HD 153557 is 58.5 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this K0 star; the first was found in 2022 by radial velocity (Multiple Observatories).
Fly there in 3DHD 153557 b goes round its star every 7.30 days, 12 times as often as Mercury goes round the Sun.
| Spectral type | K0 |
| Surface temperature | 4,837 K |
| Mass | 0.79 solar masses |
| Radius | 0.745171 solar radii |
| Luminosity | 0.2738 times the Sun |
| Apparent magnitude | 7.83 |
| Distance from the Sun | 58.5 light-years (17.9 parsecs) |
| Position (J2000) | RA 254.4707°, Dec 47.3679° |
| Constellation | Hercules |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 153557 b | 7.30 days | 0.0680 AU | 4.77 R⊕ estimated | 20.341 M⊕ minimum | Radial Velocity, 2022 |
| HD 153557 c | 15.3 days | 0.111 AU | 4.36 R⊕ estimated | 17.481 M⊕ minimum | Radial Velocity, 2022 |
| HD 153557 d | 111.3 years | 21.449 AU | 11.9 R⊕ estimated | 8725.7 M⊕ | Radial Velocity, 2022 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.