NGC 1555 - Hind's Variable Nebula
|
CLICK ON IMAGE FOR FULL SIZE VIEW (3352x2514) Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 19 December 2019, Camera: ST8300M (Baader LRGB filters) Exposure:
Exposure: 24 x 12min (1x1 bin) exposure with UV/IR block filter, 8 x
5 min (2x2 bin) each RGB
exposures.
Processing: Data
Collection - Sequence Generator Pro (as FITs). Subframe calibration
- Pixinsight. Subframe registration and integration (Median combine - Winsorized Sigma
Clipping) - PixInsight. Non-linear stretching, normalization and
gradient removal - PixInsight. Generation of starless nebulosity images
for later processing - starnet++. Curves, Levels, RGB combine, Luminance
layering - PixInsight. Stars and Starless combine - PixInsight. Final finishing - Photoshop. RGB calibration
- eXcalibrator. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This image is a RGB combine with
Luminance layering. Images processed at 3352 x 2532 resolution. Final
Image size is approximately 3352x2514. North is up in this image. This
image shows a region of interstellar material, Hydrogen, and dust illuminated by nearby stars.
The central part of this image is NGC 1555 commonly known as Hind's Variable
Nebula. The nearby illuminating / energizing star is T Tauri. This star is the
prototype of a T Tau variable star - characterized by the surrounding variable
nebula with its outbursts. NGC 1555 is also known as SH2-238, Cederblad
32b and closely nearby vdB 28. In a broader but uncertain region around NGC 1555
is Struve's Lost Nebula (NGC 1554). It is believed to have been a brief outburst
nebula at the time of Struve's observation and its location may be somewhat
uncertain. Within this area is also LBN 817, Cederblad 32a, 32c , dark nebulae
and a molecular cloud. These objects
and some of the brighter stars are identified in the annotated
image. Horizontal FOV is approximately 88 arc minutes. Full size
image scale is 1.57 arcsec/pix. Image center is approximately - Equatorial 2000: RA: 04h 21m 56s Dec: +19°22'53"
|
All images and content remain the property of Jim Thommes - copyright 2003 - 2020Current Web Total Hits - - Unique Visitors |