DORADO

| DORADO Chart | Midnight Culmination | Description | Special Stars | Galaxies |
| Discussed in these Shows |

Constellation Data

  • Name: DORADO
  • Translation: Swordfish
  • Abbreviation: Dor
  • Genitive: Doradus
  • Size: 72
  • Regions: Southern
  • RA: 5 hours
  • Decl: -60 degrees
  • Season: Summer
  • Midnight Culmination: December 17



What is the Genitive form?
What is Right Ascension (RA)?
Is this constellation ever visible from my latitude? What is Declination?

Where should I look for a constellation on a date before or after its midnight culmination? What is Midnight Culmination?

Description

Dorado the Swordfish is a small and obscure but very interesting constellation. It contains the Large Magellenic Cloud (LMC) and the only recent naked-eye supernova. In addition, the south ecliptic pole is located about where the "eye" of the fish would be. The Large and Small Magellenic Clouds are bright enough to be visible even in Moonlight.

[star chart]


Star chart created with Voyager II Software for Macintosh, published by Carina Software. This is just a taste of what Voyager can do! For info on Voyager II software, call Carina Software at (510) 355-1266, write them at 12919 Alcosta Blvd Suite #7, San Ramon, CA 94583, or visit Carina Software's home page and check out Voyager II for yourself.

Special Stars

On February 23-24 in 1987 the Large Magellenic Cloud was the site of Supernova 1987A. It "went off like a firecracker" and was observed by two astronomers at a remote mountain observatory near Las Campanas, Chile (29 degrees south latitude). Ian Shelton and Oscar Duhalde both observed this new star flare up only 4 degrees from the south ecliptic pole. At maximum intensity three months later the supernova was at magnitude 2.8, about the same brightness as the fourth brightest star of Crux. Then it grew redder, and by the end of the year diminished to the threshold of naked-eye visibility.

Supernova 1987A was the first naked-eye supernova in or near our galaxy since the invention of the telescope. The last two were Kepler's Supernova, which appeared in Ophiuchus in 1604, and Tycho's Star, which appeared in Cassiopeia in 1572. Tycho's Star was visible for 16 months, and at its brightest could be seen in full daylight. The Crab Nebula in Taurus is believed by many to be the result of a supernova in 1054.

Table of 25 Brightest Stars.
What is apparent stellar magnitude?

Galaxies

The Large and Small Magellenic Clouds

The Magellenic clouds are satellite galaxies bubbled off of the Milky Way like spray from a fountain. However, some astronomers consider them galaxies in their own right (the LMC has a degree of spiral structure). These bright regions of light, observed by Ferdinand Magellan in 1519 and by other early explorers like Amerigo Vespucci and Marco Polo, are also known as Cape Clouds.

The LMC (166,000 LY away) lies almost between Canopus and the south pole, or on a line from Sirius through Canopus. The LMC contains the Tarantula Nebula.

The SMC (slightly farther than the LMC) lies almost between Achernar and the south pole in the constellation Tucana the Toucan.

What are Galaxies?
Table of Messier Objects.
What is apparent Magnitude?

Discussed in these Shows

[Small Logo] ©1997 Welcome to the Basic Celestial Phenomena web site. To provide explanations of basic observational astronomy to students, teachers, families, and visitors to planetariums these pages have been written by an ex-OBU Planetarium Director, Kerry Magruder; the OBU Natural Sciences Coordinator, Mike Keas; and some of the students who work in the OBU planetarium.

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