Tag Archives: Southern

Corona Australis (The southern crown)

Constellation Corona AustralisCorona Australis is a southern constellation that was cataloged by 2nd century astronomer Ptolemy, and remains among the 88 modern constellations. This horseshoe-shaped constellation lies about as far south as, and adjacent to the crook of Scorpius’ tail, and just beneath the teapot asterism of Sagittarius. Because of its far southern location in the celestial sphere, it barely rises above the southern horizon before setting again. Corona Australis reaches its highest nightfall ascension in September.

This constellation provides the foreground stars for a portion of the Milky Way pointing in a direction near the center of our galaxy. The most notable object in this region is the Corona Australis Molecular Cloud, a large and dark molecular cloud with many embedded reflection nebulae. There are many other telescopically interesting objects in this constellation to include star-forming regions with proto-stars, galaxies, and variable stars.
http://en.wikipedia.org/wiki/Corona_Australis

IAU Corona Australis chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.
IAU Corona Australis chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Centaurus (The centaur)

Constellation CentaurusCentaurus is a large, bright southern constellation that is among the 48 constellations cataloged by 2nd century astronomer Ptolemy. Because it is located so far south on the celestial sphere, it rises only partially above the horizon at a 40-degree north location. It reaches its highest nightfall ascension in May. This constellation has the distinction of hosting our nearest stellar neighbor, the Alpha Centauri system. Located just over four light years away, this system consists of three components: Alpha Centauri A, B and C. Alpha Centauri C is also known as Proxima, which is actually the nearest of the three component stars, and the only one that cannot be seen with the unaided eye.
http://en.wikipedia.org/wiki/Centaurus

IAU Centaurus chart, IAU and Sky & Telescope magazine (Rober Sinnott and Rick Fienberg), June 4, 2011.
IAU Centaurus chart, IAU and Sky & Telescope magazine (Rober Sinnott and Rick Fienberg), June 4, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Ara (The altar)

Constellatiion AraAra, the altar, is a southern constellation that is so far south as to never rise above the horizon for viewers at 40-degrees north latitude. It is included in this collection to complete the descriptions of the 48 constellations cataloged by 2nd century astronomer Ptolemy. For those traveling south, to say Florida or farther, look for Ara to reach its highest nightfall ascension in July. It is located just beneath the crook of Scorpius’ tail.
http://en.wikipedia.org/wiki/Ara_(constellation)

IAU Ara chart, IAU and Sky & Telescope magazine (Roger Sonnott & Rick Fienberg), June 4, 2011.
IAU Ara chart, IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), June 4, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Corvus (The raven)

CorvusCorvus is a southern constellation that was cataloged by 2nd century astronomer Ptolemy that remains among the 88 modern constellations. It’s four brightest stars form a distinct quadrilateral asterism that lies beneath Virgo’s back, adjacent to Crater, and above Hydra near its tail. This constellation reaches its highest nightfall ascension in May. Because of its deep southern declination, it sets shortly after setting, and it never rises very far above the horizon.

NGC40384039_largeThere are no Messier objects in Corvus, but there is a very interesting pair of NGC galaxies, the Antennae peculiar galaxy (NGC 4038 and 4039).  These two objects are undergoing a galactic collision which is stretching them out into unusual antenna-like shapes. “Peculiar” is a term given to any galaxy that does not have the usual spiral or elliptical shape.
http://en.wikipedia.org/wiki/Corvus_(constellation)

IAU Corvus chart, IAU and Sky & Telescope magazine (Roger Sinnertt and Rick Fienberg), June 5, 2011.
IAU Corvus chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Lupus (The wolf)

Constellation LupusLupus, the wolf, is one of the 48 constellations cataloged by 2nd century astronomer Ptolemy that remain among the 88 modern constellations defined by the International Astronomical Union. It is a southern constellation that is so far south that it barely peeks above the horizon in June and July for viewers at 40-degree north locations. It is situated beneath the scales of Libra, and to the right of Scorpius. There are no Messier objects in Lupus, and the several NGC objects located there are difficult for northern observers because of the constellation’s low placement on the horizon.
http://en.wikipedia.org/wiki/Lupus_(constellation)

IAU Lupus chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011..
IAU Lupus chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011..

