Ngc 6826 - Blinking Planetary Nebula

 

W. HERSCHEL: [Observed 6 September 1793] A bright point, a little extended, like two points close to one another; as bright as a star of the 8.9 magnitude, surrounded by a very bright milky nebulosity suddenly terminated, having the appearance of a planetary nebula with a lucid center; the border however is not very well defined. It is perfectly round, and I suppose about half a minute in diameter. It is of a middle species, between the planetary nebulae and nebulous stars, and is a beautiful phenomenon. (Η IV-73)

~ The Caldwell Objects, Stephen James O''Meara

Technical details:

Optics: Vixen VC200L @ f/6.4

Mount: Skywatcher HEQ5 Synscan Pro (belt mod)

Guiding: ST-237 guide chip of SBIG ST2000XM

Camera: SBIG ST2000XM

Filter Wheel: SBIG CFW9

Filters: L

CCD Temperature: 0 degrees Celsius

Constellation: Cygnus

Date: Jul 18, 2021

Location: Korinthos - Greece - Albireo Observatory 1

Exposure:

L=12x300 sec bin 1x1

Calibration: Darks, Flats, Bias

Software:

Capturing/Calibration/Stacking: MaximDL

Processing: Pixinsight 

NGC 6946 (LRGB)

 

NGC 6946 is a spiral galaxy with a pair of branching arms that have a puzzling propensity for supernova explosions. In the 20th century terrestrial astronomers witnessed nine supernovae blazing forth in that galaxy (SN 1917A, SN 1939C, SN 1948B, SN 1968D, SN 1969P, SN 1980K, SN 2002hh, SN 2004et, and SN 2008S). The longest duration between these events was 60 years, suggesting that, as of this writing, another seems about due.

Technical details:

Optics: Vixen VC200L @ f/6.4
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: L
CCD Temperature: 0 degrees Celsius
Constellation: Cepheus
Date: Jul 17-18, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 sec bin 1x1

R=12x600 sec bin 1x1

G=12x600 sec bin 1x1

B=12x600 sec bin 1x1
Calibration: Darks, Flats, Bias 

Venus & Mars Conjunction & The Crescent Moon July 2021

Big, macho Venus, Goddess of Love, and wimpy little Mars, God of War, are at their closest together, about ½° apart, low in the west-northwest in twilight. This evening the crescent Moon shines upper left of them, as shown above.

Optics: Canon EF 200mm f/2.8L USM lens

Mount: Digipod A 2541P Tripod, Manfrotto 496 RC2 Ball Head

Camera: Canon EOS 450d

Date: July 12, 2021

Location: Kifisia - Greece

Exposure: 1 sec, ISO 800

NGC 6946

NGC 6946 is a spiral galaxy with a pair of branching arms that have a puzzling propensity for supernova explosions. In the 20th century terrestrial astronomers witnessed nine supernovae blazing forth in that galaxy (SN 1917A, SN 1939C, SN 1948B, SN 1968D, SN 1969P, SN 1980K, SN 2002hh, SN 2004et, and SN 2008S). The longest duration between these events was 60 years, suggesting that, as of this writing, another seems about due.

Technical details:

Optics: Vixen VC200L @ f/6.4
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: L
CCD Temperature: 0 degrees Celsius
Constellation: Cepheus
Date: Jul 3, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 sec bin 1x1
Calibration: Darks, Flats, Bias