Now is the perfect time “to attempt” Sirius B: It might be easier than you think. (?)

Why an off-axis stop-down mask?

“Often the effects of poor sky stability can be countered to a certain degree. Larger aperture scopes are adversely affected by atmospheric turbulence more than smaller scopes. The cylinder of light of parallel light rays collected by an 8-inch object is subject to a larger cross section of the atmosphere than is that of a 3-inch. The greater the amplitude of of variation in air parcel boundary layers perceived by the system, the more this refractive aberration manifests itself as image wavering. “For certain deep-sky objects (notably double stars) one needs to trade light gathering ability for turbulence reduction. The aperture of the telescope can be reduced by employing a mask over the light gathering end…..” by TL

Tom Lorenzin “1000+ The Amateur Astronomer’s Field Guide to Deep-Sky Observing”

I’ve never tried or attempted to see Sirius B with a Newtonian. I was anxious to give it a try with my 10-inch f/4.5 using an off-axis stop-down mask with an effective aperture of 5.25-inches.

November 2nd 2023:

Beginning at 5:30 AM with a 3rd quarter moon and really bright. I concluded my session at 7:20; approximately 30 minutes before sunrise. I was still able to see Sirius B!

Surprisingly, I could still see the companion just as well at 7:20 AM in very “dim daylight” and still with a fairly bright moon, as when I began almost two hours earlier. This would show and prove that double stars can be enjoyed with a moon and light pollution.

I used a small plastic protractor to help me determine the position angle of Sirius B, and where to look.

My first time seeing Sirius B occurred in 2016, using a 102 mm f/8 FS fluorite Takahashi refractor in March 2016, from Lost Arrow Ranch. My good friend and astronomy associate Don Brooks of many years owns this telescope.

It was actually very easy with this telescope using direct vision. A group of six amateurs took the test.

Using the face of a clock, and all without sharing their perceived position of the companion until everyone had the opportunity to observe.  When the last person completed their observation, all correctly identified the position of Sirius B.  

Some were very skilled observers, but a couple or more were not, however, all could easily locate and see the companion. 

Roger, thanks so much for the off-axis mask idea….wonderful.

Sirius B:

After several or should say “many” attempts I spotted Sirius B in May 2020, using averted vision. My eyes were tearing, cloth over my head and let Sirius pass through the eyepiece. However, after 45 minutes of struggle, I saw the companion.

To-Date: I have now found and seen the companion, also known as Sirius B several times, but it’s still never an easy. It is important to have a stable and clear sky, and good seeing is “absolutely critical” if you are considering taking on this task.

Interesting; I found if Sirius is in the west and after sunrise, seeing Sirius B is actually easier, which might be surprising to many. Roger Ivester, mentioned the same in his report. Magda

1971 class reunion: October 11th 2025: And a great time was had by all! It was a breezy (windy) and really cool Saturday afternoon.

The 2023 event follows 2025….just keeping scanning down.

I missed getting a “face-on” picture of Debbie. How was that possible? So, I thought I’d just share a photo of Debbie and Sophie from May 2025.

Photos of the 2023 Burns High School class reunion are as following: Much appreciation to Charlotte Sinclaire for taking the lead in organizing this fabulous event. Everything was perfect! A memorable class reunion for sure.

In the following photo…Five guys began 1st grade at Polkville in August 1959, and graduated together at Burns. We were the first class at the new school, and went all four years.

However, after the 5th grade, some of us parted ways for three years, some went to Casar and some went to Piedmont…but back together again at the new Burns High School in the fall of 1967.

Left to right: Charles Melton, Roger Ivester, Rob Pendleton, Bill Ledford and Don Bridges.

Depending on the device you are using, it may be necessary to slide the chart to the right to see in its entirety.

Number Code

Map Color Code

Label

Sky Mag.

Naked Eye Limit Mag.

320mm Limit Mag.

M33 visible?

M31 visible?

Central Galaxy visible?

Zodiacal light visible?