© James R. Johnson, 2014.
jim@jrjohnson.net

Scutum (The shield)

Scutum, SagittariusOriginally named Scutum Sobiescianum (Shield of Sobieski) to commemorate the victory of Christian forces led by Polish King John III Sobieski in the Battle of Vienna in 1683, the name was later shortened to Scutum. This is a small, dim constellation located between the tail of Aquila, above the head of Sagittarius, and to the left of Ophiuchus. Scutum reaches its highest nightfall ascension in August. It contains two Messier star clusters, M11 (the Wild Duck Cluster), and M26 (NGC 6694).
http://en.wikipedia.org/wiki/Scutum

609px-Scutum_IAU.svg
IAU Scutum chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

 

© James R. Johnson, 2014.
jim@jrjohnson.net

Hydra (The water snake)

Hydra, SextansHydra is the largest of the 88 modern constellations, and was one of the 48 constellations cataloged by 2nd century astronomer Ptolemy. Hydra’s head lies at a point about halfway between Procyon in Canis Minor and Regulus in Leo. From there, it snakes (pun intended) south and eastward below Leo and Virgo, sharing two stars with Crater along the way, before ending just below the right scale of Libra. Hydra’s head reaches its highest nightfall ascension in March, but the tail does not reach that point until three months later in June. The best over all view of Hydra is in late April. Hydra is home to three Messier objects: M83 (the Southern Pinwheel Galaxy), M68 (a globular star cluster), and M48 (an open star cluster).
http://en.wikipedia.org/wiki/Hydra_(constellation)

IAU Hydra chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.
IAU Hydra chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Crater (The cup)

CraterCrater is Latin for cup, and this constellation represents the cup of Apollo in Greek mythology. This is one of the 48 constellations identified by the 2nd century astronomer Ptolemy. It is located below Leo’s feet, and behind Virgo’s back in the southern sky, sharing two stars with the constellation Hydra. This constellation reaches its highest nightfall ascension in April. Aside from a handful of NGC objects that are a challenge for amateur astronomers, there is not much to see in this constellation.
http://en.wikipedia.org/wiki/Crater_(constellation)

IAU Crater chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.
IAU Crater chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Pyxis (The mariner’s compass)

Pyxis is a small, dim southern constellation. Locate it by following Canis Major’s tail away from the dog’s body and through and just to the other side of Puppis. This constellation’s deep southern placement makes it difficult to see at all. It reaches its highest nightfall ascension in March. Although the Milky Way runs through this constellation, there are few deep space objects available to the amateur astronomer’s telescope.
http://en.wikipedia.org/wiki/Pyxis

IAU Pyxis chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.
IAU Pyxis chart, IAU and Sky & Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net

Colomba (The dove)

Monoceros, Puppis, ColumbaColomba was originally named Colmba Noachi, latin for Noah’s Dove. This is a small, dim southern constellation located below the feet of Canis Major. It is so far south that it is only visible at nightfall for a few months centered on February, when it reaches its highest nightfall ascension. In addition to being visually uninteresting due to its small size, dimness, and far south placement, it is also telescopically uninteresting as well. Only one unremarkable globular star cluster (NGC 1851) can be found there with medium-sized amateur telescopes.
http://en.wikipedia.org/wiki/Columba_(constellation)

IAU Columba chart, IAU and Sky Telescope magazine, June 5, 2011.
IAU Columba chart, IAU and Sky Telescope magazine (Roger Sinnott and Rick Fienberg), June 5, 2011.

© James R. Johnson, 2014.
jim@jrjohnson.net