3towers Observatory - NGC, IC, and Other Interesting Objects 6

3towers Observatory Images of Selected NGC, IC, and Other Interesting Objects

All images are oriented with the North at the top and the West to the right.

Object	Other Name(s); Comments	3towers Images	Comments; Image Data; Equivalent Grasslands Observatory Image
NGC5005			This image is a composite of five 60sec exposures through an open filter slot added to 60sec exposures through red, green (V), and blue filters.
NGC5128	Centaurus A; Arp153	B&W Color
NGC5139	Omega Centauri
NGC5248			This image is a composite of ten 60sec exposures through a clear filter added to 60sec exposures through red, green (V), and blue filters.
NGC6302	Bug Nebula		This image is a composite of four 60sec exposures through a clear filter added to 60sec exposures through red, green (V), and blue filters.
NGC6709		AP7 Image	This image is a composite of 5 one-minute exposures combined by median addition.
NGC6738		AP7 Image	This image is a composite of 5 one-minute exposures combined by median addition.
NGC6772		AP7 Image AP7 Tri-Color Image	The black & white image is a composite of 15 one-minute exposures combined by median addition. The color image is a combination of five 60-second Red (R), five 60-second Green (V), ten 60-second Blue (B), and ten 60-second black white images. The black and white images were median combined to make a Luminance (L) image. These color filter and Luminance images were combined into a final color image.
NGC6781		KX260 Image AP7 Image AP7 Tri-Color Image	The AP7 tri-color image consists of three 60-second black & white images combined to form a luminance image used with three 60-second Red (R), three 60-second Green (V), and five 60-second Blue (B) images to make a final color image.
NGC6804		AP7 Image	This image is a composite of 3 one-minute exposures combined by median addition.
NGC6814		AP7 Image	This image is a composite of ten one-minute exposures combined by median addition.
NGC6888	Crescent Nebula		This AP7 tri-color image consists of five 60-second black & white images combined to form a luminance image used with one 60-second Red (R), one 60-second Green (V), and two 60-second Blue (B) images to make a final color image.
NGCCC6992	Veil Nebula		AP7 Color Image.
NGC7293	Helix Nebula		The image quality for this object is poor. It suffers from the relatively small size of the telescope used for the imaging and from the fact that the object is faint and lies in the southern sky, such that it is always in the light pollution of Tucson. The 3towers Observatory is in the northern edge of the Tucson suburban area.
NGC7317, NGC7318A, NGC7318B, NGC7319, NGC7320; Arp319	Stephan's Quintet of Galaxies	KX260 Image AP7 Image	The KX260 image is a composite of thirty 60sec exposures added together. The AP7 image is a composite of forty-five 60sec exposures added together.
NGC7331		KX260 Image AP7 Image AP7 Color Image	The KX260 image is a composite of 8 one-minute exposures combined by median addition. The AP7 image is a composite of ten one-minute exposures combined by median addition. The AP7 color image consists of three 60-second black & white images through a clear filter combined to form a luminance image used with one 60-second Red (R), one 60-second Green (V), and two 60-second Blue (B) images to make a final color image.
NGC7635	Bubble Nebula		The black & white image is a composite of eighteen 60sec exposures added together. The AP7 tri-color image consists of five 60-second black & white images combined to form a luminance image used with one 60-second Red (R), one 60-second Green (V), and two 60-second Blue (B) images to make a final color image.