Star · G1 V
Sika
Sika is a main-sequence star of spectral type G1 V in the constellation Sagittarius, 195.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HD 181720 · HIP 95262 |
|---|---|
| Constellation | Sagittarius |
| Distance | 195.6 light-years (60.0 pc) |
| Apparent magnitude | magnitude 7.84 |
| Absolute magnitude | magnitude 3.95 |
| Spectral type | G1 V |
| Surface temperature | 5,740 K |
| Luminosity | 1.94 L☉ |
| Radius | 1.5 R☉ |
| Mass | 1.03 M☉ |
| Metallicity [Fe/H] | -0.62 |
| Right ascension (J2000) | 19h 22m 53.0s |
| Declination (J2000) | −32° 55′ 09″ |
| Space velocity (relative to the Sun) | 128.9 km/s |
In the sky
Too faint for the naked eye (magnitude 7.84); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1830. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around Sika, the Sun would look like a star of magnitude 8.72, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Planets
- HD 181720 b 956-day orbit · 14 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 95641 7.49 light-years
- HIP 95313 9.60 light-years
- HIP 94583 14.2 light-years
- HIP 94926 16.1 light-years
- HIP 96881 16.3 light-years
- HIP 94938 16.4 light-years
- HIP 96915 16.9 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.