| Date 2016/03/14 Observation place New Mexico |
Technical
| Telescope | Planewave 431mm – 17″, 1940mm FL, f/4,5 with focal reducer |
| Mount | Planewave Ascension 200HR (FLI) |
| Imaging camera | Microline PL6303E (FLI) - regulated at -35o Celsius |
| Image type | L (RGB) (Vs for synghetic green) |
| Exhibition | Luminance (9 x 10 'bin 1 × 1), R and B (8 x 3' bin 2 × 2 each) |
| Pretreatment | Maxim DL |
| Treatment | Photoshop and PixInsight |
| Specific treatment | Create a synthetic green image |
Object description
| Object type | Barred spiral galaxy |
| Constellation | Lion |
| Visual magnitude | 9,7 |
| Distance | 25 million light years |
| Diameter | 50000 light years |
| Dimension seen from Earth | 12,6 x 6 arc minutes |
| NGC2903 is a barred spiral galaxy visible in the spring sky. Its distance is about 25 million light years from Earth. It contains the diffuse nebula NGC2905 which is located in one of the arms of the galaxy. The galaxy is about half of our Milky Way's diameter. In a site with little light pollution, NGC2903 is visible through binoculars and small telescopes. We then see it as a stain. It takes a telescope with a diameter of 10 inches or more to start solving the galaxy. In my image, which solves NGC2903 very well, we can appreciate the great beauty of this galaxy which is presented in blue tones. We can also see four other galaxies presented in the following annotation (made with the PixInsight software using my image). See the blue annotations PGC… in the following link: https://ciel-astro-ccd.com/ngc2903_annot.jpg It is always impressive to see so many galaxies in a field of view of about the diameter of the full moon (30 'of arc). Each of these galaxies containing billions of stars! |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |