Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  The star 6Dra, The star κDra
Getting plate-solving status, please wait...
Kappa Draconis - a blue giant star, 





    
        

            Thomas Richter
Kappa Draconis - a blue giant star

Kappa Draconis - a blue giant star

Technical card

Resolution: 5379x3557

Dates:April 21, 2019

Frames:
Baader B 1.25'' CCD Filter: 23x120" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 23x120" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 23x120" (gain: 53.00) -20C bin 1x1

Integration: 2.3 hours

Darks: ~37

Flats: ~27

Avg. Moon age: 16.95 days

Avg. Moon phase: 94.71%

Astrometry.net job: 2655772

RA center: 188.688 degrees

DEC center: 69.908 degrees

Pixel scale: 0.493 arcsec/pixel

Orientation: 88.639 degrees

Field radius: 0.442 degrees

Locations: Nürnberg, Nürnberg, Bayern, Germany

Data source: Backyard

Description

From Wikipedia, the free encyclopedia:

Kappa Draconis, Latinized from κ Draconis, is a blue giant star located in the northern circumpolar constellation of Draco. At an apparent magnitude of 3.88, it is barely visible to the naked eye when artificial lighting from cities is present. Nevertheless, it is a powerful star, approximately five time as massive as the Sun. It is about 490 light-years away, and is 1,400 times brighter than the Sun.

Kappa is thought to be just entering its red giant phase, having exhausted the supply of hydrogen in its core. Over the next several thousand years, the star will expand, becoming more powerful but with a much cooler surface temperature. Tens of thousands of years from now, Kappa Draconis will appear much brighter, probably shining with a reddish hue.[citation needed]

The star is currently located at declination 69° 47' 18" North (RA 12h 33m 29.0s), but due to the effects of precession, Kappa Draconis was the nearest star to the North Celestial Pole visible to the naked eye from 1793 BC to approximately 1000 BC, though it was 6° removed from perfect alignment, making it only an approximate pole star, similar to the roughly 7° variance from perfect alignment of the much brighter (magnitude 2.08) star Kochab, at the same time during Earth's precession

Comments

Author

superelch
Thomas Richter
License: None (All rights reserved)
2963
Like

Revisions

  • Kappa Draconis - a blue giant star, 





    
        

            Thomas Richter
    Original
  • Kappa Draconis - a blue giant star, 





    
        

            Thomas Richter
    C
  • Final
    Kappa Draconis - a blue giant star, 





    
        

            Thomas Richter
    D

Sky plot

Sky plot

Histogram

Kappa Draconis - a blue giant star, 





    
        

            Thomas Richter

In these public groups

Astrofreunde-Franken