Blue-white subgiant · Musca
α Muscae
Also known as: α Mus, HIP 61585
mag 2.7320 light-years
About
α Muscae is a blue-white subgiant of magnitude 2.7 in Musca, about 320 light-years away.
How to find it
- α Muscae is in the constellation Musca.
- Best evenings: around mid-May 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 11° 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
- EyesEasy, even from town.
- 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 | α Muscae (α Mus) |
|---|---|
| Hipparcos number | HIP 61585 |
| Type | Blue-white subgiant |
| Spectral type | B2IV-V |
| Colour | Blue-whiteB−V colour index −0.18 |
| Magnitude | 2.7The smaller the number, the brighter. |
| Distance | 320 light-yearsThe light you see left it around 1710. |
| Proper motion | 0.042″ per year across the sky |
| Constellation | Musca |
| Right ascension (J2000) | 12h 37m 11.1s |
| Declination (J2000) | −69° 08′ 08″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →