Star · M2II
δ Sge
δ Sge is a bright giant star of spectral type M2II in the constellation Sagitta, 546.6 light-years from the Sun.
| Other names | HIP 97365 |
|---|---|
| Constellation | Sagitta |
| Distance | 546.6 light-years (167.6 pc) |
| Apparent magnitude | magnitude 3.68 |
| Absolute magnitude | magnitude −2.44 |
| Spectral type | M2II |
| Surface temperature | 4,100 K |
| Luminosity | 2,090 L☉ |
| Radius | 90.7 R☉ |
| Mass | 8.07 M☉ (estimated) |
| Right ascension (J2000) | 19h 47m 23.3s |
| Declination (J2000) | +18° 32′ 03″ |
| Space velocity (relative to the Sun) | 6.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.68). Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° 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 1479. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.7 million years.
The Sun seen from there
From a planet around δ Sge, the Sun would look like a star of magnitude 10.95, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.