NGC 6820 è una piccola nebulosa a riflessione vicina all’ammasso aperto NGC 6823 nella costellazione della Volpetta. La nebulosa a riflessione e il cluster sono incorporati in una grande nebulosa a emissione debole chiamata Sh 2-86. L’intera area della nebulosità viene spesso definita NGC 6820.
L’ammasso stellare aperto NGC 6823 è lungo circa 50 anni luce e si trova a circa 6000 anni luce di distanza. Il centro dell’ammasso si è formato circa due milioni di anni fa ed è dominato dalla luminosità da una schiera di giovani stelle blu brillanti. Le parti esterne del cluster contengono anche stelle più giovani. Costituisce il nucleo dell’associazione stellare Vulpecula OB1. (Descrizione crediti: Wikipedia)
Description
First light of my new mount Mesu 200 mk2 !!
Really happy when I compare with the same picture last year, under different skies and diferent mount….
NGC 6820 is a small reflection nebula near the open cluster NGC 6823 in Vulpecula. The reflection nebula and cluster are embedded in a large faint emission nebula called Sh 2-86. The whole area of nebulosity is often referred to as NGC 6820.
Open star cluster NGC 6823 is about 50 light years across and lies about 6000 light years away. The center of the cluster formed about two million years ago and is dominated in brightness by a host of bright young blue stars. Outer parts of the cluster contain even younger stars. It forms the core of the Vulpecula OB1 stellar association. (Description credits: Wikipedia)
Technical card
Imaging telescope or lens:Teleskop Service TS Photoline 107mm f/6.5 Super-Apo
Imaging camera:ZWO ASI1600MM-Cool
Mount:Mesu 200 Mk2
Guiding telescope or lens:Celestron OAG Deluxe
Guiding camera:ZWO ASI174 Mini
Focal reducer:Riccardi Reducer/Flattener 0.75x
Software:Main Sequence Software Seqence Generator Pro, Pleiades Astrophoto PixInsight
Filters:Astrodon HA 36mm – 5nm, Astrodon S-II 36mm – 5nm, Astrodon O-III 36mm – 5nm
Accessories:ZWO EFW, MoonLite NiteCrawler WR30
Resolution: 3798×3154
Dates:July 28, 2019, July 29, 2019
Frames:
Astrodon HA 36mm – 5nm: 147×300″ (gain: 200.00) -20C bin 1×1
Astrodon O-III 36mm – 5nm: 30×300″ (gain: 200.00) -20C bin 1×1
Astrodon S-II 36mm – 5nm: 30×300″ (gain: 200.00) -20C bin 1×1
Integration: 17.2 hours
Avg. Moon age: 26.05 days
Avg. Moon phase: 13.32%
Astrometry.net job: 2851183
RA center: 295.762 degrees
DEC center: 23.293 degrees
Pixel scale: 1.465 arcsec/pixel
Orientation: 90.757 degrees
Field radius: 1.004 degrees
Locations: AAS Montsec, Àger, Lleida, Spain
Data source: Own remote observatory
Remote source: Non-commercial independent facility