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public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 5:19 
Transit: 12:55 
Sunset: 20:32
sunny   (Daytime)   What's Visible Now?

ι1 Librae (iota1 Librae)

Altitude: -56.7°   Azimuth: 337.2°   Direction: North-North-West

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

ι1 Librae visual magnitude is 4.54. Because of its moderate brightness, ι1 Librae should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of ι1 Librae is -0.036 arcsec per year in Right Ascension and -0.039 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

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);

Key facts about ι1 Librae

4.54
Hypergiant

ι1 Librae (iota1 Librae) is below the horizon from Greenwich, United Kingdom.

Altitude: -56.7°
Azimuth: 337.2°
Direction: North-North-West

Celestial coordinates and finder chart of ι1 Librae

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. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ι1 Librae are provided in the following table:

15h 12m 13s
-19° 47’ 30”
342.69°
32°
Libra

The simplified sky map below shows the position of ι1 Librae in the sky:

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

Visibility of ι1 Librae from your location

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

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

Azimuth: 109.8°
Max altitude: 18.7°
Azimuth: 250.2°

Distance of ι1 Librae from the Sun and relative movement

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/year
-0.039 arcsec/year

Spectral properties of ι1 Librae

ι1 Librae belongs to spectral class A0 ι1 Librae is also a Si chemically peculiar star.

-0.77
A0
11247K

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

ι1 Librae 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:

4.54
5.14
0.6
0.1 arcsec

Alternative designations of ι1 Librae

ι1 Librae
(iota1 Librae)
SAO159090
SAO159090