Hemisphere:  Northern  ·  Contains:  NGC 869  ·  NGC 884  ·  chi Persei Cluster  ·  h Persei Cluster
Getting plate-solving status, please wait...
Double Cluster - h Persei and χ Persei, 



    
        

            Thomas Richter
Double Cluster - h Persei and χ Persei
Powered byPixInsight

Double Cluster - h Persei and χ Persei

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Technical card

Imaging telescopes or lenses: GSO 8" f/5 Newton

Imaging cameras: ZWO ASI 183 MM PRO

Mounts: SkyWatcher NEQ6 Pro Goto

Guiding telescopes or lenses: GSO 8" f/5 Newton

Guiding cameras: Astrolumina Alccd5L-IIc

Focal reducers: Pal Gyulai GPU Aplanatic Koma Korrector 4-element

Software: PhotoShop CS5  ·  PHD2 Guiding  ·  FitsWork 4  ·  DeepSky Stacker Deep Sky Stacker 3.3.4  ·  CCDCiel

Filters: Baader R 1.25'' CCD Filter  ·  Baader B 1.25'' CCD Filter  ·  Baader G 1.25'' CCD Filter

Accessory: TSOptics TS Off Axis Guider - 9mm


Dates:Sept. 15, 2020

Frames:
Baader B 1.25'' CCD Filter: 20x300" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 20x300" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 20x300" (gain: 53.00) -20C bin 1x1

Integration: 5.0 hours

Darks: ~37

Flats: ~23

Flat darks: ~100

Avg. Moon age: 27.31 days

Avg. Moon phase: 5.48%


Basic astrometry details

Astrometry.net job: 3954169

RA center: 2h 20' 29"

DEC center: +57° 7' 51"

Pixel scale: 0.494 arcsec/pixel

Orientation: 358.206 degrees

Field radius: 0.452 degrees


Resolution: 5489x3641

Locations: Nürnberg, Nürnberg, Bayern, Germany

Data source: Backyard

Description

Object description (wikipedia.org):

NGC 869 has a mass of 3,700 solar masses and NGC 884 weighs in at 2,800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years.

There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s). Their hottest main sequence stars are of spectral type B0. NGC 884 includes five prominent red supergiant stars, all variable and all around 8th magnitude: RS Persei, AD Persei, FZ Persei, V403 Persei, and V439 Persei.

Comments

Author

superelch
Thomas Richter
License: None (All rights reserved)
2446
Like

Sky plot

Sky plot

Histogram

Double Cluster - h Persei and χ Persei, 



    
        

            Thomas Richter