46 Capricorni is a solitary star located around 780 light years away from the Sun in the southern constellation of Capricornus, near the northern border with Aquarius. It is visible to the naked eye as a dim, yellow-hued point of light with an apparent visual magnitude of +5.10. 46 Cap is also known by its Bayer designation of c Capricorni (c Cap), and occasionally as c1 Capricorni to distinguish it from the nearby star c2 Capricorni. It is moving closer to the Earth with a heliocentric radial velocity of −15.5 km/s.
This star has received a stellar classification of G8Iab, which suggests it is a G-type supergiant star, as well as G7.5II-IIICN0.5, which instead indicates a luminosity class between a giant and a bright giant. Abundance analysis suggests the star has not yet passed the first dredge-up. It has 4.6 times the mass of the Sun and has expanded to 33 times the Sun's radius. The star is radiating 627 times the luminosity of the Sun from its photosphere at an effective temperature of 4,837 K.
Etymology
This star, along with β Aqr (Sadalsuud) and ξ Aqr (Bunda), were Saʽd al Suʽud (سعد السعود), the Luck of Lucks.
References HD 206834, HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index, N. D. Kostjuk, Institute of Astronomy of Russian Academy of Sciences, 2002; CDS ID IV/27A.
β Aqr as Nir Saad al Saaoud or Lucida Fortunæ Fortunarum (the brightest of luck of lucks) and ξ Aqr as Thanih Saad al Saaoud or Secunda Fortunæ Fortunarum (the second of luck of lucks). c Cap should be Thalath Fortunæ Fortunarum or Tertia Fortunæ Fortunarum (the third of luck of lucks) consistently, but Al Achsasi Al Mouakket was not designated the title for this star with uncleared consideration. Possibly according to the differences of opinion with R. H. Allen.