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40 Eridani B (Companion Star) Facts

40 Eridani B Facts

40 Eridani B's Alternative Names

The Id of the star in the Henry Draper catalogue is HD26976. The Gliese ID of the star is GL 166 B. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Star Names

40 Eridani B has alternative name(s) :- Omicron-02 Eridani B.

More details on objects' alternative names can be found at Star Names .

Location of 40 Eridani B

The location of the dwarf star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For 40 Eridani B, the location is 04h 15m 21.786 and -07° 39` 29.22 .

Radial Velocity and Proper Motion of 40 Eridani B

Proper Motion

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -3,377.10 milliarcseconds/year towards the north and -2,228.30 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -21.00 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour) of 40 Eridani B

40 Eridani B Colour and Temperature

40 Eridani B has a spectral type of DA2.9. This means the star is a white dwarf star.

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Additional 40 Eridani B Facts and Figures

Visual Facts


Primary / Proper / Traditional Name40 Eridani B
Alternative NamesOmicron-02 Eridani B, HD 26976, Gliese 166 B
Spectral TypeDA2.9
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeDwarf Star
ColourWhite
GalaxyMilky Way
ConstellationEridanus
Right Ascension (R.A.)04h 15m 21.786
Declination (Dec.)-07° 39` 29.22
Proper Motion Dec.-3377.10 milliarcseconds/year
Proper Motion RA.-2228.30 milliarcseconds/year
Radial Velocity-21.00 km/s
Associated / Clustered StarsKeid
Omicron-02 Eridani C

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=40%20eridani%20B

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