Sextans, a southern hemisphere constellation, is best viewed with a telescope. This faint group of stars is located near the celestial equator, making it accessible from both northern and southern latitudes.
Its area covers 314 square degrees and it lies in the second quadrant of the southern hemisphere, visible between +80° and -90° latitudes.
Using a small telescope or binoculars will significantly enhance your viewing experience. The constellation is home to several intriguing deep sky objects, such as the Sextans A and Sextans B galaxies.
While the stars of Sextans might not be bright to the naked eye, they reveal their splendor through magnification.
Sextans was introduced by Polish astronomer Johannes Hevelius in 1687. One of its notable stars is Alpha Sextantis, a white giant situated 287 light years from Earth.
Observing Sextans with a telescope will offer you a fascinating look at one of the sky’s lesser-known yet richly intriguing constellations.
The History of Celestial Observation for Sextans
Celestial observation has a rich history that dates back centuries, involving advancements in telescopes and techniques.
One key figure in this history is the Polish astronomer Johannes Hevelius, who made significant contributions through his observations and instruments like the astronomical sextant.
Polish Astronomer Johannes Hevelius
Johannes Hevelius, a renowned Polish astronomer, created the Sextans constellation in 1687.
Sextans, which spans an area of 314 square degrees, is located in the second quadrant of the southern hemisphere (SQ2) and can be seen at latitudes between +80° and -90°.
Hevelius used an astronomical sextant for his observations, an instrument that helps in measuring the angular distances between stars.
With his telescopic advancements, he mapped numerous celestial bodies along the celestial equator with precision, noting their right ascension and declination.
His contributions were so significant that the International Astronomical Union recognizes his work by keeping the constellation Sextans in modern usage.
Guide to the Constellation Sextans
Sextans is a faint constellation located near the celestial equator, making it visible from most of the Earth. It contains interesting features and deep sky objects despite its dim stars.
Key Features of Sextans
Sextans occupies an area of 314 square degrees, making it the 47th largest constellation.
It is positioned in the second quadrant of the southern hemisphere (SQ2) and can be seen at latitudes between +80° and -90°.
The constellation was created by Johannes Hevelius in 1687. Its name means “the Sextant,” a navigational instrument.
Sextans is an equatorial constellation, bordered by Leo to the north, Hydra to the southwest, and Crater to the southeast. The brightest star, Alpha Sextantis, is a white giant located 287 light years from Earth with a magnitude of +4.49.
Sextans is best viewed during the month of April.
Deep Sky Objects in Sextans
Sextans hosts some notable deep sky objects. Sextans A and Sextans B are two dwarf galaxies within the constellation.
NGC 3115, also known as the Spindle Galaxy, is another interesting object. It is a lenticular galaxy and one of the closest examples of its kind.
The constellation also contains NGC 3166 and NGC 3169, which are spiral galaxies that form an interacting pair.
Another feature is CL J1001+0220, a galaxy cluster observed by the Hubble Space Telescope.
This variety of objects makes Sextans an appealing target for deep sky observation.
Instruments and Techniques for Observing the Sextans Constellation
When stargazing, having the right instruments and techniques is crucial.
For observing the Sextans constellation, you need specific tools and methods.
Telescope:
A good telescope is essential.
Sextans has dim stars, so a telescope with high light-gathering capability is recommended.
To choose one, consider these top telescopes.
Binoculars:
Binoculars can also help locate key stars and celestial objects in Sextans.
They are easier to handle and provide a wide field of view, useful for beginners.
Sextant:
A sextant, traditionally used for navigation, can help you learn more about the positions of celestial objects.
It’s an interesting tool if you’re keen on understanding the historical aspects of astronomy.
Observatory:
Visiting an observatory gives you access to professional telescopes and guidance.
This is particularly helpful for seeing fainter stars and deep-sky objects in Sextans, especially between latitudes +80° and -80°.
Finding the Celestial Equator:
Sextans is located near the celestial equator.
This makes it easier to find if you start by locating equator stars in your night sky.
Visual Magnitude:
Understand the visual magnitude of stars in Sextans.
Most stars in this constellation are dim, so knowing their brightness helps in identifying them.
Clear, Dark Sky:
Ensure you’re observing from a location with minimal light pollution.
A dark sky offers the best visibility for locating and observing Sextans with a telescope or binoculars.