Star · K2
HD 18143
HD 18143 is a main-sequence star of spectral type K2 in the constellation Aries, 73.4 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | Gl 118.2A · HIP 13642 |
|---|---|
| Constellation | Aries |
| Distance | 73.4 light-years (22.5 pc) |
| Apparent magnitude | magnitude 7.52 |
| Absolute magnitude | magnitude 5.76 |
| Spectral type | K2 |
| Surface temperature | 5,080 K |
| Luminosity | 0.479 L☉ |
| Radius | 0.87 R☉ |
| Mass | 0.85 M☉ |
| Age | 9.4 billion years |
| Metallicity [Fe/H] | 0.28 |
| Right ascension (J2000) | 2h 55m 39.1s |
| Declination (J2000) | +26° 52′ 24″ |
| Space velocity (relative to the Sun) | 47.3 km/s |
In the sky
Too faint for the naked eye (magnitude 7.52); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° 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 1953. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around HD 18143, the Sun would look like a star of magnitude 6.59, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Planets
- HD 18143 b 10.3-day orbit · 3.28 R⊕
- HD 18143 c 29,000-day orbit · 12.5 R⊕
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.