Hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  M 65  ·  M 66  ·  NGC 3623  ·  NGC 3627  ·  NGC 3628
Leo Triplet, 



    
        

            Chris Sullivan
Leo Triplet
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Leo Triplet

Leo Triplet, 



    
        

            Chris Sullivan
Leo Triplet
Powered byPixInsight

Leo Triplet

Technical card

Imaging telescopes or lenses: Explore Scientific PN-208/812 Carbon Fiber OTA

Imaging cameras: ZWO ASI 1600MM Cool

Mounts: SkyWatcher AZ-EQ5

Guiding telescopes or lenses: ZWO Off Axis Guider

Guiding cameras: Starlight Xpress Lodestar Autoguider X2

Filters: Optolong H-alpha 7nm 1.25"  ·  Green  ·  Blue  ·  Baader IR-Cut Moon & Skyglow Neodymium  ·  Red

Accessory: Explore Scientific HR Coma Corrector


Dates:Jan. 26, 2020Jan. 30, 2020Feb. 15, 2020Feb. 22, 2020Feb. 23, 2020Feb. 24, 2020Feb. 29, 2020March 8, 2020March 9, 2020March 18, 2020

Frames:
Baader IR-Cut Moon & Skyglow Neodymium: 166x150" (6h 55') (gain: 139.00)
Blue: 104x150" (4h 20') (gain: 139.00)
Green: 131x150" (5h 27' 30") (gain: 139.00)
Optolong H-alpha 7nm 1.25": 20x300" (1h 40') (gain: 139.00)
Red: 132x150" (5h 30') (gain: 139.00)

Integration: 23h 52' 30"

Avg. Moon age: 14.42 days

Avg. Moon phase: 34.07%

Bortle Dark-Sky Scale: 7.50


Basic astrometry details

Astrometry.net job: 3392262

RA center: 11h 19' 53"

DEC center: +13° 19' 48"

Pixel scale: 0.914 arcsec/pixel

Orientation: 274.173 degrees

Field radius: 0.741 degrees


Resolution: 4656x3520

Data source: Backyard

Description

A couple caveats:

1. I did actually use some of my data from my previous attempt in 2017 making the total hours of integration 33.9 hours. I didn't include this in the total for a couple reasons, the main one being that I mostly used those data for fixing some overly skewed stars due to the collimation woes that I mentioned in my Thor's Helmet image, but it did also end up in the superlum stack and Ha stack as well.

2. Like I said: My collimation is off. Zoom in at your own peril (pixel peepers: You've been warned). This was actually a little worse than Thor's Helmet, because I only imaged on one side of the Meridian. I took the scope completely apart on Wednesday and found two possible sources of the collimation problems I've been plagued with since January. Hopefully I fixed everything - I should know by Friday morning.

Anyway: How cool is it that I got a trace of that tidal stream from my Bortle 7+ location? I wouldn't have thought it possible, but I actually saw a trace of it in an early lum test stack. I must have really messed up my flats in 2017 to have not gotten it.

Comments

Revisions

  • Final
    Leo Triplet, 



    
        

            Chris Sullivan
    Original
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            Chris Sullivan
    B
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    C
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            Chris Sullivan
    D

B

Description: M66

Uploaded: ...

C

Description: M65

Uploaded: ...

D

Description: Hamburger

Uploaded: ...

Sky plot

Sky plot

Histogram

Leo Triplet, 



    
        

            Chris Sullivan