Table of Contents
What is the temperature and luminosity of Regulus?
Regulus has a spectral type of B7V, a surface temperature of 10,300° Kelvin and a luminosity 150 times the Sun. It has a mass of 3.5 solar masses and a diameter 3.2 times the Sun.
Is Regulus bigger than the Sun?
Regulus A is 3.8 times the mass of the sun, about three times as wide, and almost 288 times brighter.
Is Regulus the brightest star in Leo?
Regulus is a bright star seen in the constellation Leo. It’s the brightest star in the constellation and among the brightest in Earth’s night sky. The star has two known companions nearby, a set of binary stars, but observations in the past few years suggest there may be a white dwarf lurking close to Regulus as well.
What degree of Leo is Regulus?
Regulus
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Apparent magnitude (V) | 1.40 |
| Regulus BC | |
| Right ascension | 10h 08m 12.8/14s |
| Declination | +11° 59′ 48″ |
What star system is Regulus a in?
Regulus
Regulus A/Star system
Why is Regulus so bright?
It is spinning extremely rapidly, with a rotation period of only 15.9 hours, which causes it to have a highly oblate shape. This results in so-called gravity darkening: the photosphere at Regulus’ poles is considerably hotter, and five times brighter per unit surface area, than its equatorial region.
Is Regulus a high mass star?
Star System Regulus B is a main-sequence star. It has a lower mass than our sun, at around 0.8 solar masses. It is also much cooler than our sun at temperatures around 4.885 Kelvin.
How bright is Regulus?
Regulus, also called Alpha Leonis, brightest star in the zodiacal constellation Leo and one of the brightest in the entire sky, having an apparent visual magnitude of about 1.35. It is 77 light-years from Earth.
How do you identify Regulus?
Location. Regulus is pretty easy to find in the sky. The star is part of the Sickle of Leo, a prominent asterism in the constellation Leo, and marks the lower end of the Sickle’s handle. The asterism looks like a backwards question mark and outlines the head of the celestial lion.
How hot is Regulus?
13,000 degrees
The temperature at the surface of Regulus is a toasty 13,000 degrees, compared to around 6,000 for our yellow sun. Regulus is a fairly nearby star, at 77.6 light years, and is far brighter than your average star, 197 times brighter than our sun.
What is the surface temperature of Regulus a?
The main star, called Regulus A, is large and blue, with a spectral type of B8 IVn. Its surface temperature averages about 12,460 Kelvin (roughly 21,970 degrees F or 12,190 degrees C), much higher than the sun’s surface temperature of 5,778 Kelvin (9,941 °F or 5,505 °C).
What kind of star is Regulus in Leo?
Regulus is a Main Sequence Star type star. Regulus is a main star in the constellation Leo and makes up the constellation outline. Based on the spectral type (B7V) of the star, the star’s colour is blue .
Is the Regulus star hotter than the Sun?
Other ancient cultures also saw it as a herald of kingly power. Under modern classifications, Regulus is considered a blue-white “B” star that lies on the main sequence of stellar evolution. While Regulus, like the sun, fuses hydrogen to helium in its center, it is more massive than the sun and therefore hotter and brighter.
What are the facts about the constellation Regulus?
Regulus 1 Facts. Regulus lies only 0.46 degrees from the ecliptic, the Sun’s apparent path across the sky, through the zodiac constellations, and is regularly occulted by the Moon and very rarely 2 Star system. The Regulus star system consist of four components, or two pairs of stars. 3 Location. Regulus and the Sickle of Leo.