[Prev][Next][Index][Thread]
Re: (IAAC) stars in ngc 604
Hi Mark !
Impressive observing report and a nice sketch!
you wrote:
>Jens reports that the
>brighter members are about mag. 16. At the time
>of the observation I was very excited to be
>observing a nebula in another galaxy. I didn't
>dream of ever being able to see an individual
>star in another galaxy. When I first got started
>in astronomy about 10 or 12 years ago I remember
>reading that it was not possible to see
>individual stars in other galaxies, even with
>large scopes. Now it appears that this may
>indeed be possible. This is very exciting!
Yes indeed! But there are much more individual stars in other galaxies to
observe... Try AF Andromedae in M 31. This star is one of the rare LBV stars
(luminous blue variables). These stars have absolute magnitudes of -7,5mag
to - 9,5mag. The brightest one can be found in the southern part of M 31 and
its apparent magnitude is 16,5mag. There was an observing report from Martin
Nitzl in interstellarum 10 who was able to see the star using a 13incher!
Just try to see individual stars in NGC 206, the giant starcloud (the
biggest in our local group). The brightest stars (LBV, too) are shining at
~17th magnitudes. 70 stars are known in NGC 206. It will be difficult to
resolve the stars from the background glow of unresolved stars. Alan Whitman
posted a positive result on Amastro. he managed to see this stars in his
16incher. I tried it several times with my 20incher but I hadn´t the perfect
night for higher magnifications.
Another challenge for _very big scope users_ is resolving stars in local
group galaxies. For example, last year I had the idea to resolve stars in
Leo 1 visually with my 20incher but I must recognize that my scope is a
little bit too small... The brightset stars are +18mag (except 2 stars
brighter than 18mag) I selected these references:
1994MNRAS.266....7D DEMERS, S., IRW...
1991AJ....101.1299R REID, N., MOULD...
1993AJ....106.1420L LEE, M. G., FRE...
I believe there are much more stars in galaxies which can be resolved (M 33,
NGC 68222 and so on). Let me hear about your results.
Best regards, Jens
----------------------------------------------------------------------
MAGELLAN
das unabhängige Beobachterforum
http://www.beobachterforum.de.
----------------------------------------------------------------------
-----Ursprüngliche Nachricht-----
Von: deepsky <deepsky@usmo.com>
An: Big dob <bigdob-l@ucsd.edu>; IAAC Discussion List
<netastrocatalog-announce@jovian.com>
Datum: Sonntag, 17. September 2000 07:28
Betreff: (IAAC) stars in ngc 604
>I finally got to spend a few nights out under the
>stars with the scope! I made several drawings
>and will post them on my web site over the next
>week or two as time allows. The first is of ngc
>604. For those of you on the big dob list it can
>be seen at
>http://members.fortunecity.com/faintfuzzy/drawings.htm
>Jens Bohle reported seeing several stars in the
>star cluster associated with ngc 604 using 16"
>and 20" scopes. I'm not sure whether or not I
>saw them. Anyone know of a web site or book with
>a chart showing the positions of the brighter
>stars in this cluster? Jens reports that the
>brighter members are about mag. 16. At the time
>of the observation I was very excited to be
>observing a nebula in another galaxy. I didn't
>dream of ever being able to see an individual
>star in another galaxy. When I first got started
>in astronomy about 10 or 12 years ago I remember
>reading that it was not possible to see
>individual stars in other galaxies, even with
>large scopes. Now it appears that this may
>indeed be possible. This is very exciting!
>
>Mark
>To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at:
>http://www.tiac.net/users/lewkaren/netastrocatalog/subscribe.html
>
To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at:
http://www.tiac.net/users/lewkaren/netastrocatalog/subscribe.html