NGC7293, The Helical Nebula
Planetary Nebula
Magnitude 6.3
Size: 16 x 12 arc minutes
Constellation: Aquarius
RA: 22h 30m
Dec: -20.8°
This image was used in this Sky and Telescope article By Sue French.
Imaging Equipment:
- Telescope: Takahashi FS-152 f/8 fluorite refractor operating
at f/6
- Zeiss II German Equatorial Mount
- Santa Barbara Instrument Group ST-8E CCD camera (1530 x 1020
pixels, 9 x 9mm, monochromatic, 16 bit, 13.8 x 9.2mm
array)
- CWF8 Color filter wheel with IR-blocking clear and RGB dichroic filters
Exposure Information:
- Date: Tuesday July 4, 2000
- Location: Mount Pinos, CA
- Elevation: 8300'
- Exposures (unbinned):
|
White-light: |
7 exposures @ 10
minutes each |
|
Red-light: |
1 exposure @ 10
minutes |
|
Green-light |
1 exposure @ 10
minutes |
|
Blue-light: |
1 exposure @ 10
minutes |
|
Total exposure time: |
100 minutes |