This is a followup to my recent
image of same area, but this time a mosaic with another panel. I want to thank
@Almos Balasi who alerted me that my image was missing a very important object at the bottom, that is, the Gyulbudaghian's variable Nebula which is a bipolar reflection nebula, similar to the famous Hubble's Variable Nebula. So, 3 more nights capturing in my backyard to come up with what I am posting as a new image. Touch capture in bortel 7, but doable with the hyperstar; also tough processing. (I wish I knew how to superimpose an image without Photoshop, so instead I just posted different versions.)
Fascinating from Newbury
Astro: PV Cephei is a young Herbig Ae type variable star located in the constellation of Cepheus at RA 20:45:54 Dec +67:57:39. It is embedded in a dense molecular cloud from which it formed. Young stars like this are accreting material from a rotating disc surrounding the star. The accretion process often creates a strong magnetic field in the star which in turn causes bipolar outflows and jets along the magnetic axes of the star. In the case of PV Cephei, one of these outflows from the star has cleared a conical cavity out through the edge of the molecular cloud and light from the star is illuminating the inside of this cavity creating a fan-shaped reflection nebula adjacent to the star. The accretion process from the disc onto the star varies randomly causing the star to brighten and fade on a timescale of months. This in turn changes the illumination of the nebula which we see as changes in its apparent size, shape and brightness. More information here:
https://observing.skyhound.com/archives/oct/GM_1-29.html
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