Table of Contents
What is Epsilon Eridani made of?
Observations from NASA’s Spitzer Space Telescope suggest that Epsilon Eridani actually has two asteroid belts and a cloud of exozodiacal dust. The latter is an analogue of the zodiacal dust that occupies the plane of the Solar System.
What type of star is Eridani?
K2V
Epsilon Eridani/Spectral type
What is 40 Eridani B’s luminosity?
0.013 L☉
40 Eridani B/Luminosity
What color is Eridani?
Visual Facts
| Primary Name | Tau4 Eridani | The Sun |
|---|---|---|
| Binary or Multiple Star System | Yes | No (officially) |
| Star Type based on Spectral Type | Giant Star | Main Sequence Star |
| Colour | Red | Yellow (Atmosphere) / White (In Space) |
| Galaxy | Milky Way | Milky Way |
Where is Eridani?
southern hemisphere
Eridanus is the sixth largest constellation in the night sky, occupying an area of 1138 square degrees. It is located in the first quadrant of the southern hemisphere (SQ1) and can be seen at latitudes between +32° and -90°.
Is Epsilon Eridani b habitable?
The planet orbiting Epsilon Eridani has a semimajor axis of 3.3 AU. Thus it is well outside the habitable zone and is very unlikely to have life, even on its eventual moons.
How bright is Eridani b?
40 Eridani
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Right ascension | 04h 15m 16.31963s |
| Declination | −07° 39′ 10.3404″ |
| Apparent magnitude (V) | 4.43 |
| 40 Eridani B |
What kind of star is Beta Eridani?
giant star
β Eridani has a spectral type of A3 III, with the luminosity class III indicating that this is a giant star which has consumed the hydrogen at its core and evolved away from the main sequence. The effective temperature of the outer envelope is about 8,104 K, which gives the star a white hue typical of A-type stars.
What is the luminosity of Eridani?
0.34 L☉
Epsilon Eridani/Luminosity
Does Epsilon Eridani b have a moon?
The object near the bottom is a hypothetical moon. Hatzes et al. Epsilon Eridani b, also known as Ægir, is an exoplanet approximately 10.5 light-years away orbiting the star Epsilon Eridani, in the constellation of Eridanus (the River).
How many planets are in Epsilon Eridani?
two planets
Previous studies indicate that Epsilon Eridani hosts a disk of planetary debris (can take the form of gas and dust as well as small rocky and icy bodies) and two planets, the Jupiter-mass planet Epsilon Eridani b (AEgir) and a low-mass planet candidate called Epsilon Eridani c.
What color is the star Eridani b?
Based on the star’s spectral type of DA , 40 Eridani B’s colour and type is white white dwarf.
What kind of star is Epsilon Eridani B?
Epsilon Eridani b is a gas giant exoplanet that orbits a K-type star. Its mass is 0.78 Jupiters, it takes 7.4 years to complete one orbit of its star, and is 3.5 AU from its star. Its discovery was announced in 2000.
What kind of core does 40 Eridani B have?
They found that the combination of mass and radius of 40 Eridani B would be better explained by a core composed of a combination of magnesium and iron. So our theory of stellar evolution suggested the star had a helium core, while our theory of white dwarf structure indicated a core composed of much heavier elements.
What kind of asteroids are in the Epsilon Eridani system?
In 2016 it was given the alternative name AEgir [ sic ]. The Epsilon Eridani system also includes two belts of rocky asteroids: at about 3 AU and 20 AU from the star.
What kind of absorption lines does Epsilon Eridani have?
Epsilon Eridani’s K-type classification indicates that the spectrum has relatively weak absorption lines from absorption by hydrogen (Balmer lines) but strong lines of neutral atoms and singly ionized calcium (Ca II).