Lagoon in SHO (Brian Boyle)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: 7 Sgr · 9 Sgr · B296 · B88 · B89 · HD164194 · HD164265 · HD164266 · HD164385 · HD164386 · HD164515 · HD164535 · HD164536 · HD164537 · HD164585 · HD164602 · HD164793 · HD164865 · HD164906 · HD164907 · HD164933 · HD164947 · HD165016 · HD165052 · HD165133 · HD165246 · HD165289 · HD165321 · HD165345 · HD165447 · And 67 more.

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Lagoon in SHO

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Lagoon in SHO

Another cloudy night, but I could at least see the moon and some stars. Given the conditions, I decided to have a go at the Lagoon nebula. It had the triple advantage of a) above 45deg altitude for 7 hours and b) crazy bright in NB c) being far enough away from a 60%+ moon (and I could do [OIII] after the moon set).

Stars counts varyied by up to a factor of two between frames most of the night and the auto guider frequently gave up. But I persevered - actually I went to bed - what you don't know can't hurt you - and got up early to reduce the data and listen to England v Scotland in the Euros.

Data reduction was harder then I imagined. The stars on top of the bright nebula played havoc with the deconvolution and HDRMultiscale Transform routines. The former giving Panda and the latter giving red-rimmed eyes around stars. No amount of masking seemed to work [although I suspect it is more my incompetence than the data]. The loss of HDRMT is no biggie, but I rely on deconvolution to make correct for some of my generally rubbish seeing.

In the end, however, I think I managed to fish out an OK result from this blue lagoon. Yes the colours are bit bright, but this is NB and the colours are all ficticious anyway.

25 x 300s Ha

24 x 300s [OIII]

22 x 300s [SII]

Original
B
C
Final
D

B

Title: What a difference a year makes

Description: Re-reduced and post-processed from scratch. I have learned a lot in the last year.

Uploaded: ...

C

Description: New post-processing using BlueXterminator.

Uploaded: ...

New Zealand Astrophotography
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Status	Advanced success
Started	...
Astrometry.net job	6768163
PixInsight job	J6QBSZ13XYWS0ZGHRKF8THAPPWV6GUZO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h04m17s.53
RA (top/left)	18h01m10s.42
RA (top/right)	18h00m43s.43
RA (bottom/right)	18h07m26s.73
RA (bottom/left)	18h07m50s.28

Dec (center)	-24°17′51″.6
Dec (top/left)	-23°42′58″.7
Dec (top/right)	-24°43′55″.1
Dec (bottom/right)	-24°52′35″.3
Dec (bottom/left)	-23°51′32″.1

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Lagoon in SHO

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