Sh 2-37
Emission nebula
From Wikipedia, the free encyclopedia
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]
_-_VST_-_Glowing_rosy_in_the_dark_(potw2340a).jpg)
| Emission nebula | |
|---|---|
| H II region | |
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 |
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]
