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HD 164427
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 18h 04m 42.58968s[1] |
| Declination | −59° 12′ 34.4678″[1] |
| Apparent magnitude (V) | 6.88[2] |
| Characteristics | |
| Spectral type | G0+V[3] |
| B−V color index | 0.624±0.015[2] |
| Astrometry | |
| Radial velocity (Rv) | +3.40±0.25[1] km/s |
| Proper motion (μ) | RA: −196.087[1] mas/yr Dec.: −51.219[1] mas/yr |
| Parallax (π) | 23.4516 ± 0.1836 mas[1] |
| Distance | 139 ± 1 ly (42.6 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.98±0.06[4] |
| Orbit[5] | |
| Period (P) | 108.53855±0.00033 d |
| Semi-major axis (a) | 0.513+0.015 −0.016 AU |
| Eccentricity (e) | 0.54944±0.00073 |
| Inclination (i) | 9.340+0.066 −0.058° |
| Longitude of the node (Ω) | 337.69+0.41 −0.49° |
| Periastron epoch (T) | 2457368.358±0.017 |
| Argument of periastron (ω) (secondary) | −3.187+0.078 −0.070° |
| Semi-amplitude (K1) (primary) | 2.2162+0.0028 −0.0031 km/s |
| Details[5] | |
| Mass | 1.19±0.14 M☉ |
| Radius | 1.404±0.037 R☉ |
| Luminosity | 2.66+0.48 −0.34 L☉ |
| Surface gravity (log g) | 4.216+0.062 −0.069 cgs |
| Temperature | 6,220+310 −240 K |
| Metallicity [Fe/H] | −0.06+0.22 −0.25 dex |
| Age | 6.6+1.3 −0.9[4] Gyr |
| HD 164427 B | |
| Mass | 0.339+0.002 −0.003 M☉ |
| Mass | 355.5+2.6 −2.9 MJup |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 164427 is a star with a likely red dwarf companion in the southern constellation of Pavo. It has an apparent visual magnitude of 6.88,[2] placing it just below the nominal limit for visibility with the typical naked eye. The annual parallax shift of 23.5 mas[1] yields a distance estimate of 139 light-years (43 parsecs). It is moving further from the Earth with a heliocentric radial velocity of +3.4 km/s.[1]
This is an inactive[7] G-type main-sequence star given a stellar classification of G0+V by Gray et al. (2006),[3] although Evans et al. (1964) classified it as a subgiant star with luminosity class IV.[7] It is 6.6 billion years old with 1.125 times the mass of the Sun and 1.40 times the Sun's radius.[8] The star is somewhat over-luminous for its class,[7] radiating 2.33[2] times the Sun's luminosity from its photosphere at an effective temperature of 5,876 K.[3]
- ^ a b c d e f g h Cite error: The named reference
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Anderson2012was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Gray2006was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Holmberg2009was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Unger2023was invoked but never defined (see the help page). - ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Tinney2001was invoked but never defined (see the help page). - ^ Cite error: The named reference
Takeda2007was invoked but never defined (see the help page).
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