NGC 6820 and NGC 6823

NGC 6820

NGC 6820 is a faint emission nebula which is located in the constellation Vulpecula, within a rich stretch of the Milky Way. It features a prominent dark column stretching well into the nebula from the northeast. The open cluster within the nebula's center is designated as NGC 6823. Both are located about 6000 light years from Earth. NGC 6823 is quite a young star cluster at only about 2 million years old.

Vulpecula and Sagitta, zoom lens photograph.

Exposure Data

Instrument: 4.9" f/3.8 Wright-Newtonian
F/stop: 3.8
Exposure: 13 x 10 minutes + 2 minutes
Camera: Canon 350D with Baader UV-IR-Cut-Filter
Sensitivity: ISO 800
Date: August 28, 2008 / August 29, 2008
Exposure start: 2:37 MESZ / 23:24 MESZ
Location: Wallackhaus, Carinthia
Conditions: Visual limiting magnitude 6.5 mag, seeing 5.6" FWHM, temperature 6.5°C (decreasing), moderate wind (in squalls), moderate humidity / Visual limiting magnitude 6.3, seeing 4, temperature 7.5°C, strong wind (in squalls), no dew
Autoguider: Meade Pictor 216 XT, max. error: 7" (RA), 3" (Dec)
Enhancement: Basic data reduction, combine, logarithmic curves, star size reduction, dynamic range extension, background flattening, noise filtering, color correction, local contrast enhancement
Notes: Image taken during two nights of my stay at the Großglockner-Hochalpenstraße in August 2008. See an Observation Report of this event (in German).

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