA
|
|
Darren;
Several years ago we found the three or four brightest using my friend's 14 inch at something like 250X on a good night. I would think that you could match that pretty easily with the 18 inch.
Obviously, you will be doing this in the early morning, the seeing ought to be steady then.
Have fun;
Steve Coe
--------------------
150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
Author "Deep Sky Observing" Springer-Verlag
Author "Nebulae and How to Observe Them" Springer
New Canon Xt astrocamera with Hutech modification
|
sgottlieb
sage
Reged: 07/22/07
Posts: 232
Loc: SF Bay area
|
|
And the entire Hodge Atlas of M31 is available online at
http://nedwww.ipac.caltech.edu/level5/ANDROMEDA_Atlas/frames.html
Using the hard copy of this atlas as well as MegaStar charts, I've logged 38 globulars in M31 with my 18-inch. The brighter ones display a very small disc in good seeing and high power, but generally you're just identifying mag 15 or 16 "stars" using the charts.
You also might want to check out this observing article I wrote several years back ...
http://www.astronomy-mall.com/Adventures.In.Deep.Space/gcm31.htm
--------------------
Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space - New article on MASH planetaries
7500+ NGC/IC Visual Descriptions
NGC/IC Project
|
RRaubach
AstroCowboy
Reged: 01/26/05
Posts: 2173
Loc: Douglas (Converse County),WY
|
|
Steve-
I really appreciated your article several years back; it actually started me on seeking out the M31 globs. I used the coordinates that you furnished to make up my own chart in SkyMap Pro. Using my Discovery 12.5". I was able to bag G76 (easiest), G119, G213, G219 (Mayall IV), G233, G272, and G280. With a UWAN 4 mm e.p., many of these exhibited tiny disks using AV. I recall one extremely clear and dark night in particular; I was going after G213, and noticed an object not on my user-generated star chart within the field. It had a distinctly non-stellar appearance. I marked the position on the chart, and wow! I stumbled onto G233!
I LOVE going after M31 globulars, and hope that I have time this Fall to increase my bag limit. I will finally get my Parallax 14.5" into use.
Cheers!
--------------------
Rodger
Meade SN-10 (UHTC) on Tak EM-200 mount/Antares rotating rings. Moonlite focuser.
Parallax 14.5" Newtonian on HD 200 mount (arriving soon!) w/ conical Royce mirror.
TMB 203 f/7 APO refractor on Tak NJP-160 mount.
Discovery 12.5" PDHQ
Schneider 18x80 "Flakfernrohr" binoculars/tripod mounted. Canon 15x50 IS binoculars
Unihedron Sky Quality Meter
|
sgottlieb
sage
Reged: 07/22/07
Posts: 232
Loc: SF Bay area
|
|
Quote:
Steve-
I really appreciated your article several years back; it actually started me on seeking out the M31 globs. I used the coordinates that you furnished to make up my own chart in SkyMap Pro. Using my Discovery 12.5". I was able to bag G76 (easiest), G119, G213, G219 (Mayall IV), G233, G272, and G280. With a UWAN 4 mm e.p., many of these exhibited tiny disks using AV. I recall one extremely clear and dark night in particular; I was going after G213, and noticed an object not on my user-generated star chart within the field. It had a distinctly non-stellar appearance. I marked the position on the chart, and wow! I stumbled onto G233!
I LOVE going after M31 globulars, and hope that I have time this Fall to increase my bag limit.
I'm really glad to hear that article got you started on hunting down globs in M31. I just went back and updated the original article with more recent observations, so there are now observations and data on 37 globular clusters and 10 clusters/associations.
As far as increasing that total -- check out the link in the article for "M31 Globular Catalog in Excel" (also available on this page). I included all globs with a V mag of 16.0 or brighter (75 objects), so there should be plenty of targets to keep anyone busy. The clusters close to the core are the real toughies against the bright background glow so you have to be careful when comparing magnitudes.
--------------------
Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space - New article on MASH planetaries
7500+ NGC/IC Visual Descriptions
NGC/IC Project
|
David Knisely
Postmaster
Reged: 04/19/04
Posts: 6632
Loc: Beatrice, Nebraska
|
|
Quote:
Is there a starmap out there with the M31 globs plotted out? I would like to give them a shot next new moon. Thanks!
There are a number of star charts which plot them, most notably, the quality chart of M31 in the book OBSERVING HANDBOOK AND CATALOG OF DEEP-SKY OBJECTS by Luginbuhl & Skiff (c. 1989 Cambridge University Press), p. 17-18. The authors identify 30 of the brightest globulars associated with M31 between magnitudes 14.2 and 15.8 with magnitude data provided (something other charts don't often do). However, by far, the easiest globular cluster bound to M31 is G1 (Mayall II), which sits at magnitude 13.7 and is some distance southwest of the galaxy (R.A. 0h 32m 46.3s, Dec. +39deg 34' 41"). This one has been seen in a good six inch aperture, and in my 10 inch Newtonian at high power shows up as a tiny faint fuzzy spot that is slightly brighter towards the center. Good luck and clear skies to you.
--------------------
David W. Knisely
Hyde Memorial Observatory
http://www.hydeobservatory.info
|
stevek
Pooh-Bah
Reged: 04/16/06
Posts: 1210
Loc: west michigan
|
|
http://www.cloudynights.com/item.php?item_id=1559
this is a link to Tom Trussock's Small Wonders Deep Andromeda (CN article) with a bunch of M31 globs reviewed. It may be a help to you.
Clear skies & good luck.
Steve
--------------------
DSO 8" f6 DOB w/ 8x50 RACI & 2"Crayford
1958 Sears Discoverer 76mm Refractor
GSO SV 30mm 2",21mm Hyp,13mm Strat,BO/TMB ver2-6mm & 4mm
1.25"Filters: DGM-NPB, 25%ND
1.25" plossls: 25mm,20mm,15mm,9mm
Orion 2X Shorty Barlow
Garrett Gemini LW 11x56mm binocs
BTG-10 4.0mW green laser pointer
"What is that burning in the sky? Tell me y'all..." Jeff Beck/Jan Hammer
|
RRaubach
AstroCowboy
Reged: 01/26/05
Posts: 2173
Loc: Douglas (Converse County),WY
|
|
Hi Steve;
I just read your updated observations of the M31 Globular clusters paper.Upon reading it , I realized that I have also bagged G73 in M110.
For others, it should be mentioned that use of high magnifications is essential. Most of my observations are at 387x. I'm anxious for Fall to arrive, and I should finally get my observatory back into operation with the Parallax 14.5" Newtonian in service.
My personal magnitude limit in the 12.5" Discovery topped out at V=15.5, and I expect to go about 0.3 magnitues deeper in the Parallax.
Of the M31 globs that I have observed, I found G219 (Mayall IV)the most elusive, and G233 was very tough.
--------------------
Rodger
Meade SN-10 (UHTC) on Tak EM-200 mount/Antares rotating rings. Moonlite focuser.
Parallax 14.5" Newtonian on HD 200 mount (arriving soon!) w/ conical Royce mirror.
TMB 203 f/7 APO refractor on Tak NJP-160 mount.
Discovery 12.5" PDHQ
Schneider 18x80 "Flakfernrohr" binoculars/tripod mounted. Canon 15x50 IS binoculars
Unihedron Sky Quality Meter
|
|
5 registered and 3 anonymous users are browsing this forum.
Moderator: matt, Olivier Biot
Print Thread
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Thread views: 347
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
