NGC7293, The
Helical Nebula
Planetary Nebula
Magnitude 6.3
Size: 16 x 12
arc minutes
Constellation:
Aquarius
RA: 22h 30m
Dec: -20.8°
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 |
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