IC5152 is an irregular galaxy located in the constellation of Indus near the border of Grus. It was long thought that it was a possible out lying member of our local group of galaxies but due to its southern location and to the foreground star SAO 247284, inhibited accurate measurements with ground based telescopes. Only recently it has been confirmed by using snap shot data through the HST that it is beyond our local group. Its nearest neighbour being NGC55 in the Sculptor group making IC5152 @ around 800 KPC a very isolated object indeed. At these distances, it would be the smallest irregular galaxy know with a magnitude of MB = -10.7 and -12.7 respectively. Study has also determined that there has been extensive star formation within the galaxy in the last 100,000,000 years and still continuing, evident by the multitude of giant blue stars shown in this image. Also of note are the extensive HII regions and UV bright stars.
|Date||Lum- 01/ 08/ 11 & RGB 20 / 08/ 11|
|Location||BayTop Observatory- Streaky Bay South Australia|
|Instrument||Home built 10" Newtonian (Bob Royce primary) and an Antares 1/20th wave secondary with Televue Paracorr coma corrector. System working @ f4.6 (native F4/ 1016 FL) 1.315 arcsec/pixel- FOV aprox 44.6x44.6|
|Mount||Celestron CI700 controlled by the SiTech servo Goto Control System with Pittman 8000 series motors. Pulley and belt system|
|Camera (CCD)||Starlight Xpress SXVR-H16 monochrome with Starlight Xpress USB filter wheel.|
|Exposures||L: 128' R: 40' G: 40 B: 40' (4min sub exposures all unbinned) Flat field, dark and bias frames subtracted.|
|Guiding||ST80 refractor F5 & SX OAG with a Starlight Xpress Exview guide head.|
|Filters||Astronomik typeII anti halo L (clear) RGB 2" filter set|
Conditions- Average to poor seeing and transparency when taking the lum due to excessive dew and light cloud. The evening when taking the colour set was very good with heavy dew.