Sh 2-37
| Emission nebula | |
|---|---|
| H II region | |
_-_VST_-_Glowing_rosy_in_the_dark_(potw2340a).jpg?lang=en) As viewed in 2023 | |
| Observation data: epoch | |
| Right ascension | 18h 18m 48s |
| Declination | −19° 45′ 03″[1] |
| Distance | 5800[2] ly |
| Apparent magnitude (V) | 7.7[3] |
| Apparent dimensions (V) | 19.2' × 14.2' |
| Constellation | Sagittarius |
| Physical characteristics | |
| Radius | 34[4] ly |
| Designations | Gum 78, IC 1283/4, RCW 153, LBN 47 |
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
[edit]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
[edit]- ^ "IC 1283 - HII Ionized region in Sagittarius | TheSkyLive".
- ^ "Around IC1283".
- ^ "IC 1284 - Nebula in Sagittarius | TheSkyLive".
- ^ "Around IC1283".
- ^ "NGC 6589, VDB 118, GUM 78, HH 180 and IC 1283 - astrophotography by Stardoc".
- ^ "Sh 2-37".
- ^ "Sh2-37 - Nebula in Sagittarius".
- ^ "New General Catalog Objects: NGC 6550 - 6599".
- ^ "NGC 6589, NGC 6590, Ic 1283".
- ^ "Galactic Nebula IC 1284 | Deep⋆Sky Corner".
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