Measurement of the star's spectrum show it to match a stellar classification of G1.5V,[3] which is close to the Sun's spectral class of G2V. In the wavelength range 3,250–8,750 Â, the energy emission of this star is very similar to the Sun, and thus it is considered a solar analog.[9] The luminosity class 'V' means this is a main sequence star that is generating energy through the thermonuclear fusion of hydrogen at its core. The effective temperature of the outer envelope of HD 44594 is 5,840 K,[6] which is giving it the characteristic yellow hue of a G-type star.[10]
This star has about 108%[5] of the Sun's mass and is about the same radius as the Sun.[1] It may be slightly younger than the Sun with an estimated age of 4.1 billion years.[5] the abundance of elements other than hydrogen or helium, what astronomers term the star's metallicity, is 41% higher than in the Sun.[11] The projected rotational velocity of the star is 4.4 km/s,[7] which gives the minimum azimuthal velocity along the star's equator.
^Hardorp, J.; Tueg, H.; Schmidt-Kaler, T. (March 1982), "The sun among the stars. VI – The solar analog HD 44594", Astronomy and Astrophysics, 107 (2): 311–312, Bibcode:1982A&A...107..311H
^"The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-01-16
^For a metallicity of [Fe/H] = +0.15 dex, the proportion of heavier elements relative to the abundance in the Sun is given by:
