SH2-157 (Lobster Claw Nebula) not found?

General Questions
1

Hello,

Hope this is not a silly question but somehow when I search “SH2-157” (Lobster Claw Nebula) within the Telescope Simulator, it only shows “Can’t find what you are looking for?”. Other Sharpless objects (e.g. SH2-155) are fine. Just SH2-157 that I have a trouble with.
I can locate it by manually moving the sky. When I show the annotations, I don’t see “SH2-157”. I see “LBN 536” and “LBL 540” on or around the Lobster Claw Nebula.
When I search it with Stellarium (desktop version), SH2-157 is associated with LBN 537, not 536 or 540.
So, I’m confused. Is the Lobster Claw Nebula not officially given SH2-157? Or is it a bug of Telescope Simulator?

Thanks,

2

Some objects are present only in the extended database, which you can enable in your Preferences page.

This was the case for SH 2-157, but now I’ve added the complete SH catalog to the essential database (the default) so you should now be able to find it without installing the extended version.

Bear in mind SH 2-157 is also SH 1-109 according to SIMBAD, so both IDs appear under the same page: https://telescopius.com/deep-sky-objects/sh-1-109/lobster-claw-nebula/h2-region/radio-source

3

Thank you very much for a quick action. I can now search it!

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