2.24
Apparent Mag154
Distance (ly)K5III
Spectral Type3,930
Temperature (K)Eltanin is the brightest star in Draco. It helped James Bradley discover the aberration of light in 1728, proving Earth orbits the Sun.
Stellar Data
Apparent Magnitude2.24
Absolute Magnitude-1.04
Distance154 light-years
Spectral TypeK5III
Temperature3,930 K
Luminosity471 L☉
Radius48.15 R☉
Mass1.72 M☉
Right Ascension17h 56m 36.4s
Declination+51° 29′ 20.0″
ConstellationDraco
Notable Facts
- Eltanin helped James Bradley discover the aberration of light in 1728
- This discovery proved Earth orbits the Sun
- In about 1.5 million years Eltanin will pass within 28 light-years of the Sun