[sac-forum] Re: Heads Up for Observing
- From: "Richard Harshaw" <rharshaw2@xxxxxxx>
- To: <sac-forum@xxxxxxxxxxxxx>
- Date: Wed, 21 Sep 2011 11:32:12 -0700
My observations follow:
Last Call
Pegasus
By Richard Harshaw
All sites are suburban unless otherwise noted
NGC 7839
========
Not found. Not in the WDS either. See attached DSS plate of area.
NGC 7839.gif
NGC 1
=====
8-inch SCT at 104x: Its axis runs SE-NW. It is a faint smudge located above
a wide pair of 10 mag pairs.
Discovered by Heinrich d'Arrest in 1861.
NGC 7084
========
Not observed.
Stephan's Test
==============
I had originally submitted an observation and DSS plate of this asterism in
the March 2011 Saguaro Skies, but deeper investigation of another DSS plate
leads me to believe I observed all AROUND this little grouping. See attached
photos. I will need to try again for the tight little E-W chain shown in
the DSS plate.
Stephan's Test Orig.gif
Stephan's Test.gif
Stephan's Test 15min.gif
NGC 7331
========
8-in SCT at 104x.
Superb! It was bright and mottled, with a N-S axis. At high power, a hint
of a dust lane emerged on the W side.
11-in SCT at 187x (15mm Lanthanum).
Wow! A long, narrow ellipse, very bright and easy; it looks a little
brighter in the S end.
Discovered by William Herschel in 1784, it is 64,000 light years in
diameter.
NGC 7331 is one of the brighter galaxies which is not included in Messier's
catalog. It exposes a fine spiral structure despite its small inclination
from the edge-on position. Several companions and background galaxies are
visible even in our photo.
NGC 7331 was among the earliest recognized spiral galaxies, and listed by
Lord Rosse in his list of 14 spiral or curvilinear nebulae discovered before
1850.
NGC 7479
========
8-in SCT at 104x.
Faint, and not helped much by high power. It looks like a NE-SW blur, with
a 13 mag star 3' N.
William Herschel discovered it in 1784.
This is a Seyfert galaxy with a nuclear jet (Laine and Gottesman, 1998).
It was discovered by William Herschel in 1784.
Supernova 1990U occurred in NGC 7479 on July 27, 1990 at 22" W and 54" S of
the galaxy's nucleus. It was detected by Pennypacker, Perlmutter and Marvin,
and reached mag 16.
Richard Harshaw
Cave Creek, Arizona
Brilliant Sky Observatory
From: sac-forum-bounce@xxxxxxxxxxxxx [mailto:sac-forum-bounce@xxxxxxxxxxxxx]
On Behalf Of AJ Crayon
Sent: Wednesday, September 21, 2011 12:24 AM
To: SAC Forum
Subject: [sac-forum] Heads Up for Observing
Just in case you need more on your observing list try these objects from
Call for Observations on for size.
Cepheus stars for a box with a triangle on top and in Greek mythology are
named after Cepheus King of Aethiopia. We visit this constellation after a
hiatus of many years. We?ll start with NGC2276 and its companion NGC2300,
both about 11th magnitude and about 4° east of Polaris. First NGC2276,
which is a late barred spiral with a ring. It is pretty large and has a
little brighter middle. Our next one is 6? to the southeast is the
elliptical galaxy NGC2300. It to is pretty large, a little elongated and
has a brighter middle. Moving well to the other side of the constellation
we continue with open clusters. First here is NGC7235, aka NGC7234, and is
listed as small, poor and a little compressed. Naturally both are
circumpolar. Next is NGC7261 and is listed as large, pretty rich and a
little compressed. Does this agree with Trumpler?s description of III 1 p?
Now on to the large, pretty rich circumpolar open cluster NGC7261. Again
Trumpler?s description is III 1 p, and do you agree or not? Keeping in the
same general area of the constellation is another circumpolar cluster
NGC7380. It is pretty large, pretty rich and involved in some nebulosity
but you will more likely than not need a UHC or OIII filter to pull it in.
