Leo Trio - Pi(e) or hamburger? (Tom Gray)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: HD98388 · Leo Triplet · M 65 · M 66 · NGC 3623 · NGC 3627 · NGC 3628

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Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

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Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

Here I have combined data from 19 Jan with that collected during a rare clear spell last night.

The famous Leo trio deserves more data to bring out the fine detail in each of these interacting galaxies. Combining data has given me 4.75 hours, but seeing limited resolution.

Revision C is the data gathered last night, a combination of 180s and 300s exposures. I was disappointed with the overall colour and detail, so decided to crop the image to focus on the trio (Rev A).

Data were captured in Stellarmate OS using my RPi4, calibrated in Nebulosity and processed using Cyril Richard’s excellent SiRIL. I’m making progress with this, but still struggling to pull out colour, especially the blue star clouds that adorn M66.

Rev B (final) was processed in SiRIL then finished in Startools, to I try and bring up the galaxies from the background and provide a bit more colour and detail.

[Post - the final version (D) is a combination of three data sets 5.5 hours, using drizzled data to bring back to full resolution, before severe cropping as a result of camera rotation between imaging sessions].

As with most things a matter of preference, personally I prefer a pie 🥧 over a burger every time.

Original
B
C
Final
D

B

Title: Processed in SiRIL, finished in Startools

Uploaded: ...

C

Title: Original image (uncropped)

Uploaded: ...

D

Title: Combination exposures (5.5 h total) at native resolution

Description: A tight crop, aligning three recent data sets comprising 78x2m + 40x3m + 11x5m UV/IR cut filter. Calibrated, drizzled and aligned in Nebulosity, background extraction, with photometric colour calibration in SiRIL and final processing in Startools.

Uploaded: ...

Altair Astro 183 M/C Hypercams
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Status	Advanced success
Started	...
Astrometry.net job	7363147
PixInsight job	QKGB9X99GZKX4R54CMPIZRMYEAP2EYVV
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h19m44s.32
RA (top/left)	11h20m26s.95
RA (top/right)	11h17m47s.60
RA (bottom/right)	11h19m01s.88
RA (bottom/left)	11h21m40s.72

Dec (center)	+13°15′06″.4
Dec (top/left)	+13°44′37″.8
Dec (top/right)	+13°28′16″.8
Dec (bottom/right)	+12°45′34″.4
Dec (bottom/left)	+13°01′52″.9

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Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

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Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

Leo Trio - Pi(e) or hamburger?

Revision title: Combination exposures (5.5 h total) at native resolution

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