Left Navigation

The 3towers Observatory: Arp Galaxies


ngc5128.jpg (16839 bytes)
Arp153 (NGC5128) Black & White* Arp153 (NGC5128) Color**

* Black & White Images of Omega Centauri (NGC5139) and NGC5128 were obtained between 5:30 and 6:00am on 17 January 1999 as each object culminated low on the southern horizon. The image of NGC5128 consists of nine 90-second exposures added together. The image of Omega Centauri consists of five 15-second exposures added together. The LX-200 telescope computer controls would not move the telescope to Omega Centauri, because the low position of the object on the southern horizon triggered the limit switch on the telescope designed to prevent the telescope optical tube from striking the base of the telescope mount. Fortunately, Omega Centauri was visible through the telescope finder, and the telescope was manually centered on the object for CCD imaging. These images were purposely obtained in the early morning, because the light pollution from Tucson is less than in the evening, and the sky is steadier. The observatory sits approximately 6 miles directly north of the center of Tucson.
omega.jpg (39670 bytes)
Omega Centauri

**The color image of NGC5128 was obtained at 11:30pm on 28 April 2001 as the object culminated low on the southern horizon. It was imaged with the object sitting in the sky just above my house and the city lights of Tucson. This image consists of three 60sec red (R), three 60sec green (V), and five 60sec blue (B) images combined into a final color image.