Star · M4V
CWISE J043941.41+202514.8
CWISE J043941.41+202514.8 is a main-sequence star of spectral type M4V in the constellation Taurus, 140.2 light-years from the Sun.
| Constellation | Taurus |
|---|---|
| Distance | 140.2 light-years (43.0 pc) |
| Apparent magnitude | magnitude 24.95 |
| Absolute magnitude | magnitude 21.78 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.04 × 10⁻⁶ L☉ |
| Radius | 0.00656 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 4h 39m 41.3s |
| Declination (J2000) | +20° 25′ 15″ |
| Space velocity (relative to the Sun) | 17.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 24.95. Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° 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 1886. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around CWISE J043941.41+202514.8, the Sun would look like a star of magnitude 8.00, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J044105.56+213001.5 4.29 light-years
- HIP 21256 4.59 light-years
- HIP 21923 5.08 light-years
- HIP 21946 6.64 light-years
- HIP 22350 6.69 light-years
- HIP 21637 6.86 light-years
- HIP 21459 7.66 light-years
- Ain 9.11 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.