What is the radial velocity of Sirius B?
What is the radial velocity of Sirius B?
−7.6 km/s
2007 Schools Wikipedia Selection. Related subjects: Space (Astronomy)
| Observation data Epoch J2000 | |
|---|---|
| U-B colour index | −0.08 (A) / −1.04 (B) |
| Variable type | Eclipsing binary |
| Astrometry | |
| Radial velocity (Rv) | −7.6 km/s |
What is the mass of Sirius?
for our Sun. The mass of a star determines its luminosity (power), photosphere temperature, radius, and life cycle. Sirius is about 2.3 times the mass of the Sun (2.3 solar masses), or 4.6 x 1030 kilograms.
What is the density of Sirius B?
3.0 x 106 grams per cubic cm
Sirius B’s density is 3.0 x 106 grams per cubic cm, or 3.0 x 109 kg per cubic meter.
What is the luminosity of Sirius B?
25.4 L☉
Sirius/Luminosity
How big is Betelgeuse?
383.4 million mi (887 R☉)
Betelgeuse/Radius
What type of star is Sirius B?
a1v
Sirius/Spectral type
What is the radius of Sirius compared to Sun?
It has a radius 1.71 times that of the Sun and a surface temperature of 9,940 kelvins (K), which is more than 4,000 K higher than that of the Sun. Its distance from the solar system is 8.6 light-years, only twice the distance of the nearest known star system beyond the Sun, the Alpha Centauri system.
What is Sirius luminosity in terms of solar luminosity?
Sirius A is about twice as massive as the Sun ( M ☉) and has an absolute visual magnitude of +1.42. It is 25 times as luminous as the Sun, but has a significantly lower luminosity than other bright stars such as Canopus or Rigel.
Which star is brighter Sirius or Vega?
The three brightest stars of the sky – Sirius, Canopus and Alpha Centauri – are south of the celestial equator. Meanwhile, Arcturus is the brightest star in the northern part of the sky. It is only marginally brighter than the Northern Hemisphere’s second-brightest star, Vega.
What is the difference between Sirius A and Sirius B?
The two stars revolve around each other every 50 years. Sirius A, only 8.6 light-years from Earth, is the fifth closest star system known. Sirius B, a white dwarf, is very faint because of its tiny size, only 12,000 kilometres in diameter. Sirius B is about 10,000 times fainter than Sirius A.
What is the diameter of VY Canis Majoris?
1.2277 billion mi
VY Canis Majoris/Diameter