| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 19m 51.40032s[1] |
| Declination | –48° 32′ 57.5538″[1] |
| Apparent magnitude (V) | 6.67[2] |
| Characteristics | |
| Spectral type | G1V(w)[3] |
| Apparent magnitude (B) | 7.284[2] |
| Apparent magnitude (J) | 5.563±0.018[2] |
| Apparent magnitude (H) | 5.241±0.031[2] |
| Apparent magnitude (K) | 5.170±0.021[2] |
| B−V color index | 0.614±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | −38.76±0.18[1] km/s |
| Proper motion (μ) | RA: −33.184[1] mas/yr Dec.: −211.549[1] mas/yr |
| Parallax (π) | 17.5567 ± 0.0559 mas[1] |
| Distance | 185.8 ± 0.6 ly (57.0 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.976[4] |
| Details[5] | |
| Mass | 1.24±0.03 M☉ |
| Radius | 2.15±0.11 R☉ |
| Luminosity | 5.38[4] L☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 5,908±16 K |
| Metallicity [Fe/H] | −0.12±0.02 dex |
| Rotational velocity (v sin i) | 1.84±0.23 km/s |
| Age | 4.28±0.42 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 156411 is a 7th magnitude G-type main-sequence star located approximately 186 light years away in the southern constellation Ara. This star is larger, hotter, brighter, and more massive than the Sun. Its metal content is three-fourths as much as the Sun. The star is around 4.3 billion years old and is spinning with a projected rotational velocity of 1.8 km/s.[5] Naef and associates (2010) noted the star appears to be slightly evolved,[4] and thus may be in the process of leaving the main sequence. In 2009, a gas giant planet was found in orbit around the star.[4]
The star HD 156411 is named Inquill. The name was selected in the NameExoWorlds campaign by Peru, during the 100th anniversary of the IAU. Inquil was one half of the couple involved in the tragic love story Way to the Sun by Abraham Valdelomar.[7][8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Sumajmajta | ≥ 0.74+0.05 −0.04 MJ |
1.88+0.03 −0.04 |
842.2±14.5 | 0.22±0.08 | — | — |
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