CS Knowledge Base

Sh 2-37, also known by the designation IC 1284, or the common name Twiddlebug Nebula,^[5] is an emission nebula in the constellation Sagittarius. It is located is the direction of ionizing star cluster Dias 5. It also contains the radio source W 34.^[6]

It is located near the center of the galaxy, and is partially obscured by dust. Nearby Sh 2-37, which appears mostly red, are two small blue reflection nebulae, known as NGC 6589 and NGC 6590.^[7]^[8] SIMBAD notably provides the wrong coordinates for Sh 2-37, giving it the same coordinates as nearby NGC 6590.^[9]

Discovery

Sh 2-37 was discovered by Edward Emerson Barnard on a photographic plate on 31 May 1892. He initially described it as a "nebulous star".^[10]

References

[1] "IC 1283 - HII Ionized region in Sagittarius | TheSkyLive".

[2] "Around IC1283".

[3] "IC 1284 - Nebula in Sagittarius | TheSkyLive".

[4] "Around IC1283".

[5] "NGC 6589, VDB 118, GUM 78, HH 180 and IC 1283 - astrophotography by Stardoc".

[6] "Sh 2-37".

[7] "Sh2-37 - Nebula in Sagittarius".

[8] "New General Catalog Objects: NGC 6550 - 6599".

[9] "NGC 6589, NGC 6590, Ic 1283".

[10] "Galactic Nebula IC 1284 | Deep⋆Sky Corner".

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Gum Catalog
Colin Stanley Gum
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See also: Gum Nebula, RCW Catalogue