M 20
M 20
The Trifid Nebula M20 is famous for its three-lobed appearance. The red emission nebula with its young star cluster near its center is surrounded by a blue reflection nebula which is particularly conspicuous to the northern end. The nebula's distance is rather uncertain, with values between 2,200 light years (Mallas/Kreimer; Glyn Jones has 2,300) and about 7,600 light years (C.R. O'Dell 1963).
Bill Arnett's Trifid Nebula M20 photo page, info page.
| Right ascension | 17 : 58.9 (hours : minutes) |
|---|---|
| Declination | -23 : 02 (degrees : minutes) |
| Distance | 2.2 (light-years*10^3) |
| Visual magnitude | 9.0 |
