3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes (Niall MacNeill)

Contains: Solar system body or event

3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

Acquisition type: Lucky imaging

3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

Acquisition type: Lucky imaging

I imaged 3 planets on the same day, Thursday 4th May (Universal Time). i.e. Saturn, Mars & Venus. The seeing was really good which made it possible to resolve good detail on all three.
The Saturn and Mars images are in colour (RGB), whereas the Venus image is in UV and therefore monochrome.
It is interesting to compare their sizes, both apparent and absolute.
The top row shows the planets as they appeared in the telescope and on my camera sensor on May 4th. Their apparent diameters were: Saturn (16.4 arc secs...not including the rings), Mars (5.3 arc secs) & Venus (17.4 arc secs). Of course, the apparent diameters of the planets change due to their relative distance from the Earth, as we and they orbit the Sun.
The second row shows their relative absolute diameters: Saturn (116,500 kms), Mars (6,780 kms) & Venus (12,100 kms).
The Earth is very similar in size to Venus at 12,700 kms in diameter
The other revisions show the individual plaentary images

Final
Original
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B

Description: Annotated image of Saturn

Uploaded: ...

C

Description: Annotated image of Mars

Uploaded: ...

D

Description: Annotated image of Venus

Uploaded: ...

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3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

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3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

3 planets on May 4th 2023....a comparison of their relative apparent and absolute sizes

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