NGC 7129 and NGC 7142
Characteristics:
RA: 21h 43m 49s
Dec: +65 degrees 59' 38"
PA: plus 25 degrees
Description:
NGC 7129 (upper right) is a beautiful
star forming nebula, located in a dusty region of the constellation
Cepheus. In the lower left of this image, it is accompanied by
the star cluster NGC 7142. The stars forming within NGC 7129 are
relatively young, around 1-2 million years old, and many of them are
not easily observed in visible light photographs such as this, but are
more evident in Spitzer
infrared telescope images. There are several Herbig-Haro
objects in NGC 7129, show in red in the above object, representing
streams of hot jets emitted by newly formed stars. Interestingly,
there is evidence of photoluminescence
in the center of NGC 7129, represented by the pinkish stripe within the
heart of the nebula shown above. This is not Ha emission, but
rather represents heating of dust within this region, which in turn
re-emits in a broadband of red visible light. There are many
similarlities between NGC 7129 and the Iris Nebula,
including the fact that both are star forming regions within a dusty
area of space, both have a dominant reflection (blue) component, and
both exhibit photoluminescence. More information about NGC 7129
may be found in Rob
Gendler's
website.
Photographic
Details:
Dates: August 24, 25, 26, 2019
Scope: VC200L at f6.3, on the Takahashi NJP
Mount
Autoguider: SBIG ST-402
Camera: SBIG ST8300 -15C
Filters: Baader LRGB
Exposures: Total
exposure 12 hours
Post-processing:
Calibrated, aligned and
stacked in Maxim, followed
by DDP
in ImagesPlus (IP). Further
processing in Photoshop CS (16
bit format)
Please
note: Graphics on this website
may not be reproduced without author permission.
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