Circinus (Pronounciation:Sir-sin-us, Abbrev:Cir, Latin:Circini) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Circinus takes up 93.353 sq. degrees of the night sky which equates to 0.23% of the night sky. The constellation gets its name as it name means The Compasses . It was not one of the original constellations that had been devised by Ptolemy, instead it was created by AbbÃ© Nicolas Louis de Lacaille years later.
Circinus is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Circinus is a southern hemispheric constellation which means it can't be seen easily or at all from the northern hemisphere.
The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Circinus is 457. The number of stars that are of magnitude 6.0 or lower in the constellation is 21. The number of stars in the constellation that make up the outline is 3.
There are no deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.
The nearest star to Earth is Alpha Circini which is roughly about 54.05 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 134060 which is about 78.94 Light Years. The furthest star that can be located in the constellation is HIP 72967 which is located about 326163 Light Years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.
The dimmest star that can be seen in Circinus with the naked eye is HD 121932. The dim star has an apparent magnitude of 5.96. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan
The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.
There is no Greek Legend behind this constellation. It was created by Abbé Nicolas Louis de Lacaille to fill in the voids in the astronomical charts.There are no major meteor showers that radiate from within this constellation.
|Is a Zodiac Sign||No|
|Brightest Star||Alpha Circini|
|Area||93.353 sq. deg.|
|Percentage of Night Sky||0.23%|
|Site Exoplanet Count||3|
|Meteor Shower Count||1|
|Nearest Star||Alpha Circini|
|Nearest Star with Exoplanet(s)||HD 134060|
|Dimmest Star||HD 121932|
|Furthest Star||HIP 72967|
|Bright Star Count||21|
|Hipparcos Star Count||457|
|Main Star Count||3|
|Messier Deep Space Object Count||0|
|*Non-Messier Deep Space Object Count||0|
|Bordering / Neighbouring / Surrounding Constellations||Lupus|
*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.
The map was generated using Night Vision, an awesome free application by Brian Simpson.
|Star||Distance (Lt. Yrs.)||Exoplanet Count||Declination||Right Ascension|
|HD 129445||213.74||1||-68d 45` 45.4||14h 46m 03.38|
|HD 134060||78.94||2||-61d 25` 20.3||15h 10m 44.97|
As there's so many stars in the cosmos, not all the stars are listed here. The site has lots of stars not listed so if your star isn't listed and you know the Henry Draper or Hipparcos ID, type https://www.universeguide.com/star/ then followed by the HIPNNNNNN or HDNNNN where NNNNN is the number part of the name. The stars that I do list have either a traditional name, a bayer or other classification name.
|Star||Distance (Lt. Yrs.)||Declination||Right Ascension|
|Alpha Circini||54.05||-64d 58` 28.5||14h 42m 30.69|
|AX Circini||1647.29||-63d 48` 35.3||14h 52m 35.27|
|Beta Circini||99.65||-58d 48` 03.2||15h 17m 30.96|
|BP Circini||-61d 27` 43.0||14h 46m 41.99|
|BU Circini||1148.46||-55d 36` 05.8||14h 45m 10.97|
|CO Circini||1405.88||-66d 35` 36.7||14h 48m 44.56|
|Delta Circini||3664.76||-60d 57` 26.1||15h 16m 56.90|
|Epsilon Circini||407.70||-63d 36` 37.8||15h 17m 38.89|
|Eta Circini||275.94||-64d 01` 52.9||15h 04m 48.05|
|Gamma Circini||448.64||-59d 19` 14.5||15h 23m 22.66|
|Theta Circini||1510.02||-62d 46` 51.6||14h 56m 44.00|
|WR 66||644.59||-59d 50` 30.2||15h 14m 57.72|
|WR 70||551.88||+62d 56` 58.0||16h 18m 07.00|
|Zeta Circini||1274.08||-65d 59` 27.8||14h 54m 42.59|
|B||Blue-White 10,500 - 30,000k||127|
|K||Light Orange Star 3,700 - 5,200k||92|
|F||Yellow-White 6,000 - 7,500k||79|
|A||White 7,500 - 10,000k||65|
|G||Yellow 5,200 - 6,000k||59|
|M||Red Dwarf Star <3,700k||11|
|O||Blue Star >33,000k||3|
|Ib||Less Luminous Supergiant||13|
|Iab||Intermediate Luminous Supergiant||1|
|C||C-Type Carbon Star||1|