OCTANS

| OCTANS Chart | Description | Special Stars |

Constellation Data

  • Name: OCTANS
  • Translation: Octant
  • Abbreviation: Oct
  • Genitive: Octantis
  • Size: 50
  • Regions: Circumpolar, Southern
  • Located Between: Hydrus, Apus, Chameleon
  • RA: -- hours
  • Decl: -85 degrees
  • Season: Anytime



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

Octans the Octant is devoid of bright stars, but three faint stars (not numbered by brightness) make a small triangle. The south celestial pole actually lies within Octans. The nearest easy-to-spot star to the south pole is Beta-Hydri in Hydrus the Little Snake. No brighter star than Achernar (alpha-Eridani) is closer to the south celestial pole, which lies midway between Achernar (Eridanus) and Crux.

[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

Sigma-Octantis, the closest naked-eye star to the south celestial pole. Magnitude: 5.5 (faint). Distance: 121 LY. Declination: -88 degrees 57 minutes 21 seconds. (Is it closer to the south pole than Polaris is to the north pole?)

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

[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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