Star · M4III
13 Sge
13 Sge is a giant star of spectral type M4III in the constellation Sagitta, 952.6 light-years from the Sun.
| Other names | HIP 98438 |
|---|---|
| Constellation | Sagitta |
| Distance | 952.6 light-years (292.1 pc) |
| Apparent magnitude | magnitude 5.33 |
| Absolute magnitude | magnitude −2.00 |
| Spectral type | M4III |
| Surface temperature | 3,680 K |
| Luminosity | 2,310 L☉ |
| Radius | 118 R☉ |
| Mass | 8.31 M☉ (estimated) |
| Right ascension (J2000) | 20h 00m 03.3s |
| Declination (J2000) | +17° 30′ 59″ |
| Space velocity (relative to the Sun) | 25.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.33). Visible from the whole Northern Hemisphere and south to latitude 72° S. North of latitude 72° 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 1073. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 17 million years.
The Sun seen from there
From a planet around 13 Sge, the Sun would look like a star of magnitude 12.16, 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.