Star · ?
Gl 397.1B
Gl 397.1B is a main-sequence star of spectral type ? in the constellation Ursa Major, 57.2 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 57.2 light-years (17.5 pc) |
| Apparent magnitude | magnitude 16.20 |
| Absolute magnitude | magnitude 14.98 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 3.94 × 10⁻⁴ L☉ |
| Radius | 0.0496 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 31m 30.7s |
| Declination (J2000) | +57° 05′ 17″ |
| Space velocity (relative to the Sun) | 20.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 16.20. Visible from the whole Northern Hemisphere and south to latitude 33° S. North of latitude 33° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1969. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around Gl 397.1B, the Sun would look like a star of magnitude 6.05, in the direction where our sky has the constellation Tucana. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 397.1A 0.04 light-years
- 2MASS J10224821+5825453 3.70 light-years
- 2MASS J10511900+5613086 6.74 light-years
- Gl 363 7.41 light-years
- GJ 3600A 7.87 light-years
- GJ 1133 8.06 light-years
- GJ 3567 8.84 light-years
- GJ 3601B 9.76 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.