This cluster is on the Herschel 400 list, part of the Cepheus OB1
association. Finally Trumpler?s description is III 3 p n. Going to the
northeast is King 19 and NGC7510, within 20? of each other. Yet they are
easy to distinguish. First check out NGC7510, another cluster on the
Herschel 400 list. It is fan shaped and has some pretty bright stars.
Trumpler gives it an II 2 m n. Look for the region of faint nebulosity to
the southeast. After this is should be easy to locate King 19, with a
Trumpler code of II 2 m. Its brightest star is listed as 12th mag. Good
luck with this one.
For October the constellation for us is Pisces particular the southern part.
You will need your galaxy observing eyes for this as that?s all in here for
us, save one asterism for variety. And we start with the asterism called
the Circlet of Pisces, which is about 5deg and is large for an eyepiece
field of view. So try your finder or binoculars. What about stellar color?
It is listed as 3rd magnitude, can you detect if naked eye? It is located
at R.A. 23 11.0 Dec +03 40. The first galaxy is NGC7541 a barred galaxy
with magnitude of 11.7. How much detail can you detect? What about the
14th mag galaxy 3? to the southwest? Moving east of 0h find NGC467. It is
almost 12th mag and small. What other interesting items do you see in a 30?
field? Turns out two of them are out next objects. About 10.5? northeast
is NGC470 a spiral galaxy with a ring and a gradually brighter middle. The
third in the same field is NGC474 and should be slightly brighter and
larger. Is it? Why or why not? Comparing the size descriptions of these 3
galaxies has the first two as large and the latter as small, yet the size
field indicates just the opposite. The reader is left to their own
decisions about this fact. Next is a Herschel 400 object NGC524, a bright
and large Sa galaxy. Continuing to the east is NGC676, another spiral
galaxy. It is listed as very faint but has a magnitude of 10.5. Getting
towards the end of this month?s selection is NGC718 another barred spiral
that is supposed to have smooth arms. What about irregular features and
brighter middle? Finally we come to NGC741, an elliptical galaxy considered
faint and small. There?s NGC742 involved, at mag 14.3 and is out of reach
of many telescopes. That?s all for now, get out observer, take notes and
send them in for inclusion into this column.
We have a peculiar situation with Pegasus. An attempt was made back in 2009
but never made it to print despite having observations sent in. So here is
what will happen. Following is a list of objects for the 2009 never before
published objects. What I want is for everyone to go out observe and send
your observations. I will combine the new ones with the 2009 ones in a big
article. Sounds good to me. Wouldn?t you agree?
Here are the objects for Pegasus the Winged Flying Horse. This
constellation is composed of mostly galaxies and a number of nice objects
still on SAC observing lists. Have already done M15 and Stephan?s Quintet
so let?s look at what?s left. We?ll start with on of the last entries in
the NGC and that is NGC7839 listed as a double star. The question, not
answered in the NGC, is magnitudes, separations and position angles. The
hope here is that more than just Richard Harshaw will give us an answer.
The description is very faint, resolved. The next entry is the first entry
in the NGC, NGC 1. It is a small galaxy with a little elongation and is
between an 11th mag and 14th mag star. Moving on, to the western part of
the constellation is NGC7084 an open cluster of about 20? that doesn?t have
a very clear description so please supply one. Next is an asterism named
Stephan?s Test, is located at RA 22 37.0 Dec +34 08 and reported as a jagged
line. How many stars do you count and what is the magnitude range? It is
17? northeast of Stephan's Quintet and was used by Stephan to test
transparency. The last two entries are galaxies, the first being NGC7331 is
barred, bright, large and elongated. What other detail is there for you?
What about the middle, mottling and dark lanes? This galaxy is on the 110
Best NGC and Herschel 400 lists so there is something there for you. Last
is NGC7479 another barred spiral that shouldn?t be as large or as bright as
the prior galaxy. Yet can you see the central bar? This one is also on the
Herschel 400 list.
Yes there are 3 sets of observations for you to decide on. All for your
enjoyment.
AJ Crayon
Phoenix, AZ
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