| Designation |
NGC 6960, 6974, 6979
- The Bridal Veil aka Cirrus, Network and Filamentary nebula. Central
portion (right center of image) known as Pickerings Triangular Wisp.
|
| Type | Supernova remnant and emission nebula |
| Constellation | Cygnus - "The Swan" |
| Coordinates | Telescope centered at RA '20 48 55' Dec '+31 04 38' |
| Magnitude | |
| Size | The nebula is expanding at a rate of 100 km/second |
| Distance | 2,500 light years |
| Dimensions | 6960 - 70 x 6 arcminutes, 6974-6979 - 45 x 30 arcminutes |
| Image Field | 90.6 x 131.3 arcminutes |
|
Notes:
|
The Veil is a supernova remnant, which is the remains of a star that dramatically exploded about 35-40 million years ago. The discarde material was ejected into space and shows primarily |
|
as hydrogen, but the cloud is
also enriched with heavy elements. The portion imaged above represents
the Western and Central portions of the larger "Great Cygnus Loop".
The Veil was discovered by William Hershal in 1784.
| |
|
|
| 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/3.3 |
| Telescope Control | Maxim DL (V4.5) |
| 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 filter in True technology filter wheel- Red, Green,
Blue, Ha, SII, OIII
|
| Exposures |
Total exposure time: 210 minutes
- Ha, SII, OIII all - 7 x 10 minutes unbinned. All Sigma
combined.
LRGB image shot on a seperate occassion - 180 minutes
|
| Calibration | None |
| Processing Software | Maxim DL 4.5, Photoshop CS (8.0) |
| Location |
Chiefland
Astronomy Village, FL - 29.393 N , - 82.863 W
|
| Date/Time | 1/04/05 00:02 - 03:46 UT - narrowband |
