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public LocationGreenwich, UK
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations » Libra » 

ι1 Librae (iota1 Librae)

Below the horizon.  Rise: 16:10 | Tran: 20:21 | Set: 0:31
Alt: -30.29°   Az: 275.82°   Direction: West

ι1 Librae is a variable and multiple hypergiant star of spectral class A0 in the constellation of Libra.

ι1 Librae visual magnitude is 4.54. Because of its moderate brightness, ι1 Librae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

ι1 Librae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of ι1 Librae (iota1 Librae) star
DSS2 image of ι1 Librae. The red arrow shows the motion of ι1 Librae during the next 10000 years (-6.00 arcmin in Right Ascension and -6.50 arcmin in declination);

Celestial Coordinates


15h 13m 37s
-19° 52’ 57”
07h 36m 02s
22h 49m 40s


15h 12m 13s
-19° 47’ 30”

Galactic Coordinates


Finder Chart

Finder chart ι1 Librae (iota1 Librae) star
Simplified finder chart for ι1 Librae (iota1 Librae).

Magnitude, Color, Spectral Class

ι1 Librae is also a Si chemically peculiar star.


The red dot in the diagram below shows where ι1 Librae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ι1 Librae. Attribution: Richard Powell / CC BY-SA

Star System Properties

ι1 Librae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the ι1 Librae double sysyem:

0.1 arcsec

Distance, Radial Speed, Proper Motion

ι1 Librae is distant 376.44 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

115.47 pc
376.44 ly
-12 km/s
-0.036 arcsec/y
-0.039 "/y

Alternative Designations

ι1 Librae
(iota1 Librae)

Visibility from Your Location

Today's ι1 Librae (iota1 Librae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.9°
Max altitude: 18.6°
Azimuth: 250.1°