Light Pollution

Clouds

Ground Objects

1

excellent dark sky

22.00–21.99

≥ 7.5

> 17

obvious

.

casts shadows

striking

airglow apparent

.

visible only as silhouettes

2

average dark sky

21.99–21.89

7.0–7.49

16.5

easy with direct vision

.

appears highly structured

bright, faint yellow color

airglow faint

dark everywhere

large near objects vague

3

rural sky

21.89–21.69

6.5–6.99

16.0

easy with averted vision

.

complex structure

obvious

LP on horizon

dark overhead

large distant objects vague

4

rural/suburban transition

21.69–20.49

6.0–6.49

15.5

difficult with averted vision

obvious

only large structures

halfway to zenith

low LP

lit in distance

distant large objects distinct

5

suburban

20.49–19.50

5.5–5.99

14.5–15.0

.

easy with direct vision

washed out

faint

encircling LP

brighter than sky

6

bright suburban

19.50–18.94

5.0–5.49

14.0–14.5

.

easy with averted vision

visible only near zenith

.

LP to 35°

fairly bright

small close objects distinct

7

suburban/urban transition

18.94–18.38

4.5–4.99

14.0

.

difficult with averted vision

invisible

.

LP to zenith

brilliantly lit

.

8

city sky

< 18.38

4.0–4.49

13

.

.

.

.

bright to 35°

.

headlines legible

9

inner city sky

.

≤ 4.0

.

.

.

.

bright at zenith

.

.

My view to the east (last night @ 9:15 PM, November 18, 2023 from my back deck) showing the light pollution at about 15º above the treetops.

I always try to observe deep-sky objects at least one hour or two from the meridian.

It is difficult to see the Pleiades “visually” at this low altitude. I was using an iPhone 14 “handheld” to make a photo for illustrative purposes.

The Pleiades was my first deep-sky object when I was 12 years old. I remember so well, walking out in my front yard in about mid-November and seeing this cluster rising above the treetops.

At that time, I had no clue as to what this group of stars were.

A year or so later I found out it was the Pleiades, M45 and my interest in amateur astronomy began, which continues to this day. Interesting to note: This was Leslie Peltier’s first deep-sky object also, as probably so many others.

The following photo:

Andromeda is difficult for me visually, and requires averted vision. At the meridian, it can be fairly easy, but averted vision still works best.

The following photo using my phone, presents the galaxy quite a bit brighter than naked-eye.

So, I estimate the Bortle Scale from my backyard to be ~6.5. I think we can all agree, the Bortle scale is not a definitive number, but using this criteria can describe an observing site pretty accurately. I’d say John Bortle developed an excellent, simple and objective measurement system for judging different observing sites, and for comparison with others.

I continue to ride, but “absolutely certain” I’ll not be able to ride another 100,000 miles. My rides in recent years are quite a bit shorter and much slower, but more fun.

Date: October 9th 2023:

I’ve went from an 80mm f/5 refractor to this 10-inch Newtonian in just a matter of days. So, I’m proud of the progress I’ve make, from never using a camera with a telescope, to “at least” an image of the moon. And all within a week!

I changed some settings on my camera, something I’d never done before. It had been set on ISO 100, for my everyday snapshots, and changed to ISO 400 this morning for this moon shot. I was amazed how much brighter the moon was when focusing through the camera using this 10-inch versus the 80mm refractor.

For sure a lot easier to focus with the brighter view due to the size of the telescope.

The field using this telescope is really narrow and small as this photo shows. Now I’ve got to figure out how to set the “exposure time” for some small and bright deep-sky objects.

I’m actually amazed that I could do this...and hopefully more and better to come. Debbie

Telescope: 80mm: 400mm Focal Length: f/5

Camera: Nikon D3300

Nikon T-Adaptor

Camera Setting: Manual

Vixen GP Equatorial Mount

The following photo was made after sunrise

Nikon T-Adaptor

I also made a photo as following using a 10-inch f/4.5 EQ telescope. Roger had using this telescope during an early morning 4:00 AM observing session of a galaxy. So, before bringing it back into the house, he suggested I try a moon photo with this telescope. This is my photo.