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Topics - jeffweiss9

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TAC Imaging / IC342 The Hidden Galaxy
« on: December 03, 2017, 08:52:46 AM »
Here's an 8 hour LRGB of IC342 which is relatively obscured by lying in the plane of the Milky Way.


TAC Imaging / Wide-field 3D Astronomy
« on: November 29, 2017, 04:46:57 PM »
If you want to watch a great ~1/2 hour video (with wonderful images) on how 3D astronomy is now being done (spectra per small chip area) over a pretty wide field, click on the video (upper right) describing the new MUSE system at:

It will be a long time before amateurs are doing this in their backyards but it is very exciting.

TAC Imaging / LDN 1235 Shark Nebula
« on: November 08, 2017, 08:07:14 PM »
Here's a 5.7 hour LRGB of the Shark Nebula LDN1235, a molecular cloud with interestingly-shaped dust in Cepheus that includes two reflection nebula, VdB 149 and 150.

Pretty scary.

P.S. If you want to download the sound track that goes with it, it's at

TAC Imaging / IC5146 (Cocoon Nebula) and B168
« on: September 20, 2017, 10:30:06 PM »
An 8.8 hr LRGB image of the Cocoon Nebula in Cygnus and Bernard B168 that is wrapped around it and trails off to the West (right) in the image.
The Cocoon reflection/emission nebula appears to have more reflection than emission in this image using the new Photometric Color Calibration in PixInsight 1.8.5.  Link with more info at:


TAC Imaging / NGC 6946 Fireworks Galaxy and SN 2017eaw
« on: August 11, 2017, 02:24:30 PM »
This is an 11.7 hour HaLRGB of the Fireworks Galaxy and its most recent supernova, SN 2017eaw (in the upper arm at 1 o'clock).  Taken during three different nights at the Bear Gulch Users Area at Pinnacles N.P., East. Conditions were excellent the first night with SQM readings to 21.80 (21.90 for another imager) and quite good the other two nights.  Great place.

Link at


TAC Visual / Advice needed for Pinnacles East
« on: June 20, 2017, 07:50:32 PM »
D.A.R.C. is down for 2 weeks and I'd like to try the Pinnacles East (road closure on the West) for some imaging but I need advice on best observing location there.  Is that at the campground (where Clear Sky Chart is) or up 146 somewhere like the 'peak view point (sounds more likely).  Suggestions or info appreciated.

TAC Imaging / M101 Pinwheel Galaxy
« on: June 12, 2017, 09:47:18 PM »
Here's a 12.3 hr HaLRGB of M101 just finished:
Imaged at D.A.R.C. Obs.

TAC Imaging / M81/M82 with IFN
« on: April 06, 2017, 10:14:36 PM »
I wanted to see how much IFN I could pull of the M81/M82 region and there is definitely plenty that came out in this 9.8hour HaLRGB.
Full resolution and write up at:
A comparison of inverted image with S. Mandel's IFN in this region is at:
The galaxies are composited by exposure time with a higher resolution M81,M82 from 3 years ago  with another 12.2 hours for 20hours total on those two galaxies only.

TAC Imaging / California Nebula NGC1499 in Perseus
« on: December 10, 2016, 06:14:37 PM »
Here's a recent HaLRGB image of the California Nebula (5.9hrs).
Enjoying imaging at f/4.5 with a larger FOV (2.6 x 2.1 deg) to get these larger targets than I used to.

TAC Imaging / M31 Andromeda
« on: November 15, 2016, 08:29:42 AM »
Here's a shot from last month of M31 Andromeda Galaxy.  It's a 5.2hr LRGB at f/4.5 with my new ML16200 camera using my APM-Riccardi 0.75x focal reducer / field flattener.   Full resolution at:

Clear skies,

TAC Imaging / LDN 914
« on: October 04, 2016, 09:02:12 PM »
Here's a recent image of a large dark nebula in Cygnus just below the Pelican that should be easily visible.  It's 2 degrees long and I've only found 2 other images of it. But I think its pretty although rarely imaged.  Image and details at:


Details reproduced here:
This is an 2.6 x 2.1 degree image of Lynds Dark Nebula 914 (LDN 914) in Cygnus just below the Pelican. It is a 6.7hr LRGB using my new FLI ML16200 camera with, for the first time, the Riccardi 0.75x focal reducer/field flattener to get this large FOV. I could find only two other instances of it being imaged on the web: one by the ESA Hershel observatory in the far infrared where this “crack in the sky” was glowing and the other a luminosity image by Werner Mehl where it was completely opaque. This is a 6.7 hour LRGB version of this interesting object that apparently has been rarely imaged.

From the reference below, the LDN 914 dark nebula is a 2 degree ribbon of cold dust and gas that is about 50 light-years long and has about 800 times the mass of the Sun in total, plenty of raw material to make future stars. It glows in the far infrared emitted by very cold objects, such as clouds undergoing collapse. But in visible light, LDN 914 is black because, as we know, cold dust is extremely opaque, blocking the light from stars behind it.

Ref: Phil Plait, Bad Astronomy blog

Taken at D.A.R.C. Observatory, Mercey Hot Springs, CA 9/4/16, 9/24/16.

TAC Imaging / FLI ML-8300 and Field Flattener for Sale ***sold
« on: September 11, 2016, 07:21:26 AM »
Having upgraded to the FLI ML16200, I have my ML8300 for sale, if any TACO's are interested with local preference. I believe these are widely recognized as the best 8300 chip cameras out there with 50+ degree cooling and excellent performance.
I'm asking $2800 for the camera.  If you have an ~f/6 refractor, I have a Williams Optic field flattener that flattens the full FOV very well for $240. That includes a Precise Parts adapter that spaces the field flattener perfectly for the ML8300 and the FLI filterwheel/camera combination (filterwheel is not for sale).  Everything together is $3000. asking price.
Details, sample images and contact info at:

TAC Imaging / VdB 141 Ghost Nebula and region
« on: July 12, 2016, 09:30:58 PM »
Here are a narrow and wider framing with extended nebulosity of the VdB 141 region taken with my new FLI ML16200 camera and new Riccardi Model 1 1.0x field flattener.  They are the same 8.2 hr LRGB images from D.A.R.C.  Still working on some autofocus and/or other issues but hopefully getting there.

TAC Imaging / M101 Pinwheel Galaxy Test Shot
« on: June 27, 2016, 08:16:34 AM »
Here's a short 2.5hr test shot of M101 with a new FLI ML16200 camera from June.

Ready with an improved field flattener and other tweaks for the coming cycle but I won't be making it to GSSP.

TAC Imaging / NGC2903 barred spiral
« on: May 08, 2016, 09:25:36 PM »
With only 2 nights of imaging in all of 2016 thus far due to poor conditions, I managed this 10.3 hr LRGB of NGC2903 from 1 night in February and a short moon night in March:
Jetstream turbulence gave very poor seeing (>~5 arcsec) and there were other problems (poor focus, short on color data), but it was dark and good to be out there.  I'm hopeful conditions will now begin to improve.
Clear skies,

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