Observing in bright moonlight


Kent Blackwell
 

Except for a very bright moon it was a beautiful night for stargazing with a gentle breeze and 60+ degrees. I decided to set up my 5” refractor and split double stars.

List: 21/07/22 Takahashi TSA 120

 

Double Double - Epsilon1 Lyr

(Double Star in Lyra)

Observed: Jul 22, 2021 at 9:07:53 PM

Comment: The famous "Double Double" looks fantastic using the 3.4mm Vixen HR eyepiece at 265x. Each of the four stars appear as small tiny dots with black space between them.

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.4mm Vixen HR

Seeing: 9

Transparency: 8

 

Eta Lyrae

(Variable Double Star in Lyra)

Observed: Jul 22, 2021 at 9:14:24 PM

Comment: Struve 2487

28.2"

Gorgeous blue-white primary and a indigo secondary 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.4mm Vixen HR

Seeing: 9

Transparency: 8

 

V543 Lyrae

(Variable Double Star in Lyra)

Observed: Jul 22, 2021 at 9:15:54 PM

Comment: Struve 2431

19.0"

Bright 6.8 magnitude blue primary and a pale red 10th magnitude secondary 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.4mm Vixen HR

Seeing: 9

Transparency: 8

 

17 Lyrae

(Double Star in Lyra)

Observed: Jul 22, 2021 at 9:27:09 PM

Comment: Struve 2461

3.1"

Challenging double star because of the magnitude contrast. The primary is 5.3 magnitude and the secondary is 9.1. It split best with the 3.5mm Pentax at 230x 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.5mm Pentax

Seeing: 9

Transparency: 8

 

Sheliak - Beta Lyr

(Variable Double Star in Lyra)

Observed: Jul 22, 2021 at 9:30:52 PM

Comment: A real showpiece double star because of the color contrast. The primary is white and the secondary is blue 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.5mm Pentax

Seeing: 9

Transparency: 8

 

HD 178849

(Double Star in Lyra)

Observed: Jul 22, 2021 at 9:34:52 PM

Comment: Two pretty pairs of fairly close stars. Sort of like a spread out Epsilon Lyrae

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.5mm Pentax

Seeing: 9

Transparency: 8

 

HR 7272

(Double Star in Lyra)

Observed: Jul 22, 2021 at 9:36:36 PM

Comment: Two pretty pairs of fairly close stars. Much like a spread out Epsilon Lyrae

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HD 180286

(Double Star in Lyra)

Observed: Jul 22, 2021 at 9:37:28 PM

Comment: Yellow 7th magnitude primary and a 10.26 magnitude secondary 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HR 7535

(Variable Double Star in Cygnus)

Observed: Jul 22, 2021 at 9:39:33 PM

Comment: Strangely enough, this beautiful double star has no Struve or Otto Struve number. Like an Alberio-type pair. The primary is gold and the secondary is blue 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HR 7607

(Double Star in Cygnus)

Observed: Jul 22, 2021 at 9:43:31 PM

Comment: Otto Struve 390

 

Magnitude contrasting pair of stars. The primary is 8.6 and the secondary is 9.7 magnitude 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

Albireo - Beta1 Cyg

(Variable Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:05:33 PM

Comment: Without a doubt Alberio is the finest double star in the sky, at least in color contrast 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HR 7305

(Double Star in Lyra)

Observed: Jul 22, 2021 at 10:10:54 PM

Comment: 0.9"

Very tight pair but I split it using the 2.4mm Vixen HR at 375x 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HR 7642

(Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:26:44 PM

Comment: Struve 2609

1.9"

Wonderful tight pair of stars. The primary is yellow and the secondary is grey. Best with the 3.5mm Pentax at 230x 

Location: Virginia Beach 98% Moon 72° H 60%

Equipment: 120mm F/7.5 Takahashi, 3.5mm Pentax

Seeing: 9

Transparency: 8

 

19 Cygni

(Variable Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:28:39 PM

Comment: Orange 5.4 magnitude primary and a 10.1 magnitude secondary, widely separated. The primary is 1336 times more luminous than our sun 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 3.5mm Pentax

Seeing: 9

Transparency: 8

 

Lambda Cygni

(Variable Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:36:22 PM

Comment: 0.9"

Mark Ost and I were both looking at this at the same time, yet we didn't know it. A very challenging pair. Both of us used the 2.4mm Vixen HR at 375x. It was easier in his scope, probably because he was using an equatorial mount and I an alt-az mount 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 2.4mm Vixen HR

Seeing: 9

Transparency: 8

 

49 Cygni

(Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:41:16 PM

Comment: Struve 2716

2.8"

Tight little pair, the primary is yellow and the secondary is green 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

48 Cygni

(Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:44:02 PM

Comment: No Struve number

176"

Wide pair of stars, both nearly equal in magnitude and color 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

52 Cygni

(Double Star in Cygnus)

Observed: Jul 22, 2021 at 10:45:51 PM

Comment: Struve 2726

 

Famous star, not so much because it's a double star but every deep sky obsever knows it because it's embedded in the Eastern Veil Nebula. Aa a double star it's quite beautiful because of the nearly 5 magnitudes of contrast.

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

Saturn

(Planet in Capricornus)

Observed: Jul 22, 2021 at 11:05:02 PM

Comment: Saturn looked amazing, despite being low in the sky. What's really interesting ia NGC 7009, The Saturn Nebula is a mere 7 degrees to the north of the planet Saturn.

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HD 190849

(Double Star in Aquila)

Observed: Jul 22, 2021 at 11:14:33 PM

Comment: Pretty pair of equal blue stars 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

HD 189783

(Double Star in Aquila)

Observed: Jul 22, 2021 at 11:15:30 PM

Comment: Struve 2613

4.1"

Close pair of equal blue stars 

Location: Virginia Beach 98% Moon 67° H 71%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

Pi Aquilae

(Variable Double Star in Aquila)

Observed: Jul 22, 2021 at 11:17:38 PM

Comment: Struve 2583

1.4"

Tight pair of equally bright yellow stars 

Location: Virginia Beach 98% Moon 66° H 75%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

2 Sagittae

(Double Star in Sagitta)

Observed: Jul 22, 2021 at 11:19:44 PM

Comment: 340"

A very wide pair of 6.5 magnitude blue stars 

Location: Virginia Beach 98% Moon 66° H 75%

Equipment: 120mm F/7.5 Takahashi, 7mm Pentax

Seeing: 9

Transparency: 8

 

Coathanger - Cr 399

(Open Cluster in Vulpecula)

Observed: Jul 22, 2021 at 11:21:15 PM

Comment: It's always a pleasure to look at The Coathanger, but it's best in wide field binoculars 

Location: Virginia Beach 98% Moon 66° H 81%

Equipment: 120mm F/7.5 Takahashi, 20mm Pentax

Seeing: 9

Transparency: 8