HR 8526
HR 8526, also known as HD 212168, is the primary of a triple star located in the southern circumpolar constellation Octans. The star and its companion have apparent magnitudes of 6.12 and 9.36 respectively.[2][4] The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements,[3][1] but is receding with a heliocentric radial velocity of 15 km/s.[8][9]
This is a Sun-like star with a stellar classification of G0 V.[5] It has 105% the mass of the Sun[12] and 117% its girth.[13] It radiates 157% the luminosity of the Sun[14] from its photosphere at an effective temperature of 5,935 K,[15] giving it a whitish-yellow hue. HR 8526 has an iron abundance similar to the Sun's[12] and spins modestly with a projected rotational velocity of 3.6 km/s.[16] HD 212168 has a similar age to the Sun; the former is 4.7 billion years old[17] while the latter is 4.6 billion years old.
The B subsystem is located 14″ away along a position angle of 78°.[21] It has a combined mass 76% that of the Sun[18] and take roughly 11 years to orbit each other.[11] Spectral classifications for this star vary from G0-V to K2V.[7][22] The G0 class has been used as an argument that the two visible components form a purely optical pair,[23] but this has been dismissed as mis-identification or contamination and that the actual spectral class is early or mid K.[10]
DENIS J222644.3-750342 is a cool M8 red dwarf[24] located 264 arcseconds away from HR 8526.[21] In 2012, J.A. Caballero identified it as a companion to the AB system, making it a quadruple star system.[10]
References
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