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Gamma Sextantis, Latinized as γ Sextantis, is a binary star system in the equatorial constellation of Sextans. The combined apparent visual magnitude of the system is 5.05, which means it is faintly visible to the naked eye. The annual parallax shift is 11.75 mas, indicating a distance of around 280 light years.

The two components orbit each other with a period of 77.55 years and a high eccentricity of 0.691. The orbital plane is inclined by 145.1° to the line of sight from the Earth. With a visual magnitude of 5.6, the brighter component A is an A-type main sequence star with a stellar classification of A1 V. The fainter companion B has a classification of A4 V with a magnitude of 6.0. Their combined spectral matches a classification of A0/1 V and their angular separation 0,4 arcseconds, so for the observation a telescope with at least 30 centimetres aperture is require.

There is a magnitude 12.28 companion star C at an angular separation of 36.9 arc seconds along a position angle of 333°, as of 2000. This separation has increased from 30.0 arc seconds in 1834. The proper motion of this star differs from the Gamma Sextantis AB system, having components μ_α = −29 mas/yr and μ_δ = +5 mas/yr.

References

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8. ^ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
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v t e Constellation of Sextans
List of stars in Sextans Sextans in Chinese astronomy
Stars	Bayer α β γ δ ε Flamsteed 3 4 5 6 7 9 12 13 14 16 17 18 19 20 21 23 24 25 26 27 31 32 33 34 35 36 39 40 41 Variable S T Y RW SW VY HR 3879 3901 3907 3915 3959 4000 4034 4059 4060 4085 4092 4109 4122 4224 4233 4240 HD 85461 86081 86341 90057 92788 93396 Other BD−08°2823 FIRST J102347.6+003841 Gliese 382 Gliese 393 LHS 292 PG 1026+002 PG 1047+003 PSR J0952–0607 TOI-561 WASP-43
Exoplanets BD-08°2823 b c HD 86081 b HD 92788 b KELT-11b WASP-43b TOI-561 b
Galaxies	NGC 2974 3044 3110 3115 3156 3169 3341 Other Baby Boom Galaxy CID-42 Cosmos Redshift 7 HD1 LAE J095950.99+021219.1 PGC 29820 REBELS-25 Sextans A Sextans B Sextans Dwarf Spheroidal AT2018hyz
Galaxy clusters CL J1001+0220 Hyperion proto-supercluster
Category

• A-type main-sequence stars
• Binary stars
• Bayer objects
• Sextans
• Durchmusterung objects
• Flamsteed objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects