About Markeb
Description
Kappa Velorum is a blue-white star of spectral type B2IV-V at magnitude 2.50, located roughly 540 light-years from Earth. It is a spectroscopic binary system with an orbital period of about 116 days. With a combined luminosity of several thousand times solar, it is one of the more distant naked-eye stars. Kappa Vel is a member of the False Cross asterism.
Observing Tips
Kappa Vel is a prominent southern-hemisphere star forming part of the False Cross along with Iota Car, Delta Vel, and Epsilon Car. It appears as a bright blue-white star in a rich region of the southern Milky Way. Best observed from January through May. The False Cross is often mistaken for the true Southern Cross, but it is larger and more symmetric.
History
Kappa Vel has no traditional proper name. Like all stars in Vela, it was originally part of the vast constellation Argo Navis (the Ship of the Argonauts), which was subdivided by Nicolas Louis de Lacaille in 1763 into Carina (the Keel), Puppis (the Stern), and Vela (the Sails).
Fun Facts
The False Cross, of which Kappa Vel is a member, has been the bane of navigators for centuries. Many a sailor in the southern seas has confused it with Crux and consequently made navigation errors. The False Cross is about twice the size of the true Southern Cross.
Observe
1Physical Properties
2Position & Identifiers
3How easy to spot?
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Easy | Easy | Easy |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
5Survey Image
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Explore
7
Size Comparison
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
16
Light Travel Time Machine
17
Relativistic Travel
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.