| Designation |
IC1805
-The Heart Nebula & Melotte 15
|
| Type | Emission Nebula & Open star cluster |
| Constellation | Cassiopeia |
| Coordinates |
Telescope
centered at RA '02 34 12' Dec '+61 15 25'
|
| Magnitude | 6.5 (open cluster) |
| Size | |
| Distance | 6,150 light years |
| Dimensions | approximately 60 x 60 arcminutes |
| Image Field | 90.6 x 113 arcminutes |
|
Notes:
|
The Heart nebula is a very faint emission nebula, which is illuminated by the central star cluster Melotte 15. It is a very challenging object for visual observation requiring dark skies and a large aperture telescope. |
| The larger version of this image has the high resolution central portion imaged with the 10" SCT superimposed on the widefield image. | |
|
|
| 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 - Green, Blue,
Ha
|
| Exposures |
Total exposure time: 142 minutes -Ha 18 x 5 (90) unbinned
- Green 6 x4 (24), Blue 7 x 4 (28) each binned
2x2.
Ha, HaGB for LRGB color combine
Individual frames 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 | 10/16/04 '06:12' - '08:51' UT' |
