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Crux (The Southern Cross)

Crux (pronounced ˈkrʌks) is the Latin name of a constellation situated south of the celestial equator. As such, it is more easily visible from the southern hemisphere.

In English language this constellation is also known as "The Southern cross" while in astronomical texts and literature this constellation is often abbreviated as "Cru" (according to the standard of the International Astronomical Union - IAU) or as "Cruc" (according to a naming convention used by NASA).

The Latin genitive of the constellation name is "Crucis" (pronounced ˈkruːsɪs) and it is used to identify some of the brightest stars in this constellation based on the Bayer or Flamsteed star naming convention. For instance: α Crucis (the brightest star of Crux based on the Bayer catalog); or 23 Crucis (the 23th star in the constellation of Crux based on the Flamsteed catalog).

Crux is below the horizon from Greenwich, United Kingdom [change].
Available Resources for Crux

Sky chart of Crux from your location

Here we provide a simplified sky chart of the Crux constellation. Alternatively it is possible to locate Crux in the night sky using our Online Interactive Planetarium.

Chart of  constellation
This constellation image is derivatve work based on original work by IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) CC-BY-3.0.

Visibility of Crux from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Crux is currently not visible from Greenwich, United Kingdom [change]

The rise and set times provided here are just directional indications and they refer to a point approximately placed at the center of the constellation. In case of very large constellations these times can have little relevance.

Top bright stars in Crux

The table below lists the top 20 brightest stars in the Crux constellation. See also the complete list of 47 stars brighter than magnitude 6.5 (approximate) in the constellation of Crux. Click on each star to see more details about it.

HR Number(*) Star designation Proper name Visual magnitude Color Notes
HR4853 β Crucis Mimosa 1.25 Variable; Multiple;
HR4730 α1 Crucis Acrux 1.33 Multiple;
HR4763 γ Crucis Gacrux 1.63 Variable; Multiple;
HR4656 δ Crucis Imai 2.8 Variable;
HR4700 ε Crucis Ginan 3.59 Variable;
HR4898 μ1 Crucis 4.03 Double;
HR4679 ζ Crucis 4.04 Double;
HR4616 η Crucis 4.15 Double;
HR4599 θ1 Crucis 4.33 Double;
HR4897 λ Crucis 4.62 Variable;
HR4848 4.65 Double;
HR4842 ι Crucis 4.69 Double;
HR4603 θ2 Crucis 4.72 Variable;
HR4729 4.86 Multiple;
HR4823 4.93 Variable;
HR4899 μ2 Crucis 5.17 Variable; Double;
HR4830 5.31 Variable;
HR4908 5.32 Variable; Double;
HR4706 5.39 Variable;
HR4576 5.44 Variable;
...go to the complete list of 47 bright stars in the constellation of Crux

(*) HR stands for Harvard Revised Bright Star Catalogue, which is also known as the Yale Catalogue of Bright Stars.

Top deep sky objects in Crux

The table below lists all the deep sky objects in the Crux constellation. See also the complete list of 10 deep sky objects in the constellation of Crux. The list includes objects from the Messier, New General Catalogue (NGC) and Index Catalogue (IC).

Name Type Magnitude
NGC 4609 (Coalsack Cluster) Open Cluster 6.9 (V)
H05 Open Cluster 7.1 (V)
NGC 4349 Open Cluster 7.4 (V)
NGC 4103 Open Cluster 7.4 (V)
NGC 4439 Open Cluster 8.4 (V)
NGC 4052 Open Cluster 8.8 (V)
NGC 4337 Open Cluster 8.9 (V)
C099 (Coalsack Nebula) Dark Nebula N/A
NGC 4184 Open Cluster N/A
NGC 4755 (Herschel's Jewel Box) Open Cluster N/A