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Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  LBN 643  ·  LDN 1355  ·  LDN 1357  ·  LDN 1358  ·  RZ Cas  ·  SU Cas
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Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl

Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia

Getting plate-solving status, please wait...
Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl

Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia

Equipment

Imaging Telescopes Or Lenses
TS-Optics Photoline 130mm f/7 FPL53 Triplet Apo (APO130f7-P)
Imaging Cameras
ZWO ASI2600MM Pro
Mounts
Sky-Watcher EQ6-R Pro
Filters
Astronomik Deep-Sky Blue · Astronomik L-3 Luminance UV/IR Block · Baader Green (G-CCD) · Baader Red (R-CCD)
Accessories
Lacerta MFOC Motorfocus · Pegasus Astro Falcon Rotator · TS-Optics Photoline 3" 0.79x ED Reducer/Corrector (TSRED379) · ZWO EFW 7 x 36mm
Software
Adobe Photoshop · Aries Productions Astro Pixel Processor (APP) · Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA)
Guiding Telescopes Or Lenses
SVBony SV106 60mm Guide Scope
Guiding Cameras
ZWO ASI120MM

Acquisition details

Dates:
Oct. 27, 2021 ·  Oct. 28, 2021
Frames:
Astronomik Deep-Sky Blue: 123×60″(2h 3′)
Astronomik L-3 Luminance UV/IR Block: 310×60″(5h 10′)
Baader Green (G-CCD): 123×60″(2h 3′)
Baader Red (R-CCD): 125×60″(2h 5′)
Integration:
11h 21′
Avg. Moon age:
21.39 days
Avg. Moon phase:
57.97%
Mean FWHM:
20.20

RA center: 02h52m16s.87

DEC center: +69°14′36″.1

Pixel scale: 1.050 arcsec/pixel

Orientation: -89.662 degrees

Field radius: 1.003 degrees

WCS transformation: thin plate spline

More info:Open 

Find images in the same area

Resolution: 5818x3637

File size: 14.0 MB

Data source: Backyard

Description

The image shows the region around the stars RZ CAS and SU CAS in the constellation Cassiopeia. I intended to highlight the dark nebulae and filaments in that area and reveal as much as possible of the reflexion nebulae VdB 7 and VdB 9. There are also some dark nebulae in the frame (i.e. LDN 1355, 1357, 1358, see anntotated version D). Together they form a dark nebula composition that is sometimes calle "The Helping Hand" which is of course upside down in my image. The other bright star in the field SU CAS is a Cepheid star.

Shooting into this region was proposed by a friend whose focus was more on the variable star RZ CAS. RZ CAS is an eclipsing star with a period of 1.2 days. Image revision C is a fast-foreward gif-animation of the brightness variation I could capture in my Lum light frames.

I loaded the normalized frames into MuniWin and let it calculate the brightness variation curve of RZ CAS for that eclipse (see revision D). So this project was also my first attempt of a photometric astro work. The calculated curve has two gaps. The first one was caused by the meridian flip procedure that fell into the time of the eclipse. The second gap was caused by clouds. In the literature I found a maximum variation of 1.5 mag while mine is much less. This may be caused by the fact that in RZ CAS is quite saturated in my 60 s exposures which might have compromised the measurements.

Comments

Revisions

  • Final
    Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
    Original
  • Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
    C
  • Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
    D
  • Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl
    E

C

Description: Brightness Variation of RZ CAs

Uploaded: ...

D

Description: Brighness Variation of RZ Cas (photometric)

Uploaded: ...

E

Description: Annotated Version

Uploaded: ...

Sky plot

Sky plot

Histogram

Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, pete_xl

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