Yellow-white main-sequence star · Pegasus
ι Pegasi
Also known as: ι Peg, HIP 109176
mag 3.838 light-years
About
ι Pegasi is a yellow-white main-sequence star of magnitude 3.8 in Pegasus, about 38 light-years away.
How to find it
- ι Pegasi is in the constellation Pegasus.
- Best evenings: around early October 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 55° 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
- EyesVisible from the suburbs on a clear night, but lost in bright city skies.
- 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 | ι Pegasi (ι Peg) |
|---|---|
| Hipparcos number | HIP 109176 |
| Type | Yellow-white main-sequence star |
| Spectral type | F5V |
| Colour | Yellowish whiteB−V colour index 0.43 |
| Magnitude | 3.8The smaller the number, the brighter. |
| Distance | 38 light-yearsThe light you see left it around 1988. |
| Proper motion | 0.30″ per year across the sky |
| Constellation | Pegasus |
| Right ascension (J2000) | 22h 07m 00.6s |
| Declination (J2000) | +25° 20′ 42″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →