CTB1 - Supernova Remnant
Supernova Remnant in Cassiopeia
RA: 23h 59m 12s; Dec: +62° 23′ 33″; Dist: ~5200 ly
| Hardware | |
| Imaging Instrument | 4 Inch Refractor at Prime Focus |
| Focal Length | 530 mm |
| Focal Ratio | 5.0 |
| Imaging Camera | QSI 683ws-g |
| Guiding Instrument | OAG via QSI IGP |
| Guiding Camera | Starlight Xpress Lodestar X2 |
| Software | |
| Image Capture | Sequence Generator Pro |
| Guiding | PHD v2 |
| Image Processing | PixInsight |
| Exposure | |||||
| Total Image Frames | 556 | ||||
| Total Image Time | 125 hours | ||||
| Filter | Frames | Exposure | Elapsed Time | Start Date | End Date |
| Lum | 140 | 180 sec | 7 hours | 17-Aug-2017 | 16-Dec-2017 |
| Red | 72 | 300 sec | 6 hours | 17-Aug-2017 | 15-Dec-2017 |
| Green | 72 | 300 sec | 6 hours | 17-Aug-2017 | 15-Dec-2017 |
| Blue | 72 | 300 sec | 6 hours | 17-Aug-2017 | 16-Dec-2017 |
| Hα | 100 | 1800 sec | 50 hours | 17-Jun-2017 | 18-Nov_2017 |
| Oiii | 100 | 1800 sec | 50 hours | 17-Jun-2017 | 19-Nov_2017 |
| Imaging Locations | Ft McKavett TX | ||||
| General Nathan Twining Observatory NM | |||||
| Kenton OK - Okie-Tex Star Party | |||||
| San Ysidro NM - White Ridge bicycle trails parking lot | |||||
| Tijeras NM | |||||
| Other Image Sizes |
| Full Resolution Image - email me |
| Big Image (3000x2400) |
| Large Image (1200x960) |
| Medium Image (900x720) |
| Small Image (600x480) |
| Object and Imaging Notes |
| The distance estimation (~5200 ly) is from Distance of "Three Supernova Remnants from H1 Observations in a Complex Region: G114.3+0.3, G116.5+1.1 and CTB 1 (G116.9+0.2)" by Uyaniker, et al, July 2003. |
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CTB1 is also known as Abell 85. Additionally, the brighter part, towards the bottom of the ring in this image,
is LBN 576, from Lynds Bright Nebula list. The name "CTB1" refers to CalTech "B" List, from Table 2 of the
paper "A Survey of Galactic Radiation at 960 Mc/s" by CalTech's R.W. Wilson and J.G. Bolton. Abell listed the object in his planetary nebula list. Later the object was comfirmed to be a supernova remnant. |
| The object is very dim. As you can see, it doesn't appear visually in the pure luminance, green, and blue channels and is barely visible in the red channel. One really needs narrow-band imaging to capture the object's details. |
| The composite luminance channel (below) is a combination of the pure luminance, Hα, and Oiii channels. This provides the luminance support for the two high-quality narrow-band channels. |
