The Rosette Nebula is a vast cloud of dust and gas. In the
heart of the Rosette Nebula lies a bright open cluster (NGC 2244) of stars
that lights up the nebula. These stars formed about four million years ago
from the nebular material and their stellar winds are clearing a hole in the
nebula's center, insulated by a layer of dust and hot gas. High energy light
from the bright young stars of NGC 2244 ionizes the surrounding hydrogen gas
clouds to create the red emission nebula appearance.A true diameter of the
nebula is about 130 light years and distance 5 500 ly. The nebula is a splendid
object, especially for astrophotography.
Rosette on March 07. 2011. Camera SBIG ST8300C, 6x240s , Megrez 80/480 triplet fluorite Apo, 0,8x TeleVue field flatenner, Lumicon DeepSky filter, Celestron CGEM mount, guided through a Celestron EdgeHD 9,25 on QHY5 CCD.
Megrez
80 APO, TeleVue 0,8x field flattener, Lumicon Deep Sky filter, Canon EOS 300D
(800ASA, 6x300 second of total exposure; April 04. 2005).
Older image (2002) photographed through Celestron refractor
102mm f/5, Pentax SP 1000 SLR , 30 minutes exposure on Fujicolor superia 800.
Autoguided with Pixcel 237 CCD.
Image of central region. Obtained
through a Telephoto lens 200mm/ f3,5 (area of 1,3x1,3 degree) on Pixcel 237
CCD. Exposure was 300 second at CCD temperature -30 degree Celsius.
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