Dragan
July 20th, 2020, 03:55 PM
NGC6905 – The Blue Flash
Henize 2-466
PK 61-9.1
Delphinus
Planetary Nebula
RA 20h 22m 23.0s
DEC 20 06' 16"
Magnitude 10.9
CS mag: 15.7
Size: 72.0"x 37.0"
When I began reviewing objects for this week’s OOTW, I rummaged through my notes looking for an object that would qualify as ‘eye candy’. I wanted to provide a nice visual treat this week, particularly in large scopes. Needless to say, I was a little surprised to discover that my object this week had never been previously selected as an OOTW.
NGC6905, also known as the Blue Flash Planetary, sits in the northern constellation Delphinus the Dolphin near the borders of Vulpecula and Sagitta. It was discovered by Sir William Herschel in 1784 using his 18” f/13 speculum mirrored telescope. Herschel described the planetary as “perfectly round, pretty bright and pretty well defined”.
Visually, 6905 is a delight. Able to be seen in all manner of telescopes, the Blue Flash best resembles its namesake from dark skies with larger scopes. It’s blue-green hue starts to reveal itself in scopes larger than 10”. The planetary is a bright, slightly elongated glow superimposed by an isosceles triangle of ~11th magnitude stars.
My last observations of this object came in 2015.
July 3rd, 2015. In my 25” at 315x and 394x, my notes reveal a “blueish glow inside a triangle of stars, round but slightly elongated with some mottling. Brightening on its edges. CS readily direct vision. Reminds me of M27. NPB and OIII both brightened it. Great view!”.
14OCT15 30” f/4 OMI EVO Eastern and western edges (mostly eastern) quite pronounced with northern southern edges less defined. Overall appearance reminds me of M27. Mottling throughout central regions. CS direct vision. Rather light blue object but les so than 7662 I think.”
NGC 6905 is a wonderful object visible in all manner of telescope apertures. It’s a beautiful object that sits in a rich field of stars and proves to be quite the sight in larger scopes.
As always,
“Give it a go and let us know!”
3963
©Graham Winstanley
Henize 2-466
PK 61-9.1
Delphinus
Planetary Nebula
RA 20h 22m 23.0s
DEC 20 06' 16"
Magnitude 10.9
CS mag: 15.7
Size: 72.0"x 37.0"
When I began reviewing objects for this week’s OOTW, I rummaged through my notes looking for an object that would qualify as ‘eye candy’. I wanted to provide a nice visual treat this week, particularly in large scopes. Needless to say, I was a little surprised to discover that my object this week had never been previously selected as an OOTW.
NGC6905, also known as the Blue Flash Planetary, sits in the northern constellation Delphinus the Dolphin near the borders of Vulpecula and Sagitta. It was discovered by Sir William Herschel in 1784 using his 18” f/13 speculum mirrored telescope. Herschel described the planetary as “perfectly round, pretty bright and pretty well defined”.
Visually, 6905 is a delight. Able to be seen in all manner of telescopes, the Blue Flash best resembles its namesake from dark skies with larger scopes. It’s blue-green hue starts to reveal itself in scopes larger than 10”. The planetary is a bright, slightly elongated glow superimposed by an isosceles triangle of ~11th magnitude stars.
My last observations of this object came in 2015.
July 3rd, 2015. In my 25” at 315x and 394x, my notes reveal a “blueish glow inside a triangle of stars, round but slightly elongated with some mottling. Brightening on its edges. CS readily direct vision. Reminds me of M27. NPB and OIII both brightened it. Great view!”.
14OCT15 30” f/4 OMI EVO Eastern and western edges (mostly eastern) quite pronounced with northern southern edges less defined. Overall appearance reminds me of M27. Mottling throughout central regions. CS direct vision. Rather light blue object but les so than 7662 I think.”
NGC 6905 is a wonderful object visible in all manner of telescope apertures. It’s a beautiful object that sits in a rich field of stars and proves to be quite the sight in larger scopes.
As always,
“Give it a go and let us know!”
3963
©Graham Winstanley