White star · Libra
ι¹ Librae
Also known as: ι¹ Lib, HIP 74392
mag 4.5380 light-years
About
ι¹ Librae is a white star of magnitude 4.5 in Libra, about 380 light-years away.
How to find it
- ι¹ Librae is in the constellation Libra.
- Best evenings: around late June it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
- Where on Earth: it is seen well, at least 10° up, from south of 60° N.
When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.
What you will see
- EyesNeeds a dark sky away from city lights.
- Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
- Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.
Stars look the same in any instrument: brighter and sharper, but never bigger.
Facts
| Designation | ι¹ Librae (ι¹ Lib) |
|---|---|
| Hipparcos number | HIP 74392 |
| Type | White star |
| Spectral type | Asp |
| Colour | WhiteB−V colour index −0.07 |
| Magnitude | 4.5The smaller the number, the brighter. |
| Distance | 380 light-yearsThe light you see left it around 1650. |
| Proper motion | 0.048″ per year across the sky |
| Constellation | Libra |
| Right ascension (J2000) | 15h 12m 13.3s |
| Declination (J2000) | −19° 47′ 30″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →