Sh2-239
HII Region in Taurus
About
A small emission nebula in Taurus, about 450 light-years away, with Herbig-Haro objects. It lies within the dark cloud LDN 1551, at the Taurus molecular cloud's southern edge, where young stars embedded in the gas drive outflows into their surroundings.
Imaging tips
- Only about 5′ across, so it needs a long focal length and a fine pixel scale.
- One team used a 560 mm refractor and a Nikon D810A for 22 six-minute subs, 2 hours 12 minutes in all.
- Best in November and December, peaking near 58° altitude from 50°N.
Facts
- Size
- 5′
- Magnitude
- —
- Coordinates
- RA 4h 31.3m, Dec +18° 6′
- Framing, APS-C
- longer than 4000 mm
- Framing, full frame
- longer than 4000 mm
- Best months
- Nov, Dec
- Peak altitude
- 58° from 50°N, 73° from 35°N