Star · G5V
Helvetios
Helvetios is a main-sequence star of spectral type G5V in the constellation Pegasus, 50.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | 51 Peg · Gl 882 · HIP 113357 |
|---|---|
| Constellation | Pegasus |
| Distance | 50.6 light-years (15.5 pc) |
| Apparent magnitude | magnitude 5.45 |
| Absolute magnitude | magnitude 4.49 |
| Spectral type | G5V |
| Surface temperature | 5,760 K |
| Luminosity | 1.37 L☉ |
| Radius | 1.19 R☉ |
| Mass | 1.07 M☉ |
| Age | 10.0 billion years |
| Metallicity [Fe/H] | 0.21 |
| Right ascension (J2000) | 22h 57m 28.0s |
| Declination (J2000) | +20° 46′ 08″ |
| Space velocity (relative to the Sun) | 36.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.45). Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 898 thousand years.
The Sun seen from there
From a planet around Helvetios, the Sun would look like a star of magnitude 5.79, in the direction where our sky has the constellation Crater. It would be visible to the naked eye.
Planets
- 51 Peg b 4.23-day orbit · 14.1 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4326 5.34 light-years
- GJ 4306 5.34 light-years
- 2MASSW J2244316+204343 5.67 light-years
- GJ 1273 7.93 light-years
- CWISEP J223022.60+254907.5 8.36 light-years
- Gl 872B 8.59 light-years
- ξ Peg 8.65 light-years
- GJ 4341 9.29 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.