Star · A1IV
φ Aql
φ Aql is a subgiant star of spectral type A1IV in the constellation Aquila, 221.2 light-years from the Sun.
| Other names | HIP 98103 |
|---|---|
| Constellation | Aquila |
| Distance | 221.2 light-years (67.8 pc) |
| Apparent magnitude | magnitude 5.28 |
| Absolute magnitude | magnitude 1.12 |
| Spectral type | A1IV |
| Surface temperature | 9,950 K |
| Luminosity | 41.6 L☉ |
| Radius | 2.17 R☉ |
| Mass | 2.63 M☉ (estimated) |
| Right ascension (J2000) | 19h 56m 14.2s |
| Declination (J2000) | +11° 25′ 25″ |
| Space velocity (relative to the Sun) | 29.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.28). Visible from the whole Northern Hemisphere and south to latitude 79° S. North of latitude 79° 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 1805. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.9 million years.
The Sun seen from there
From a planet around φ Aql, the Sun would look like a star of magnitude 8.99, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 97431 13.7 light-years
- HIP 97550 18.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.