What constellation is Achernar apart of?
constellation Eridanus
Achernar and the constellation Eridanus (Image credit: University of Illinois.) Achernar is a bright, binary star system in the constellation Eridanus, and is the ninth-brightest star in Earth’s night sky.
What galaxy is Achernar in?
The separation of the two stars is roughly 12.3 AU and their orbital period is at least 14–15 years. As of 2003, Achernar is the least spherical star in the Milky Way studied to date. It spins so rapidly that it has assumed the shape of an oblate spheroid with an equatorial diameter 56% greater than its polar diameter.
Where is the star Achernar located?
RA 1h 37m 43s | Dec -57° 14′ 12″
Achernar/Coordinates
What class of star is Achernar?
B6 Vep
Achernar/Spectral type
Achernar is a blue main-sequence star with a stellar classification of B6 Vep. It is a spectral type B star. Achernar is the brightest star in the constellation of Eridanus and the ninth brightest star in the night sky. Out of the ten brightest stars in the sky, Achernar is the hottest and bluest in color.
Is achernar a white dwarf?
Although Achernar is a massive star, it is still young enough to be fusing hydrogen into helium in its core and may be small enough to evolve off the sequence as a massive white dwarf like Sirius B….Achernar.
| Star System | Spectra & Luminosity | Distance (light-years) |
|---|---|---|
| CD-51 311 | F5 V | 19 |
Is Pollux the North star?
Pollux is 6.7 degrees north of the ecliptic, presently too far north to be occulted by the moon and planets. Once an A-type main-sequence star, Pollux has exhausted the hydrogen at its core and evolved into a giant star with a stellar classification of K0 III.
Is Achernar a white dwarf?
Why is Achernar flat?
Due to its daily rotation, the solid Earth is slightly flattened (“oblate”) – its equatorial radius is some 21 km (0.3%) larger than the polar one. They find that Achernar is much flatter than expected – its equatorial radius is more than 50% larger than the polar one!