| Designation |
NGC
7635 - The Bubbble Nebula & Messier 52 (NGC7654)
|
| Type | Emission Nebula & Open star cluster |
| Constellation | Cassiopeia |
| Coordinates |
Telescope
centered at RA '20 20 59' Dec '+61 09 56'
|
| Magnitude | 8.5 & 6.9 respectively |
| Size | 10 & 15 Light Years across respectively |
| Distance | 7,100 & 3,900 light years from Earth |
| Dimensions | 15 x 8 & 12 x 12 arcminutes |
| Image Field | 90.6 x 113 arcminutes |
|
Notes:
|
The Bubble nebula took shape as raging stellar winds from it's giant central star (40 times as massive as our Sun) pushed a bubble-like shell of expanding gas outward. At the same time a nearby molecular cloud exerts counter pressure to contain it. |
| The bubble of gas is expanding at a rate of 4 million miles per hour. | |
|
|
The open star cluster M52 is about 50 million years old. |
| Telescope | Takahashi FS60C f/5.9 on Losmandy G-11 with Gemini L3 |
| Focal Length | 264 mm @ f/4.4 with Takahashi focal reducer |
| Guiding | Starlight Xpress SXV guidehead through 10" SCT @ f/6.3 |
| Telescope Control | Maxim DL (V3) |
| 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 | 5.23 arcsec/pixel |
| Filters |
1.25" Astronomik Type II Dichroic
IR blocking filters in Astronomik filter drawer - Clear, Red, Green,
Blue, Ha
|
| Exposures |
Total exposure time: 164 minutes -Ha 15 x 5 (75)
unbinned - Luminance 4 x 5 (20) unbinned, R & G 7
x3 (21) each binned 2x2. B 9 x 3 (27) Ha & Luminance
mixed 80/20% for LRGB, Red mixed 50/50% with Ha.
Sigma combined
|
| Calibration | Bias frames |
| Processing Software | Maxim DL, Photoshop CS (8.0), Neat Image |
| Location | Chiefland Astronomy Village, FL - 29.393 N , - 82.863 W |
| Date/Time | 09/19/04 '07:02' - '10:01' UT' |
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