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Gamma Microscopii (γ Microscopii, γ Mic) is the brightest star in the faint southern constellation of Microscopium.It has an apparent visual magnitude of 4.68, which is too dim to be viewed from city skies. The distance to this star has been determined using parallax measurements made with the Gaia telescope, which place it at 223 ± 8 light-years (68.4 ± 2.5 parsecs).

Based upon a stellar classification of G6 III,this is a G-type giant star. It is a core helium fusing star that is classified as a member of the red clump evolutionary branch, although the metallicity of this star—meaning the abundance of elements other than hydrogen and helium—is anomalously low for a member of this group. The effective temperature of the star's outer envelope is 5,050 K, giving it the yellow-hued glow typical of G-type stars.

Gamma Microscopii ΓMic

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The night of Space Calabrÿa

The night of Space Calabrÿa - Space Calabrÿa

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It bore the traditional name Sadalsuud, from an Arabic expression سعد السعود (sa‘d al-su‘ūd), the "luck of lucks". Other spellings that were sometimes encountered were Sad es Saud, Sadalsund, and Saad el Sund. In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Nir Saad al Saaoud, which was translated into Latin as Lucida Fortunæ Fortunarum (rather identic with R.H. Allen), meaning the brightest of luck of lucks. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN approved the name Sadalsuud for the primary or 'A' component on 21 August 2016, and it is now so included in the List of IAU-approved Star Names.

In Chinese, 虚宿 (Xū Sù), meaning Emptiness (asterism), refers to an asterism consisting of Beta Aquarii and Alpha Equulei. Consequently, the Chinese name for Beta Aquarii itself is 虛宿一 (Xū Sù yī, English: the First Star of Emptiness).

Sadalsuud is found in Hindu texts as Kalpeny and, in the context of the ancient Indian system of astronomy, Jyotisha Veda, is located in the 23rd Nakshatra Shravishthā, a lunar mansion which is ruled by Eight vasus - the "deities of earthly abundance" . On the Euphrates, Sadalsuud was known as Kakkab Nammax, the Star of Mighty Destiny; that may have given origin to the title of the manzil, as well as to the astrologers' name for it — Fortuna Fortunarum.

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-Sadalsuud AQAR - Space Calabrÿa

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ν Octantis, Latinised as Nu Octantis. is a spectroscopic binary star in the constellation Octans with a period around 2.9 years. Its apparent magnitude is 3.73. Located around 21.20 parsecs (69.1 ly) distant, the primary is an orange giant of spectral type K1III, a star that has used up its core hydrogen and has expanded. The secondary star is likely a red dwarf from its low mass.

In 2009, the system was hypothesized to contain an exoplanet based on perturbations in the orbital period. A prograde solution was quickly ruled out but a retrograde solution remains a possibility, although the variations may instead be due to the secondary star being itself a close binary, since the formation of a planet in such a system would difficult due to dynamic perturbations.