Also known as Caldwell 14 or open clusters NGC 869 and NGC 884, ( often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7,500 light years.
There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s). Their hottest main sequence stars are of spectral type B0.
I remember the first time, I saw both clusters in the eyepiece of my old Newton 1000/200 [mm]. My eye stuck to the lens. I couldn’t take my eyes off it.
Unfortunately, I did not capture both clusters as I would like, the coma corrector was not well matched as seen on the edge of the frame. It will be better next time. I promise 😉
Photos taken on August 2019 at Bieszczady with PTMA rally.
Equipment: Canon EOS 6D, SkyWatcher Newton 1000/200 [mm], F5, coma corrector, NEQ6Pro.,
- Composition: Astro Pixel Processor,
- Processing: GIMP v2.10.14 + plug-ins (Linux),
- Lights: 24 x 96[s] ISO 1250,
- Flats, Darks, Bias.