| Designation |
NGC 2403
|
| Type | Eliptical Spiral Galaxy (Type SAB(s)cd III) |
| Constellation | Camelopardalis (The Giraffe) |
| Coordinates | Telescope centered at RA '07 36 24' - Dec ' + 65 36 03' |
| Magnitude | 8.5 |
| Size | Approximately 37,000 light years across |
| Distance | 8 million light years |
| Dimensions | 14 x 13 arcminutes |
| Image Field | 15 x 20.3 arcminutes |
|
Notes:
|
NGC 2403 is an outlying member of the M81/M82 galaxy group. This was the first galaxy beyond our own local group that had a Cepheid variable star identified in it (by Alan Sandage). |
| Cepheid variables are stars with a dependable cycle of varying brightness, which is tied to it's luminosity. This makes them handy sign posts for calculating distance. | |
|
|
| 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 (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 | .88 arcsec/pixel |
| Filters |
1.25"
Astronomik Type II Dichroic IR blocking filters in Astronomik filter
drawer - Clear, Red, Green, Blue, Ha
|
| Exposures |
218 minutes total exposure:
Luminance 90 (20 x 5) unbinned, Red, Green, Blue and Ha all 32 minutes
each (8 X 4) binned 2x
|
| Calibration | bias |
| Processing Software | Maxim DL, Photoshop CS (8.0), NEAT Image |
| Location | Chiefland Astronomy Village, FL - 29.393 N , - 82.863 W |
| Date/Time | 11/09/04 / '06:02' - '09:59' UT |
