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Messages - jeffweiss9

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TAC Imaging / Re: M31 Andromeda
« on: October 18, 2017, 06:25:04 PM »
I just flipped the orientation from North-Up to North-Down for more aesthetic framing (1 year later).  I know there is no up or down in space but....the question arose:  Which edge of M31 is nearest to us, as a determination of the "correct" orientation?   After querying on CN, this North-Down orientation has M31's nearest edge at the bottom and in the apparent foreground (based on obscuration of the dust lanes in the far edge).  In this orientation, the rotation is CCW  (from another CN response).   I thought TACO's might be interested in that information (after some discussion on CN).

TAC Imaging / Re: IC5146 (Cocoon Nebula) and B168
« on: September 21, 2017, 09:27:20 AM »
Thanks, Stephen-
I was surprised by the extent of the reflection component in this one.

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 / Re: Advice needed for Pinnacles East
« on: June 30, 2017, 10:19:22 PM »
We were actually not at the Bear Gulch Trail Parking Area at the very end of the road (I misspoke).  We were at the Bear Gulch Day Use Area at Bear Gulch itself which is about 0.5 miles before the end of the road.  The Bear Gulch trail actually parallels the road, ending at the end of the road. The trail head across from the Bear Gulch Day Use Area is the Condor Gulch Trail.   The horizons were better there.   The sky was extremely dark that night and very few cars came through.

TAC Visual / Re: Advice needed for Pinnacles East
« on: June 26, 2017, 07:39:05 PM »
To follow up, the forecasts were very off for Saturday night.  The sky was clear and very dark with little or no wind at Bears Gulch parking area up the road from the East Entrance about 5 miles.  No campers but a couple of cars with headlights came through; not too much harm (for me anyway).  There were 3 of us astrophotographers plus a fourth who wondered in for a Milky Way landscape.  Great site!

TAC Visual / Re: Advice needed for Pinnacles East
« on: June 22, 2017, 01:09:39 PM »
Sounds good.  I've got my power arranged now but, unfortunately National Weather Service is now saying 17mph winds (23mph gusts) through 10pm both Friday and Saturday nights.   That hopefully will get better for me (I can image up to 10mph). It is predicted to be <~10mph after 11pm so still possible.

TAC Visual / Re: Advice needed for Pinnacles East
« on: June 21, 2017, 01:15:45 PM »
Thanks, Jamie-
That location (grassy field at the SW end of the campground on the satellite) seems to be the lat/lon of the the Clear Sky Chart for East Pinnacles.  I could drive up to Bear Gulch but that spot in SW end of the campground looks pretty good.  Now to find enough juice to keep the camera going.
Clear skies,

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 / Re: M101 Pinwheel Galaxy
« on: June 14, 2017, 07:05:35 AM »
Thanks, John.
The LZOS objective on the 130mm isn't too bad.
Clear skies,

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 / Re: California Nebula NGC1499 in Perseus
« on: May 18, 2017, 08:40:35 PM »
Looks real good, Rob, and nice write-up.  NB is really best for these emission nebula.  I'm just an LRGB person. I use Ha for these guys but they're often pretty monotone.  I do have two spare slots in my filter wheel, however, so some day.

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 / 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.

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