Star · M4V
2MASSW J1728114+394859
2MASSW J1728114+394859 is a main-sequence star of spectral type M4V in the constellation Hercules, 89.7 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 89.7 light-years (27.5 pc) |
| Apparent magnitude | magnitude 21.49 |
| Absolute magnitude | magnitude 19.29 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.01 × 10⁻⁵ L☉ |
| Radius | 0.0207 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 17h 28m 11.5s |
| Declination (J2000) | +39° 48′ 59″ |
| Space velocity (relative to the Sun) | 5.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.49. Visible from the whole Northern Hemisphere and south to latitude 50° S. North of latitude 50° N it never sets. It stands highest at midnight in June, 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 2MASSW J1728114+394859, the Sun would look like a star of magnitude 7.03, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASSI J1707333+430130 9.00 light-years
- CWISE J170127.12+415805.3 9.27 light-years
- PSO J260.3363+46.6739 11.1 light-years
- GJ 1213 12.6 light-years
- Gl 679 13.5 light-years
- HIP 81919 14.1 light-years
- SDSS J175024.01+422237.8 14.9 light-years
- GJ 3978 15.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.