Category

Sextans

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Sextans is a faint, minor constellation on the celestial equator which was introduced in 1687 by Polish astronomer Johannes Hevelius. Its name is Latin for the astronomical sextant, an instrument that Hevelius made frequent use of in his observations.

Lenticular galaxy in the constellation Sextans

spiral galaxy in the constellation Sextans

low-surface-brightness galaxy

star in the constellation Sextans

Alpha Sextantis

star in the constellation Sextans

HD1 is a proposed high-redshift galaxy, which is considered (as of April 2022) to be one of the earliest and most distant known galaxies yet identified in the observable universe. The galaxy, with an estimated redshift of approximately z = 13.27, is seen as it was about 324 million years after the Big Bang, which was according to scientists around 13.787 billion years ago.

Cosmos Redshift 7

Sextans Dwarf Spheroidal

list of stars in Sextans

Wikimedia list article

star in the constellation Sextans

Baby Boom Galaxy

brightest starburst galaxy in the very distant universe

MoM-z14 is the most distant known galaxy, with a redshift of z = 14.44. The galaxy was first imaged on 16 May 2025 by the NIRcam instrument aboard the James Webb Space Telescope (JWST). That image captured the galaxy during its formation about 280 million years after the Big Bang, during the Reionization Era of the early universe. This was the stage of cosmic evolution when neutral hydrogen began once again to ionize due to energy radiated by the earliest celestial objects.

Hyperion proto-supercluster

star in the constellation Sextans

WASP-43b, formally named Astrolábos, is a transiting planet in orbit around the young, active, and low-mass star WASP-43 in the constellation Sextans. The planet is a hot Jupiter with a mass twice that of Jupiter, but with a roughly equal radius. WASP-43b was flagged as a candidate by the SuperWASP program, before they conducted follow-ups using instruments at La Silla Observatory in Chile, which confirmed its existence and provided orbital and physical characteristics. The planet's discovery was published on April 14, 2011.

star in the constellation Sextans

Gamma Sextantis

star in the constellation Sextans

extrasolar planet

extrasolar planet

star in the constellation Sextans

WASP-43, also named Gnomon, is a K-type star about away in the Sextans constellation. It is about half the size of the Sun, and has approximately half the mass. WASP-43 has one known planet in orbit, a hot Jupiter called WASP-43b. At the time of publishing of WASP-43b's discovery on April 15, 2011, the planet was the most closely orbiting hot Jupiter discovered. The small orbit of WASP-43b is thought to be caused by WASP-43's unusually low mass. WASP-43 was first observed between January and May 2009 by the SuperWASP project, and was found to be cooler and slightly richer in metals than the Su

KELT-11b is an exoplanet orbiting around the yellow subgiant star KELT-11 (HD 93396) about 320 light-years away from Earth. It is an inflated planet, one of the "puffiest planets" (lowest-density) known, as a result of its close orbiting distance with its parent star. It has a radius 1.37 times that of Jupiter, but only 19% of its mass. It was discovered in 2016.

extrasolar planet

BD−08°2823 is a star with a pair of exoplanetary companions in the faint equatorial constellation of Sextans. The star has an apparent visual magnitude of 9.86, which is too faint to be visible with the naked eye. This system is located at a distance of 135 light-years from the Sun based on parallax measurements, and is trending further away with a radial velocity of +53 km/s. It is a high proper motion star that is traversing the celestial sphere at the angular rate of  yr−1.

CID-42 (also known as CXOC J100043.1+020637) is a galaxy quasar about 3.9 billion light years away in the constellation Sextans. It is believed to have a supermassive black hole at its center.

Delta Sextantis

star in the constellation Sextans

LAE J095950.99+021219.1

star in the constellation Sextans

Epsilon Sextantis

star in the constellation Sextans

variable star in the constellation Sextans

star in the constellation Sextans

extrasolar planet

PSR J0952–0607

massive millisecond pulsar in the Milky Way

TOI-561 is an old, metal-poor, Sun-like star, known to have multiple small planets. It is an orange dwarf, estimated to be 10.5 billion years old, and about 79% the mass and 85% the radius of the Sun. It is located in the constellation Sextans, near the border with Leo.

grand-design spiral galaxy