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Messages - jeffweiss9

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TAC Imaging / Re: Leo Triple with Tidal Tail and Dwarf Galaxy
« on: February 10, 2017, 11:34:18 PM »
...Actually this image was published in the March 2016 Sky and Telescope magazine.
See the article entitled "The Spiral Arms of Spring".   But they actually clipped out the most interesting part (to me anyway) which is the long tidal tail which contains the 2014 discovered Leo Tidal Dwarf Galaxy (TDG) located near the tip of the tail.

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 / Re: M31 Andromeda
« on: November 16, 2016, 04:29:33 AM »
Thanks, John-
I put up a bigger version (actually just downloaded from the web since I'm on travel).  The link works if you click on the file name.

TAC Imaging / Re: M31 Andromeda
« on: November 15, 2016, 06:27:22 PM »
Hi, Mark-
Thanks very much.  The attachments here are limited to 200kB which is a pretty harsh rendering but I added that as an attachment. I also added a link to flickr that might behave better for you.

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 / Re: Big meteor at Calstar on the last night
« on: October 08, 2016, 10:37:25 PM »

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 / Re: VdB 141 Ghost Nebula and region
« on: July 13, 2016, 07:56:46 AM »
Hi, John-
Thanks. Will do in the future.

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,

TAC Imaging / Re: Aluminum on Aluminum Threads Freeze
« on: April 28, 2016, 08:58:55 PM »
I was trying to build up the suspense :>)

TAC Imaging / Re: Aluminum on Aluminum Threads Freeze
« on: April 28, 2016, 01:12:13 PM »
End of story:  The cool down didn't work (but the fridge was only 49 deg).  The shop cut the notches in the adapter flange and they were freed.

TAC Imaging / Re: Aluminum on Aluminum Threads Freeze
« on: April 26, 2016, 07:42:00 PM »
Yes, that's what Markus (APM Telescopes) told me when I told him what I planned to do.  "Just the cool down works many times."
It's in  the fridge now.

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