M 101 - NGC 5457

• TYPE:  Spiral Galaxy, Type SAB(rs)cd I-II
• RA: 14h 03.2'
• DEC:  +54degrees 21'
• SIZE:  28.9' X 26.9'
• VISUAL MAGNITUDE:  7.9
• SURFACE BRIGHTNESS:  14.8
• CONSTELLATION:  Ursa Major
• DISTANCE:  17.5 Million Light Years
• DIAMETER:  118 Thousand Light Years

IMAGING INFORMATION

• TELESCOPE:  RCOS Carbon fiber 10 inch R/C reflector, on a Parramount GT1100
• REDUCER/CORRECTOR:  None / operating at 9.0 FL
• CAMERA:  Santa Barbara Instruments Group, ST-8XME Digital (Thermoelectrically cooled)
• ADAPTIVE OPTICS:  None, Off-axis guiding with a ST402XME and an Astro Don ROAG
• FILTER(S):  Astro Don LRGB
• CCD COOLING TEMPERATURE:  -20 C
• BINNING/RESOLUTION:  2 X 2 (765 X 510) L 1530x1020
• EXPOSURE TIME:  80 min.
• NUMBER OF IMAGES:  14
• FILM SPEED:  N/A
• DATE/TIME:  1-1-2009 / 11:49:05.736 UTC
• LOCATION:  Valley Center, California
• TEMPERATURE:  48degrees
• HUMIDITY:  71%

All the images in this site are © Copyright 1999 to Infinity by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited..