Star · M1
GJ 3998
GJ 3998 is a main-sequence star of spectral type M1 in the constellation Ophiuchus, 59.3 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Other names | HIP 84460 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 59.3 light-years (18.2 pc) |
| Apparent magnitude | magnitude 11.01 |
| Absolute magnitude | magnitude 9.71 |
| Spectral type | M1 |
| Surface temperature | 3,730 K |
| Luminosity | 0.0439 L☉ |
| Radius | 0.5 R☉ |
| Mass | 0.52 M☉ |
| Age | 8.4 billion years |
| Metallicity [Fe/H] | -0.13 |
| Right ascension (J2000) | 17h 16m 00.6s |
| Declination (J2000) | +11° 03′ 27″ |
| Space velocity (relative to the Sun) | 55.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.01. Visible from the whole Northern Hemisphere and south to latitude 79° S. North of latitude 79° 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 1967. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around GJ 3998, the Sun would look like a star of magnitude 6.13, in the direction where our sky has the constellation Lepus. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.