Star · M4V
SDSS J082539.87+310040.7
SDSS J082539.87+310040.7 is a main-sequence star of spectral type M4V in the constellation Cancer, 652.3 light-years from the Sun.
| Constellation | Cancer |
|---|---|
| Distance | 652.3 light-years (200.0 pc) |
| Apparent magnitude | magnitude 21.94 |
| Absolute magnitude | magnitude 15.43 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 0.00105 L☉ |
| Radius | 0.122 R☉ |
| Mass | 0.0961 M☉ (estimated) |
| Right ascension (J2000) | 8h 25m 39.9s |
| Declination (J2000) | +31° 00′ 41″ |
| Space velocity (relative to the Sun) | 37.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.94. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1374. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around SDSS J082539.87+310040.7, the Sun would look like a star of magnitude 11.34, in the direction where our sky has the constellation Sagittarius. 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.