| Designation |
Messier 94 (NGC 4736)
|
| Type | Spiral Galaxy (with inner ring) - type SA(r)ab III |
| Constellation | Canes Venatici (The Hunting Dogs) |
| Coordinates | Telescope centered atRA '12 50 54' - Dec '+ 41 07 06' |
| Magnitude | 8.2 |
| Size | 33,000 light years in diameter |
| Distance | 15-33 million light years (still some ambiguity) |
| Dimensions | 13 x 11 arcminutes |
| Image Field | 22 x 16 arcminutes |
|
Notes:
|
M94 is located in the Canes Venatici I Galaxy Cloud. It is the victim of a violent explosion several miollion years ago. The inner ring contains an area of active star formation, full or young (blue) stars. The outer ring is much less bright and contains older (yellow) star populations. |
| M94 is a bit unusual in that it has a 3rd outer region which also contains an active star birthing region. The galaxy group to which it belongs is frequently referred to by it's name (M94 group). | |
|
|
| Telescopes | Meade 10" LX200 f/10 on Losmandy G-11 with Gemini L3 |
| Focal Length | 1575 mm @ f/6.3 |
| Guiding | SXV guidehead through Takahashi FS60C @ f/5.9 |
| Telescope Control | Maxim DL (V4.07) |
| CCD Camera |
Starlight Xpress SXV-H9 - USB 2 ExView progressive scan
1392
x 1040 (6.45 uM) pixel array (8.98 x 6.71 active area)
|
| Image Scale | .88 arcsec/pixel |
| Filters |
1.25" Astronomik Type II Dichroic IR blocking
filters in Astronomik filter drawer - Clear, Red, Green, Blue
|
| Exposures |
Total
exposure time: 142 minutes: Luminance 80 (16 x 5) unbinned,
R- 20 (10x2) , G- 18 (9x2), B- 24 (12x2) minutes each binned
2x2
Sigma combined
|
| Calibration | bias |
| Processing Software | Maxim DL, Photoshop CS (8.0), NEAT image (color channel smoothing) |
| Location | Chiefland Astronomy Village, FL - 29.393 N , - 82.863 W |
| Date/Time | 04/09/05 - 04:14 - 06:52 UT |
