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The brightest star in the constellation Draco. Its name comes from the Arabic for "the serpent" and stands for the whole constellation. Eltanin's high northerly position takes it nearly through the zenith as seen from London, causing it to be known formerly as the zenith star and to be heavily studied. While attempting to measure its parallax - the annual shift in stellar position caused by the changing position of the orbiting Earth (from which we get stellar distance) - James Bradley, in 1728, discovered the aberration of starlight, which is caused by the velocity of the moving Earth relative to the speed of the light coming from the star. This discovery proved, once and for all, that Copernicus was right and that Earth truly does move around the Sun.

Eltanin is moving toward us, and will make a closest pass of 28 light-years about 1.5 million years from now, when it will be the brightest star in the sky and will rival our current Sirius. Physically, Eltanin is an orange giant K star, a bit over half the size of Mercury's orbit.

visual magnitude

2.24

absolute magnitude

-1.04

spectral type

K5III

surface temperature

4,000K

luminosity

600 Lsun

radius

50 Rsun

mass

1.7 Msun

distance

148 ± 3 light-years (45.2 ± 0.9 pc)

position

R.A. 17h 56m 36.4s,

Dec. +51° 29' 20.3"

other designations

Etamin, Etanin, Ettanin,

Rastaban, Rasaben, 33 Draconis,

HR 6705, BD +51°2282, HD 164058,

SAO 30653, FK5 676, HIP 87833.

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13y ago

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Related Questions

What is the surface temp of the star Eltanin?

The surface temperature of the star Eltanin is approximately 5450 degrees Celsius. It is classified as a K-type giant star and is located around 64 light-years away from Earth in the constellation Draco.


What is the surface temperature in degrees kelvin for the eltanin star for the Draco constellation?

3,930 degrees kelvin. one of the coolest/coldest stars in the constellation


What is the surface tempouture of Draco the constellation?

Draco, the constellation, does not have a specific surface temperature, as it is made up of multiple stars, each with its own temperature. For example, one of its notable stars, Thuban, has a surface temperature of about 6,000 Kelvin, while another, Eltanin, has a temperature around 4,900 Kelvin. The temperatures of stars in Draco vary widely, reflecting their different types and stages of evolution.


Is eltanin an M or O type star?

Neither - Eltanin is a K type star


What color is Eltanin?

Gamma Draconis (Eltanin and Etamin) is a star in the constellation Draco.It is an orange giant of spectral type K5


What type of star is Eltanin?

Eltanin is an orange giant of spectral type K5


What is the magnitude of the star eltanin?

Gamma Draconis (Eltanin) is a star in the constellation Draco.It has an apparent magnitude of +2.24It has an absolute magnitude of -1.04


What letter is eltanin?

This is not a letter. It's not an English word, either. I think you should check your spelling or ask someone what word they said that you thought was spelled "eltanin."


What color is the star eltanin?

It's a giant red star.


What is Saturn's lowest surface temperature?

Surface temperature? Saturn probably doesn't HAVE a "surface".


What is the surface temperature of the Acamar star?

About 7900 degrees Celsius, surface temperature.


What is the brightest star in the Draco constellation?

Gamma Draconis, also known as Etamin or Eltanin.