Star · ?
GJ 3954
GJ 3954 is a main-sequence star of spectral type ? in the constellation Ophiuchus, 38.8 light-years from the Sun.
| Constellation | Ophiuchus |
|---|---|
| Distance | 38.8 light-years (11.9 pc) |
| Apparent magnitude | magnitude 14.30 |
| Absolute magnitude | magnitude 13.92 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00104 L☉ |
| Radius | 0.0808 R☉ |
| Mass | 0.0958 M☉ (estimated) |
| Right ascension (J2000) | 16h 26m 47.6s |
| Declination (J2000) | −17° 23′ 38″ |
| Space velocity (relative to the Sun) | 28.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.30. Visible from the whole Southern Hemisphere and north to latitude 73° N. South of latitude 73° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1987. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 689 thousand years.
The Sun seen from there
From a planet around GJ 3954, the Sun would look like a star of magnitude 5.21, in the direction where our sky has the constellation Taurus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASSW J1645221-131951 4.48 light-years
- WISE J170745.85-174452.5 6.60 light-years
- Sharjah 9.13 light-years
- Gl 606 9.21 light-years
- 2MASSW J1555157-095605 9.32 light-years
- Gl 595 9.77 light-years
- 18 Sco 10.1 light-years
- Gl 653 10.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.