Star · K

TOI-178

TOI-178 is a main-sequence star of spectral type K in the constellation Sculptor, 205.1 light-years from the Sun. It is orbited by 6 confirmed exoplanet(s).

Constellation	Sculptor
Distance	205.1 light-years (62.9 pc)
Apparent magnitude	magnitude 12.08
Absolute magnitude	magnitude 8.09
Spectral type	K
Surface temperature	4,320 K
Luminosity	0.136 L☉
Radius	0.662 R☉
Mass	0.647 M☉
Age	6.0 billion years
Metallicity [Fe/H]	-0.23
Right ascension (J2000)	0h 29m 12.3s
Declination (J2000)	−30° 27′ 13″
Space velocity (relative to the Sun)	77.4 km/s

In the sky

A telescope is needed to see it: its apparent magnitude is 12.08. Visible from the whole Southern Hemisphere and north to latitude 60° N. South of latitude 60° S it never sets. It stands highest at midnight in September, the best time to observe it.

Through a telescope from Earth

Light's journey

The light you see tonight set out around the year 1821. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.

The Sun seen from there

From a planet around TOI-178, the Sun would look like a star of magnitude 8.82, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.

Planets

TOI-178 b 1.91-day orbit · 1.2 R⊕
TOI-178 c 3.24-day orbit · 1.75 R⊕
TOI-178 d 6.56-day orbit · 2.7 R⊕
TOI-178 e 9.96-day orbit · 2.3 R⊕
TOI-178 f 15.2-day orbit · 2.42 R⊕
TOI-178 g 20.7-day orbit · 2.94 R⊕

Neighbours

Its nearest neighbours in the catalogue (within 20 light-years):

HIP 3182 11.0 light-years
HIP 2273 11.4 light-years
HIP 2031 13.1 light-years
HIP 3629 15.1 light-years
HIP 2239 15.2 light-years
HIP 1500 15.9 light-years
HIP 914 16.1 light-years
HIP 2511 16.9 light-years

Open in the simulation

Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.