The projected rotational velocity rate (v sin i) is smaller than 2 km/s, compatible with a slow-rotating or pole-on star relative to Earth.

[7] It is a high-velocity star—it is moving quickly compared to the average—and hence is probably a member of Population II, generally older stars whose motions take them well outside the plane of the Milky Way.

[12][2] This star is located in a region of low-density interstellar matter (ISM), so it is believed to have a large astropause that subtends an angle of 6″ across the sky.

The equilibrium temperature for the most distant planet, based on an assumed Bond albedo of 0.3, would be about 388 K (115 °C); significantly above the boiling point of water.

[5]) Using the TERRA algorithm, developed by Guillem Anglada-Escudé and R. Paul Butler in 2012, to describe better and filter out noise interference to extract more precise radial velocity measurements, a team of scientists led by Fabo Feng, in 2017, provided evidence for up to three more planets.

[19] In an article published in the journal Astronomy & Astrophysics, scientists said an analysis of 20 years of observational data had found HD 20794 d could be a rocky planet (though its composition is unknown and it could also be a mini-Neptune[5]: 10 ) and should be "a high-priority target for future atmospheric characterization with direct imaging facilities.

"[5] About six times the mass of Earth, the planet orbits "at the right distance from its star to sustain liquid water on its surface — a key ingredient for life as we know it.

Data for the research was gathered at the High Accuracy Radial Velocity Planet Searcher spectrograph at La Silla Observatory in Chile.