| Classification: |
Emission Nebula NGC6820 / Sh2-89 |
| Constellation: |
Vulpecula (Vul) |
| Object Location: |
Ra 05h 41m 45s Dec -02° 26’15° (current) |
| Size & Distance: |
40.0 x 40.0 Apx 6000 light years |
|
| Date & Location: |
08-10-2007 Palomar Mountain, CA. |
| Exposure: |
Hubble Palette SHO, Sll=R, Ha=G, Olll=B, Ha= 4 @ 15min (bin 1x1) Sll, Olll= 3 ea. @ 15min. (bin 2x2) |
| Optics: |
Takahashi Epsilon-180 f2.8 504mm. w/ FLI-DF2 focuser. |
| Mount: |
Astro-Physics 900 GTO / ATS 10x36 pier. |
| Camera: |
Starlight-Xpress SXV-H9 w/ SXV guider head and 2045. |
| Filters: |
Astrodon 6nm Ha, Sll, Olll. |
| Software: |
MaxImDL 4.56, Photoshop CS. |
|
| Notes: |
Sky conditions: Average seeing, Light wind, Temp 68°
Image Field of view is 45 x 60 arcmin.
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NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in Vulpecula. The most striking feature is the trunk-like pillar of dust and gas protruding from the east side of the nebula towards the open cluster, NGC 6823 in the west. The center of the open cluster is about two million years old and is predominantly represented by many young, bright blue stars. Outer parts of the cluster intimately involving pillars of emission nebula NGC 6820, contain even younger stars. The huge pillars of gas and dust are probably formed when surrounding gas and dust is pushed and eroded away by radiation from nearby stars. Remarkable dark globules of gas and dust are also visible in the nebula.
Open cluster NGC 6823 is about 50 light years across and lies about 6000 light years away.
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