Trifid Medium Field First Light (Ron Crouch)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 20 · M 21 · NGC 6514 · NGC 6531 · Trifid Nebula

Trifid Medium Field First Light, Ron Crouch

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Trifid Medium Field First Light

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Trifid Medium Field First Light

Since bringing the QHY 294M online it had not been tried with the SW 120 Esprit OTA. 36mm Astronomik R,G,B,CLS filters. The scope also used the Falcon rotator which required guiding with a 60mm guide scope because the OAG stalk would not quite clear the rotator body in this configuration. The Riccardi reducer yielded a FL of 633mm. So lots of new things to test and sort out. In addition the choice of M-20 at ~-23 DEC was deep into the light polution of Dallas Texas whose core lies ~40 miles to the south. 60 sec subs (RGB&L) were found to be usable from about 2.5 hours East to 2 hours West of the meridian for this low declination.

Images were calibration and combined using the WBPP script in PI with automatic local normalization enabled. Each filter master had DBE applied a mild MLT noise reduction before making the RGBL. PCC worked fine. Mild masked sharpening done in Photoshop CS2.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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Amateur hosting facility
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Other
Unknown

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Status	Basic success
Started	...
Astrometry.net job	5940530
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Trifid Medium Field First Light

Trifid Medium Field First Light

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Image Index:

Contribution Index (beta):

Trifid Medium Field First Light

Trifid Medium Field First Light

Equipment

Acquisition details

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