Orange giant · Aries
Lilii Borea
Also known as: 39 Arietis (39 Ari), HIP 13061
mag 4.5170 light-years
About
Lilii Borea (39 Arietis) is an orange giant of magnitude 4.5 in Aries, about 170 light-years away.
How to find it
- Lilii Borea is in the constellation Aries.
- Best evenings: around mid-December 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 north of 51° S.
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
| Proper name | Lilii Borea |
|---|---|
| Designation | 39 Arietis (39 Ari) |
| Hipparcos number | HIP 13061 |
| Type | Orange giant |
| Spectral type | K1III |
| Colour | Pale orangeB−V colour index 1.11 |
| Magnitude | 4.5The smaller the number, the brighter. |
| Distance | 170 light-yearsThe light you see left it around 1850. |
| Proper motion | 0.19″ per year across the sky |
| Constellation | Aries |
| Right ascension (J2000) | 02h 47m 54.5s |
| Declination (J2000) | +29° 14′ 50″ |
More in Aries
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →