Archive for July 17, 2025

NGC 6118: Galaxy In Serpens Caput The Most Difficult Object In The Herschel 400 List – Update: July 17th 2025

July 17, 2025

March 26th 2025: After the problems I’ve had over a couple of years I just had to observe galaxy NGC 6118, again in 2025. So, during the late afternoon of March 26th, I set my mount up and pinned my auto-marine fabric to wires to create my light block system in my backyard.

I need or require this (wires and cloth) and in this part of my backyard for southern hemisphere objects only.

3:45 AM: I minimized everything I’d require for an early morning observing session. I included three selected eyepieces in my small Pelican box, not wanting to bring a large box. And I brought all of my necessary items or tools in a small zipper bag: This included pencils, sketch cards, set-up stars, red lights, the large S&T Pocket Alas and other.

When making an early morning observation, it’s important to have everything ready, without the need to run back inside for necessary tools and items forgotten.

4:15 AM: I was looking in the eyepiece and in the area of the galaxy using an 11mm 82º apparent field eyepiece, for a magnification of 104x and a 0.79º true field. I began using field motion and then letting the galaxy drift back into the eyepiece field, and could see a faint elongated blur, with averted vision, but not constantly.

4:45 AM: Increasing the magnification, so I used 2.8x University Optics Klee Barlow, for a magnification of 291x and with a 0.28º true field, but the view was no better. And still only an intermittent blur, but this time more elongated. The galaxy was at such an altitude it was mostly above the light dome. However, there was another problem going on: A wildfire of over over 3,000 acres was raging in Polk County, which is only about 35 miles away. I’m not sure if smoke was an issue or not, but the sky had a reddish look along the horizon. So, probably likely.

5:14 AM: I lifted my eye from the eyepiece and “Gave Up The Ghost” as related to this galaxy for the final time, not likely to return. This galaxy has acted like a ghost for me, now going on two years.

My quest began in the later summer of 2023, and ended on March 27th 2025, but never being able to see the galaxy to a level I would like. Sometimes it’s important to know when good is enough, and time to quit. I made no new sketches or written notes…

This recording and post update @ 4:28 PM (EDT) on March 27th 2025. It was my plans or hope to attempt this galaxy again in the spring of 2025, however, I have not been able to do so. I’d say, most likely….I’ve made my last observation of NGC 6118 known as “The Blinking Galaxy.”

Roger Ivester

Previous observations as following:

I attempted two very early morning observing sessions in March and April of 2024 from my suburban backyard, but again without success. A dark site is really needed to observe any low-surface-brightness galaxy, especially one as dim and faint as NGC 6118.

However, traveling to a dark-site has been over for me now, for many years. The disassembly of a heavy equatorial mount and handling a large solid-tube Newtonian, loading, driving, unloading, reassembly, and then having to do it all again, became just too much. I will just continue to do my best from the backyard.

Light pollution will only get worse, so maybe the following inexpensive “light-block” system might work for you also.

I use a medium-duty, lighter weight equatorial mount when observing from my backyard which requires star-hopping….not my GoTo mount from my back deck.

Darker skies from my back deck…

Fortunate for me, I was able to get a problem streetlight in front of my house, changed from a 4,000K LED unshielded light to a 3,000K light with a shield, and with optimum orientation away from my house.

A 5,000K multiple-bulb “residential carport light” is now my greatest problem when observing more southerly deep-sky objects. I have to move from my back-deck to my backyard for all deep-sky objects that are less than “about” +15º north declination.

Good news! The above light has been adjusted as following: February 21st 2025

My plans are now to re-observe NGC 6118 at about 1:00 AM, early May 2025, in an attempt to duplicate my 2024 observation. Will the “Blinking Galaxy” be easier with the now “redirected” 5,000K carport light?

The house is now vacant, waiting for a new owner, and still shines from sunset to sunrise, but now, not toward my house.

Date: May 11th 2024 (early AM observation and seeing NGC 6118) despite looking over the town of Boiling Springs, and the terrible “carport” light

Saturday morning: May 11th 2024 @ 1:00 AM, with a 5.0 NELM overhead, but far less in the location of NGC 6118, due to overlooking the town of Boiling Springs, and the problem “carport light” pictured above.

The following cellphone photo is from that night (May 11th) and beside my telescope. Note the constellation Scorpius toward the right lower corner. Now see the brighter pair of stars, almost in the center of the photo, above or north of Scorpius.

The most northern star, is known as “Yed Prior” at mag. 2.7. The second star toward the south or closest to Scorpius is “Yed Posterior” at mag. 3.2. Now move your telescope slightly to the NE of “Yed Prior” and use your star atlas to dead center, where NGC 6118 should be.

With a bit of difficulty and after almost an hour, I was finally able to see the galaxy. One of my greatest problems had been a pesky LED streetlight in close proximity, shinning directly into my backyard. My portable “make-shift” observatory was the answer to this.

Description: A tiny and subtle brighter middle, which resembles that of a planetary nebula. And like so many planetary nebulae, when using direct vision, vanishes or winks out. The galaxy has a very faint and diffuse irregular halo, which is oriented NE-SW. After observing NGC 6118, it’s easy to understand why its named “The Blinking Galaxy.”

Webb’s Wreath: Asterism In Hercules

July 17, 2025

Posted July 17th 2025

From “Deep-Sky Wonder’s” By Sue French:

“Moving back to Omicron and dropping 2.7º south-southwest takes you to a golden 7th magnitude star. It ornaments the eastern side of Webb’s Wreath, a little-known asterism first mentioned in the 4th edition (1881) of Thomas Webb’s observing guide “Celestial Objects for Common Telescopes.”

My 105mm scope at 68x reveals 13 additional stars, magnitudes 11 and 12, outlining 11′ x 7′ oval leans northeast and is dented inwards at the bright star.”

RA: 18h 02m Dec. +26 18m

6-09-01: Telescope 105 mm Apochromatic refractor; 610 mm focal length, and a 9 mm Nagler eyepiece for a magnification of 68x.

Pencil Sketch by Sue French as following: The following sketch was made using my 105 mm refractor with the employ of a diagonal.

Images by Mario Motta:

Using my 32-inch telescope, I imaged Webb’s Wreath in RGB and Lum, subtle colors. The images as following present the Wreath with north is at the top and west to the right.

The following image identifies very faint galaxies inside and around the wreath.

Can you still spot the galaxies in the following image?

Observer’s: Keith Rivich and Larry Mitchell

Location: ~10 miles SE of Leakey, Texas

Telescope:  25-inch f/5 Newtonian

SQM-L:   21.3

Seeing:  4 of 10  (Seeing pretty much was limited to around 300x, however, could occasionally go higher.)

Transparency:   10 of 10   

Webb’s Wreath itself is a worthy target. My 20 mm Nagler eyepiece framed the wreath quite nicely looking a bit like a lop-sided potato. Larry was going to check GAIA to see if any of these stars may be related. Except for the 7th mag star the rest look suspiciously similar. 

UGC 11097: 

This galaxy was just out of the frame in the (Mario Motta’s image) but I used it as my star hop base, so I will go ahead and mention the observation. Easy to see at mag. 14.5 with a pretty high surface brightness. Its 1.2′ x .3′ nearly N-S elongation was obvious being brighter in the center and tapering off towards the ends of the arms. A couple of 15th mag stars bracket the galaxy.

PGC 61289 (MCG +4-42-22)

This is the brightest of the galaxies in the Motta image. As suspected at mag 14.6 it was quite easy to see, appearing as a very small oval glow. A mag 14 star sits just off the galaxies northern edge.

2MFGC 14178 (in the image as PGC 1768412)

As suspected this one was tough and fun. When the field first slid into view I strongly suspected I could see some elongation at the right spot. Looking at images there is a 15th mag star just 20″ east of the core of the galaxy, which is depicted as a 14th magnitude “non-star” in Megastar. These two “stars” could easily mimic the elongation I was seeing. I bumped up power to 650x and during moments of good seeing I could distinctly see the arm of the galaxy opposite the 15th mag field star. I called Larry over to take a look and he was seeing what I was seeing. As a bonus he knew nothing about the galaxy before looking. 

For the fun part of the observation we put Larry’s NVD into the scope. He had it mated to a 27mm eyepiece so the magnification was quite low. We suspected the NVD devise should work as the galaxy is infrared bright, and we were right. The 15th mag field star was dramatically reduced in brightness so the galaxy, though tiny, was just visible as a complete edge on spiral. The dark lane visible in high res images was not visible to us. 

LEDA 1772537 (in the image is listed as a PGC):

As suspected nothing. Nada. Not even a sparkle!

UN-NAMED FACE ON SPIRAL:

We couldn’t see anything of the galaxy, no surprise there, but we could see the 17.5 mag star that sits on the NE edge of the spiral. 

Observer: Roger Ivester (North Carolina)

The following pencil sketch was made using a 10-inch f/4.5 EQ Newtonian with an 11mm eyepiece, apparent field of 82º. Magnification: 104x and field-of-view of 0.79º which was a perfect framing for the asterism.

As a follow-up on the four galaxies in and about Webb’s Wreath, they were partially featured in Stephen O’Meara’s column in the May issue of Sky & Telescope (p. 12).  Keith’s and Larry Mitchell’s earlier observations of PGC 61289 and PGC 1768412 with Keith’s 25″ were discussed in the article.  O’Meara also mentioned the two fainter galaxies within the Wreath itself “most likely require even larger apertures to detect.”  One of these is PGC 1772537, an E- or S0-type, and the other is a spiral not catalogued in LEDA (PGC).

Webb's Wreath.jpg

The following is a Cloudy Nights post by expert big scope “visual” observer, Steve Gottlieb

Larry Mitchell also included Webb’s Wreath and its galaxies in the Texas Star Party’s “Advanced Observing” list, just a week ago.  When Larry came over last Thursday to observe on Jimi Lowrey’s 48″ f/4.0, he requested to look at Webb’s Wreath again to search for the two dim galaxies within the Wreath.  Also observing with Jimi and I were Stephen O’Meara, Brent Archinal (from Lowell Observatory), and Doug McCormick (from Houston).

When we observed these galaxies at the end of the observing session, the background sky was jet black in the eyepiece (excellent contrast) and the stars pinpoint at 610x. The unnamed face-on spiral (NED lists the infrared designation WISEA J180231.28+262057.6) was immediately seen as a faint, very small glow, perhaps 10″ in diameter.  Although it was fairly easy to see, the visibility may have been enhanced by a faint star at the NE edge.

PGC or LEDA 1772537 was easy to pinpoint, as it lies at the midpoint of a mag 10.8 star 40″ SW and a similar star 40″ NE (two of the main stars in the Wreath).  At 610x it was very faint and quite small, perhaps 5″ diameter, but definitely non-stellar. I may have just been seeing the core region of this galaxy.  Checking later, I noticed that HyperLeda lists a B magnitude of 17.93 ± 0.50 and NED list a single redshift at z = 0.192.

So, there’s two things interesting about LEDA 1772537.  It lies precisely along the Wreath, and if the redshift is accurate, the light of this E or S0-type galaxy has been traveling for 2.4 billion years! (using H0 = 70).  

Steve Gottlieb