Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  24 Cep  ·  The star 24Cep  ·  VdB149  ·  VdB150
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vdB149 and 150, LDN1235; Cepheus, Thomas V. Davis
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vdB149 and 150, LDN1235; Cepheus

Getting plate-solving status, please wait...
vdB149 and 150, LDN1235; Cepheus, Thomas V. Davis
Powered byPixInsight

vdB149 and 150, LDN1235; Cepheus

Equipment

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Acquisition details

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Description

van den Bergh 149 and 150, LDN1235; Cepheus

Astro Systeme Austria N12 f/3.5 astrograph (LUM)

Takahashi FSQ-106 f/5 astrograph (RGB)

KAI-11000M; SBIG STL (Lum), FLI Microline (RGB)

Total Exposure 10.6+ hours; LRGB 260:120:120:120 minutes, unbinned

April-May 2008; Inkom, ID USA

Comments: These two reflection nebulae are rarely imaged and this image may well have been a premiere for amateur astroimaging at the time of its publication (published 2008). vdB 149 is the blue reflection nebula on the center left; vdB150 the center right. The darker nebula just "above" vdB150 is Lynds Dark Nebula 1235. It is likely an Extended Red Emission nebula (ERE). These ERE are galactic dark nebulae at high latitudes that become visible through illumination by the interstellar radiation field. ERE is a dust-luminescence process, which appears in a broad band extending in wavelength across the R-band (Schedler).  This image is a composite-hybrid between two images taken with telescopes of different focal lengths. These nebulae have very low surface brightness and pose a significant challenge in imaging them. There are even fainter wisps of dust that make up the sky background. These small clouds are yet uncatalogued as far as I can find through research.

vdB149: Size (arcmin): 11 by 7.5

Type: illuminating star inside nebula

Surface brightness: moderate

Color: very blue

Absorption: moderate

Illuminating star ID1: BD+72 1018

Mag. of illuminating star: 9.79

Spectral type of star: B8V

vdB 150: Size (arcmin): 16 by 4

Type: illuminating star inside nebula

Surface brightness: moderate

Color: very blue

Absorption: strong

Illuminating star ID1: BD+72 1020

Illuminating star ID2: HD210806

Mag. of illuminating star: 8.35

Spectral type of star: B8IV

Comments

Sky plot

Sky plot

Histogram

vdB149 and 150, LDN1235; Cepheus, Thomas V. Davis