What is the luminosity of Megrez?
14 L☉Delta Ursae Majoris / Luminosity
What is the luminosity of Alkaid?
1,350 L☉Eta Ursae Majoris / Luminosity
How many light years away is Megrez?
58.41 light yearsDelta Ursae Majoris / Distance to Earth
Is Megrez a main sequence star?
Megrez is a Main Sequence Star. Megrez is the traditional/proper name for the star whilst Delta Ursae Majoris is the Bayer classification for the star. Normally, the brightest star in the constellation is classified as Alpha. Megrez is a main star in the constellation Ursa Major and makes up the constellation outline.
What type of star is Megrez?
A3VDelta Ursae Majoris / Spectral type
Megrez has the stellar classification A3V, indicating a hydrogen-fusing dwarf still on the main sequence, appearing white or blue-white in colour. With 1.4 solar radii, it is slightly larger than the Sun and has a mass 1.63 times solar.
Is Megrez a binary star?
Modern telescopes have found that Mizar is itself a pair of binaries, revealing what was once thought of as a single star to be four stars orbiting each other. Alcor and its newly identified companion, Alcor B, are apparently gravitationally bound to the Mizar system, making the whole group a sextuplet.
Is Alkaid a double star?
Alkaid, Eta Ursae Majoris (η UMa) is a blue main sequence star with an apparent magnitude of 1.86, located at a distance of 103.9 light years from Earth. It is the easternmost star of the Big Dipper….Alkaid – Eta Ursae Majoris.
| Spectral class | B3 V |
|---|---|
| Luminosity | 594 ± 31 L☉ |
| Radius | 3.4 R☉ |
| Temperature | 15,540 ± 1,157 K |
| Age | 10.0 ± 2.6 million years |
Which star is Alkaid?
Eta Ursae Majoris
Alkaid is a blue main-sequence star of spectral type B3 V, located at around 103.9 light-years / 31.9 parsecs away from the Sun. Alkaid, also known as Eta Ursae Majoris, is the third brightest star in the constellation of Ursa Major, the celestial Great Bear.
What color star is Megrez?
blue-white
What is the temperature of Megrez?
8630 Kelvin
Megrez is also a straightforward star. Shining toward the fainter end of third magnitude (3.31), this rather ordinary class A (A3) hydrogen-fusing dwarf glows whitely with a temperature of 8630 Kelvin, about half again hotter than our Sun.
Is Alkaid a binary star?
Physics & Astronomy The two stars, Alcor and Mizar, were the first binary stars— a pair of stars that orbit each other—ever known. Now Rochester astronomer Eric Mamajek has discovered that Alcor, one of the most studied stars in the sky, is actually two stars.
Which star is Dubhe?
α Ursae Majoris
Dubhe, also designated as α Ursae Majoris (alpha Ursae Majoris), is a variable and double hypergiant star in the constellation of Ursa Major. Dubhe visual magnitude is 1.79, making it the 33th brightest star in the sky.