Observation by Richard Francis: Leo Triplet for a birthday

Uploaded by

Richard Francis

Observer

Richard Francis

Observed

2024 Mar 29 - 18:47

Uploaded

2024 May 29 - 18:52

Objects

The Leo Triplet

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Constellation

Leo

Field centre

RA: 11^h20^m
Dec: +13°19'
Position angle: +0°02'

Field size

0°52' × 1°03'

Equipment

Officina Stellare U-CRC360
Paramount MEII
Moravian C5A-100M

Exposure

~34x300s each Luminance, Red, Green, Blue

Location

La Romieu, SW France

Target name

Leo Triplet

Title

Leo Triplet for a birthday

About this image

My last image of the Leo Triplet was prepared to celebrate the birth of the son of a friend of ours, who wanted to name his son after what was in the sky at the time. I suggested Leo as a name and made the image as a present. Three years later they had a second child, a girl, born on the same day of the year ! They couldn't both be called Leo, but I've made a second image anyway. I think it's better than the last one.

I used a different camera, which I'm still getting used to. What I have discovered is that the background signal level is very uniform and a bit high, and it varies by 1 or 2 ADU. But if the signal level is close to this it's hard to avoid a noise effect in the calibrated images.

Lesson: increase exposure times beyond my usual 300s to increase the signal level.

Files associated with this observation

Leo_Triplet_LRGB_90degCCW_Rev2_reduced.jpg (2.6 MB)

Like this image

Alan Thomas, Dr Paul Leyland, Simon Paul Davis

Comments

Dr Paul Leyland, 2024 May 30 - 12:56 UTC

Berenice?

Richard Francis, 2024 May 30 - 23:09 UTC

Excellent suggestion, but they didn't ask me this time ! They chose Charley. I like your idea better ;-)

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