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



    
        

            Randal Healey
The Triplets in Leo
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The Triplets in Leo

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The Triplets in Leo, 



    
        

            Randal Healey
The Triplets in Leo
Powered byPixInsight

The Triplets in Leo

Technical card

Imaging telescopes or lenses: Explore Scientific 102mm Triplet APO CF

Imaging cameras: SBIG STF-8300M

Mounts: Celestron CGEM-DX

Guiding telescopes or lenses: Orion Mini 50mm Guide Scope Orion 50mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider

Software: PHD2 Guiding PHD 2.5  ·  PixInsight 1.8 Ripley  ·  PhotoShop CS6  ·  Sequence Generator Pro SGP

Filters: Astrodon HA 36mm - 5nm  ·  Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon RED 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon Olll 36mm - 3nm

Accessory: Explore Scientific 2" Field Flattener  ·  Home Observatory (Self Designed)  ·  Orion Starshoot Autoguider  ·  MoonLite Crayford 2.5" Moonlight Motor Focuser


Dates:April 8, 2019April 9, 2019April 10, 2019

Frames:
Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance: 17x600" (2h 50') -20C bin 1x1
Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance: 19x600" (3h 10') 20C bin 1x1
Astrodon LUM 36mm - Gen2 E -Series Tru-Balance: 16x180" (48') -20C bin 1x1
Astrodon RED 36mm - Gen2 E-Series Tru-Balance: 18x600" (3h) -20C bin 1x1

Integration: 9h 48'

Darks: 50

Flats: 50

Bias: 100

Avg. Moon age: 4.00 days

Avg. Moon phase: 17.54%


Basic astrometry details

Astrometry.net job: 2642603

RA center: 11h 19' 43"

DEC center: +13° 16' 37"

Pixel scale: 1.573 arcsec/pixel

Orientation: 191.047 degrees

Field radius: 0.816 degrees


Resolution: 2982x2249

Data source: Own remote observatory

Description

I thought I would give this famous group another try with my 103mm refractor.

This group is popular in the northern spring. Famous as the Leo Triplet, the three magnificent galaxies gather in one field of view. they can be introduced individually as NGC 3628, M66, and M65. All three are large spiral galaxies but they tend to look dissimilar because their galactic disks are tilted at different angles to our line of sight. NGC 3628 is seen edge-on, with obscuring dust lanes cutting across the plane of the galaxy, while the disks of M66 and M65 are both inclined enough to show off their spiral structure. Gravitational interactions between galaxies in the group have also left telltale signs, including the warped and inflated disk of NGC 3628 and the drawn out spiral arms of M66. This region spans about one degree (two full moons) on the sky. The field covers over 500 thousand light-years at the trio's estimated distance of 30 million light-years. I hope you enjoy.

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            Randal Healey
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The Triplets in Leo, 



    
        

            Randal Healey