Star · A3V
φ Gem
φ Gem is a main-sequence star of spectral type A3V in the constellation Gemini, 180.8 light-years from the Sun.
| Other names | HIP 38538 |
|---|---|
| Constellation | Gemini |
| Distance | 180.8 light-years (55.4 pc) |
| Apparent magnitude | magnitude 4.97 |
| Absolute magnitude | magnitude 1.25 |
| Spectral type | A3V |
| Surface temperature | 9,050 K |
| Luminosity | 32.3 L☉ |
| Radius | 2.31 R☉ |
| Mass | 2.45 M☉ (estimated) |
| Right ascension (J2000) | 7h 53m 29.8s |
| Declination (J2000) | +26° 45′ 57″ |
| Space velocity (relative to the Sun) | 13.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.97). Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1845. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around φ Gem, the Sun would look like a star of magnitude 8.55, in the direction where our sky has the constellation Sagittarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 37971 9.56 light-years
- SDSS J074913.84+314340.0 16.0 light-years
- HIP 39681 17.4 light-years
- 64 Gem 17.8 light-years
- HIP 36509 18.4 light-years
- HIP 38755 19.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.