Star · A7V
21 LMi
21 LMi is a main-sequence star of spectral type A7V in the constellation Leo Minor, 89.8 light-years from the Sun.
| Other names | Gl 378.3 · HIP 49593 |
|---|---|
| Constellation | Leo Minor |
| Distance | 89.8 light-years (27.5 pc) |
| Apparent magnitude | magnitude 4.49 |
| Absolute magnitude | magnitude 2.29 |
| Spectral type | A7V |
| Surface temperature | 8,240 K |
| Luminosity | 11.2 L☉ |
| Radius | 1.64 R☉ |
| Mass | 1.83 M☉ (estimated) |
| Right ascension (J2000) | 10h 07m 25.7s |
| Declination (J2000) | +35° 14′ 41″ |
| Space velocity (relative to the Sun) | 15.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.49). Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° 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 1936. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around 21 LMi, the Sun would look like a star of magnitude 7.03, in the direction where our sky has the constellation Piscis Austrinus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 49066 5.08 light-years
- Wolf 327 5.68 light-years
- HIP 50226 7.15 light-years
- SDSS J102552.43+321234.0 7.93 light-years
- GJ 3607 8.34 light-years
- HIP 50773 10.2 light-years
- 19 LMi 10.8 light-years
- GJ 3577A 13.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.