[Mike Harlow]

Can you do photometry of the same field with and then without the comet and subtract to remove the background signal?
Sounds simple but then I’ve never done photometry so I’m probably missing something…?
Mike.

• This reply was modified 1 week, 1 day ago by Mike Harlow.

[Mike Harlow]

Richard,
Worth giving the Astronomer’s Telegram reference for the image above for additional information: Astronomer’s Telegram #17264

Interesting trajectory for this object, almost in the plane of the ecliptic. Odd for an interstellar object given the solar system is tilted about 60 degrees from the galactic equator. How does it compare to the other two known interstellar objects?

Mike

• This reply was modified 3 weeks, 1 day ago by Mike Harlow.

[Mike Harlow]

Four images from four different observers in four days. But nothing between 22nd February and 26th April. More planning required to ensure good coverage of this nebula. Saying the BAA has a ‘variable nebula programme’ is an exaggeration…
Mike.

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