Image Links | |
Published image | Full resolution |
Annotated image | Pop up preview Full resolution |
Target Information | |
Main Target Designations | [None] |
Companion Objects | IC1396 |
RA Center | 21h 35m 04.830s |
DEC Center | +57° 31' 07.19" |
Rotation | -0.138° |
Exposures | |
HαRGB | 690’/130'/130'/130' |
Hα subframes | 1800" @ 1x1 |
R/G/B subframes | 600" @ 1x1 |
Total Integration | 18hrs 0min |
Date(s) of acquisition | 24Aug2015, 03Sep2015, 04Sep2015, 12Sep2015, 15Sep2015 |
Locations | Whiteside, MO Hopkinsville, KY |
Equipment | |
Imager | SBIG STF-8300M |
Telescope/Lens | Orion 8" f/3.9 Astrograph |
Mount | Celestron CGEM |
Guiding Apparatus | OAG-8300 |
Guiding Camera | QHY5L-II |
Filter Wheel | FW5-8300 |
Wide Filters | Astronomik LRGB |
Narrow Filters | Astronomik 12nm Hα |
Accessories | |
Coma Corrector | Baader MPCC Mark III |
Collimator | Orion LaserMate |
Focusing | Bahtinov mask |
Software | |
Acquisition | Sequence Generator Pro |
Guiding | PHD2 |
Processing | PixInsight 1.8 |
This image presentation was last processed on 2017Feb25
The original version can be found here.
Easily my largest acquisition effort to date, the Elephant Trunk is another example of an emission nebula, containing grand cloud formations that resemble the likeness of its name.  Ionized by the large star to the left of the frame, this nebula takes on a very real, tangible shape that is another testament to the many forms clouds in our universe may take.  Though over 20 light years in length, the trunk (like most nebulae) is not dense.  In fact, it's less dense than typical vacuums we can form on Earth!  However, with its size condensed into a frame roughly the size of a full moon, we see a cohesive pillar of dust focused in the Hα wavelength.
After finally getting my gear to somewhat operate on its own for longer periods of time and getting comfortable sleeping in the car, I was able to discover what long integration times (20+ hours) could do for an image. Â I'm very proud of the dust detail that comes through in this photo, with poofs and plumes present throughout the trunk. Â However, I had some considerable trouble controlling large star halos and as a result have dialed back the RGB component considerably here. Â Though not displeasing, I'd have rather had more color throughout the stars. Â But as I've said in countless images before, it just gives me a reason to come back to this later!