| Coordinates/Direction : | RA: 16h41m, DEC: +36o27' |
| Object size : | 20' (whole image 60' x 60') |
| Object magnitude : | 5.8 |
| Object : | Messier 13 |
| Date : | 1985 to 2000 |
| Lens/telescope : | Samuel Oschin Telescope |
| Film/CCD : | POSS-II, credits: STScI |
| Exp. time : | IR 110 minutes, Red 115 minutes, Blue 55 minutes |
| Image process tool : | AstroImageJ, Fitswork, Irfanview |
| Processing : | Green channel from average of red and blue |
| Site : | Mount Palomar, USA |
| Comment : |
Compare what you get from your own telescope, the core of cluster oversaturated. |
| More to know : |
Wikipedia:
https://en.wikipedia.org/ wiki/ Messier 13 |
| Zoom in details : | 1:1 pixel scale |
| Comment : |
As you can see if you compare to the earlier POSS-I data this one has much higher resolution. The scanner resolution is the same in the blue plates. |
| Image process tool : | AstroImageJ, Fitswork, Irfanview |
| Processing : | In this image the IR spectra has been used to the green output channel |
| Comment : |
One star is very green below the cluster.
Green is where we have the IR radiation in this false color image, it must have a strong IR radiation.
This star isn't in my star chart. Update: I got the advise to use the Aladin Star Atlas. It shows that this star is the TYC 2588-692-1.
The cluster is purple because we missing a real green channel.
These star has more continuous rgb spectra with very little IR in it, they are old stars and hot blue. |
| More to know : |
Star TYC 2588-692-1:
http://simbad.u-strasbg.fr/ |
English
