Observation by Mazin Younis: Nova shifting to Red

Uploaded by

Mazin Younis

Observer

Mazin Younis

Observed

2021 May 19 - 01:00

Uploaded

2021 May 19 - 12:51

Objects

The Bubble Nebula (NGC7635)

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Constellation

Cassiopeia

Field centre

RA: 23^h25^m
Dec: +61°09'
Position angle: +130°04'

Field size

0°21' × 0°21'

Equipment

Skywatcher Quattro 200mm Newtonian f/4
ZWO ASI 294MC-Pro

Exposure

90 frames @ 60s each

Location

Hale Barnes, Manchester

Target name

Nova Cassiopeia

Title

Nova shifting to Red

About this image

A comparison between photos taken on 30.03.2021 and 19.05.2021 showing Nova Cas 2021 shifting in colour to red.

I guess it means the ionised Hydrogen is getting cooler and electrons jumping back to lower orbit round the nucleus, which results in emitting photons in the red spectrum (Balmer series). See brilliant spectrum photos by Mike Harlow

Files associated with this observation

Nova_Comparison.jpg (303.7 kB)

Like this image

Jeremy Shears, Mike Harlow, Andy Wilson, Nick James

Comments

Mike Harlow, 2021 May 20 - 07:39 UTC

Hi Mazin,

A very nice comparison illustrating the changing conditions in the nova. Look forward to seeing more of your images of the nova as it fades. Nice work,

Mike.

Mazin Younis, 2021 May 20 - 11:10 UTC

Thanks Mike, I will (weather permitting). Also your brilliant work made me think of learning Astro Spectrography in near future :)

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