Star · A1
Mesarthim
Mesarthim is a main-sequence star of spectral type A1 in the constellation Aries, 166.2 light-years from the Sun.
| Other names | γ² Ari · HIP 8832 |
|---|---|
| Constellation | Aries |
| Distance | 166.2 light-years (51.0 pc) |
| Apparent magnitude | magnitude 3.88 |
| Absolute magnitude | magnitude 0.34 |
| Spectral type | A1 |
| Surface temperature | 10,750 K |
| Luminosity | 96.8 L☉ |
| Radius | 2.83 R☉ |
| Mass | 3.35 M☉ (estimated) |
| Right ascension (J2000) | 1h 53m 31.8s |
| Declination (J2000) | +19° 17′ 38″ |
| Space velocity (relative to the Sun) | 30.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.88). 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 October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1860. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.9 million years.
The Sun seen from there
From a planet around Mesarthim, the Sun would look like a star of magnitude 8.37, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 8726 8.60 light-years
- HIP 7626 11.7 light-years
- HIP 9492 12.1 light-years
- HIP 8426 16.2 light-years
- SDSS J015354.23+140452.9 16.5 light-years
- HIP 8489 16.6 light-years
- HIP 8766 16.9 light-years
- ULAS J020529.62+142114.0 17.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.