Iota Draconis is a giant of the spectral type K2 III, approximately 101.2 light years distant from Earth. And it's not hard to find either as, if you curve north a bit, fairly bright Eltanin and Rastaban (Gamma and Beta Dra) point westerly at it. As the North Star, Thuban was preceded by Edasich (Iota Draconis, mag. It is 21 percent more massive than the Sun, has 2.5 times the radius, and is 8.7 times more luminous. It has a visual magnitude of 4.1190.
... Iota Draconis, Iot Dra, HD 137759, HIP 75458, HR 5744, 12 Draconis, 12 Dra, BD+59 1654: Spectral Type: Edasich eller Jota Draconis (ι Draconis, förkortat Jota Dra, ι Dra), som är stjärnans Bayer-beteckning, är en stjärna i sydvästra delen av stjärnbilden Draken.Den har en skenbar magnitud på +3,29,  och är synlig för blotta ögat där ljusföroreningar ej förekommer. It has a visual magnitude of 3.290. Though at fifth magnitude (4.92) often left out of star charts, from old-time lore Arrakis still serves a role in the constellation Draco as the tip of the Dragon's tongue. In late 2001, the California Planet Research Teamestimated that it is about 98 ly or 30 parsecs away (exoplanets.org).
Physical Properties of Theta Draconis Theta Draconis Colour and Temperature . Though at fifth magnitude (4.92) often left out of star charts, from old-time lore Arrakis still serves a role in the constellation Draco as the tip of the Dragon's tongue. Emeritus of Astronomy, University of Illinois Learn about stellar spectra in STARS AND THEIR SPECTRA: An Introduction to the Spectral Sequence, Second Ed., with two new chapters and 140 new illustrations, Cambridge University Press (UK or North America), 2011. Thuban (Alpha Draconis) is the fourth brightest star in the constellation Draco.Thuban used to be the pole star, a distinction it held from 3942 BC to 1793 BC when it was superceded by the faint star Kappa Draconis.In 2787 BC, it lay just 1/180 the width of the full Moon from the pole. System Summary. Theta Draconis is a yellow-white main sequence star of the spectral type F9 V, approximately 68.6 light years away. A thorough spectral analysis of this star was undertaken by Sadakane et al.
The star's effective temperature is 4,642 Kelvin which is cooler than our own Sun's effective Temperature which is 5,777 Kelvin Theta Draconis Luminosity This was the first planet discovered to orbit a giant star. The planet orbiting iota Draconis (hereafter ι Dra) presents a particularly interesting case. It is a K2III yellow/orange giant, with a magnitude of 3.29, just over 100 light years away. The search radius has to be specified by the user. Also known as Beta Draconis, despite having a luminosity around 1,00 times greater than that of the sun Rastaban is only the third brightest star in the constellation relative to how we view it on Earth, it is a yellow giant around 380 light years from Earth, it has a mass 6 times greater than the sun and is around 40 times larger in diameter. Its mass is little more than that of our sun (1.05 solar masses); therefore, it is probably quite similar to what our sun will look like in its "red giant" phase, in a couple of billion years.
Edasich (Iota Draconis, 12 Draconis) Star Facts. Edasich / Iota Draconis Andrea Dupree, Ronald Gilliland, NASA and ESA (Larger ultraviolet image -- more).. Edasich - ι Draconis (Iota Draconis) Iota Draconis is a giant of the spectral type K2 III, approximately 101.2 light years distant from Earth.It has a visual magnitude of 3.290. ARRAKIS (Mu Draconis). ARRAKIS (Mu Draconis).
And it's not hard to find either as, if you curve north a bit, fairly bright Eltanin and Rastaban (Gamma and Beta Dra) point westerly at it. ... Edasich Luminosity. Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. Edasich (12 Iota Draconis) is an orange giant of spectral type K2 III in the constellation Draco. 3.82). VizieR photometry viewer within radius arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. 3.29) and succeeded by the brighter Kochab (Beta Ursae Minoris, mag.
The star has a planet in its orbit, which was discovered in 2002. Edasich, or Iota Draconis, is a third magnitude star located around 100 light-years (ly) from Sol.