What is the luminosity and temperature of Pollux?
What is the luminosity and temperature of Pollux?
Pollux has a spectral type of K0III, a surface temperature of 4865° Kelvin and a luminosity 32 times the Sun. It has a mass of 1.86 solar masses and a diameter 8 times the Sun.
Is Pollux brighter than Castor?
At an apparent visual magnitude of 1.14, Pollux is the brightest star in its constellation, even brighter than its neighbor Castor (α Geminorum).
How much brighter is Pollux than the sun?
A relatively close 34 light-years away, Pollux is just under two times the mass of our sun, almost nine times the diameter of the sun, and about 30 times the sun’s brightness in visible light. Pollux also pumps out a good bit of energy in non-visible infrared radiation.
Is Pollux a high mass star?
Pollux is a orange-red giant star of spectral and luminosity type K0 IIIb. Given that Pollux has a higher mass and is more evolved than Sol, the star is likely to be much younger than Sol’s 4.6 billion years. Its relatively high mass estimates, however, suggest that it has not yet suffered substantial mass loss.
What is the luminosity of Betelgeuse?
100,000-times
Betelgeuse’s luminosity is 100,000-times that of the Sun. However, its surface is also cooler – 3,600 K versus the Sun’s 5,800 K – so only about 13% of its radiant energy is emitted as visible light. Traditionally, Betelgeuse is classified as a pulsating variable star.
What is the luminosity of Capella?
78.7
Capella
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Luminosity (bolometric) | 78.7 ± 4.2 L ☉ |
| Surface gravity (log g) | 2.691 ± 0.041 cgs |
| Temperature | 4,970 ± 50 K |
| Rotation | 104 ± 3 days |
What is unusual Castor?
Castor is the second-brightest object in the zodiac constellation of Gemini and one of the brightest stars in the night sky. Although it is the ‘α’ (alpha) member of the constellation, it is fainter than ‘β’ (beta) Geminorum, Pollux.
What will happen when Pollux dies?
Over time, Pollux will get even bigger and brighter. Then it will expel its outer layers, briefly surrounding itself with a colorful bubble of gas. That bubble will quickly fade, though, leaving only the star’s small dead core — a hot ember known as a white dwarf.
What is the luminosity of Barnard’s Star?
0.0004 L☉
Barnard’s Star/Luminosity
What is the luminosity of the star Rigel?
120,000 times
Located 863 light-years away, Rigel’s computed luminosity is an incredible 120,000 times the brightness of our sun. Its surface temperature is also far hotter than the sun, around 21,000 degrees Fahrenheit (11,600 degrees Celsius). Compare that to 10,000 degrees F (5,500 degrees C) for the sun.
What type of star is the star Pollux?
The Star. Pollux is a orange-red giant star of spectral and luminosity type K0 IIIb. It has about 1.7 +/- 0.4 times Sol’s mass (Allende-Prieto and Lambert, 2000; and Drake and Smith, 1990), 8.8 +/- 0.1 times its diameter (Hatzes et al, 2006), and 32 times its visual luminosity.
How many light years away is Pollux from Earth?
Locating Pollux. The giant star lies close to Earth, about 35 light-years away, with a luminosity of about 32 times that of the sun, according to NASA. Its apparent magnitude is 1.14, making it the 17th brightest star in the night sky.
What is the difference between Castor and Pollux?
Pollux, which is slightly closer to us, is a single star, while Castor is a star system consisting of six stars. Pollux is an evolved giant, orange in colour, with the stellar classification K0IIIb. The “b” indicates that the star is less luminous than average for its class.
What is the mass of Pollux’s Solar System?
The Pollux’s solar mass is 1.91 times that of our star, the Sun. The Sun’s Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.