Star · G3
PH2
PH2 is a main-sequence star of spectral type G3 in the constellation Cygnus, 1,122 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 1,122 light-years (343.9 pc) |
| Apparent magnitude | magnitude 12.65 |
| Absolute magnitude | magnitude 4.97 |
| Spectral type | G3 |
| Surface temperature | 5,730 K |
| Luminosity | 0.874 L☉ |
| Radius | 0.949 R☉ |
| Mass | 0.966 M☉ |
| Age | 4.1 billion years |
| Metallicity [Fe/H] | 0.02 |
| Right ascension (J2000) | 19h 19m 03.3s |
| Declination (J2000) | +51° 57′ 46″ |
| Space velocity (relative to the Sun) | 26.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.65. Visible from the whole Northern Hemisphere and south to latitude 38° S. North of latitude 38° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 904. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 20 million years.
The Sun seen from there
From a planet around PH2, the Sun would look like a star of magnitude 12.51, in the direction where our sky has the constellation Carina. It would be invisible to the naked eye.
Planets
- PH2 b 283-day orbit · 9.34 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.