Star · M4V
Roque 25
Roque 25 is a main-sequence star of spectral type M4V in the constellation Taurus, 489.2 light-years from the Sun.
| Constellation | Taurus |
|---|---|
| Distance | 489.2 light-years (150.0 pc) |
| Apparent magnitude | magnitude 23.21 |
| Absolute magnitude | magnitude 17.33 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.84 × 10⁻⁴ L☉ |
| Radius | 0.051 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 3h 48m 30.7s |
| Declination (J2000) | +22° 44′ 51″ |
| Space velocity (relative to the Sun) | 27.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.21. Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1537. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8.7 million years.
The Sun seen from there
From a planet around Roque 25, the Sun would look like a star of magnitude 10.71, in the direction where our sky has the constellation Scorpius. 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.