GALLERY

vdB 141 (Sh2-136) - Reflection Nebula in Cepheus

LRGB combination (Click for a larger view 1800 x 1800 px)

 

B/W inverted image

Details

vdB 141 (Sh2-136) - Reflection Nebula in Cepheus

VdB 141 (also known as Sh2-136) is a reflection nebula joint in an emission nebula in the constellation of Cepheus. It is catalogued by Sidney van den Bergh in 1966 and it is often referred to as the Ghost Nebula due to several human-like figures with arms raised. Illuminating the nebula is a star still in the formation process identified as BD+67 1300 and is of type FU Orionis which is quite rare and exhibits very unusual brightening and dimming behavior.

VdB 141 is located in the western part of the constellation, about one degree to the east of the famous nebula NGC 7023. VdB 141 is an isolated Bok globule, located in the large dark nebulous system that masks the light of the Milky Way in the constellation of Cepheus, the distance is about 1470 light years. The central globule is known by the initials CB 230, it houses the infrared radiation source IRAS 21169 +6804, associated with a young stellar object at the center of a bipolar jet. Together with a nearby source it forms a pair of protostars that could constitute a binary system. The jet is oriented in a north-south and has a total length of about 0.06 light years.

A brief adapted information by courtesy: Outflows and jets from low mass protostars in Bok globules: the case of CB230
(F. Massi, C. Codella, J. Brand, L. Di Fabrizio, and J. Wouterloot)

Object details:

Right Ascension 21:16:26 (h:m:s)
Declination +68:15:37 (deg:m:s)
Distance ~ 1 470 (ly)
Brightness NA (mag)
Apparent Dimension

NA (arc min)

Image details:

Center of field RA 21:16:49 (h:m:s)
Center of field DE +68:14:10 (deg:m:s)
Size 36 x 36 (arcmin)
Pixel scale: 1.04 (arcsec/pixel)
Orientation: North is up

 

Annotation

Optic(s): RC 12" with Astro-Physics corrector @ f/5
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik LRGB set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: From 8 and 18 of August 2013
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L: 20x10 min, R: 9x10 min, G: 9x10 min, B:9x10 min, Total Exposure Time - 470 min (7:50 hours)

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided thanks to ASA DDM85 Premium mount
Processing:

PixInsight / PS

GALLERY


All Contents copyright Velimir Popov unless otherwise noted.