Facts about Corona Borealis Constellation
- 09
Coronae Borealis contains a planetary nebula catalogued as NGC 6543, which spans approximately 20 arc-seconds across and displays a distinctive blue-green color from ionized oxygen emissions.
- 08
Approximately 470 light-years distant, the eclipsing binary star system Corona Borealis AB demonstrates gravitational interaction through periodic dimming visible from Earth.
- 07
Coronae Borealis contains T Coronae Borealis, a recurrent nova expected to erupt again around 2024 based on its approximately 80-year eruption cycle.
- 06
Epsilon Coronae Borealis orbits in a binary system with a separation of approximately 0.28 astronomical units, completing one full orbit every 41.6 days.
- 05
Coronae Borealis contains approximately 30 known variable stars, making it exceptionally rich in stellar variability compared to other small constellations.
- 04
R Coronae Borealis, a hydrogen-deficient carbon star, undergoes unpredictable deep fading episodes dropping up to 8 magnitudes below its normal brightness.
- 03
Seven main stars form the distinctive arc pattern of Corona Borealis, representing the crown given to Ariadne in Greek mythology.
- 02
In 1946, the recurrent nova T Coronae Borealis last erupted, brightening from magnitude 10.8 to 2.0 in just two days.
- 01
The brightest star Alphecca in Corona Borealis shines at magnitude 2.23, located approximately 75 light-years from Earth.