Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 20h 37m 51.70984s [1] |
Declination | −60° 38′ 04.1460″ [1] |
Apparent magnitude (V) | 7.50 [2] + 10.62 [3] + 15.6 [3] |
Characteristics | |
Spectral type | G3V [4] + M1.5-M4.5 + M2.5-M5.5 [3] |
B−V color index | 0.667±0.010 [2] |
Astrometry | |
Radial velocity (Rv) | +61.37±0.12 [1] km/s |
Proper motion (μ) |
RA: −191.118(14)
mas/
yr
[1] Dec.: −65.020(15) mas/ yr [1] |
Parallax (π) | 19.7872 ± 0.0205 mas [1] |
Distance | 164.8 ± 0.2
ly (50.54 ± 0.05 pc) |
Absolute magnitude (MV) | 4.01 [2] |
Details [5] | |
A | |
Mass | 1.18±0.02 [6] M☉ |
Radius | 1.46+0.02 −0.03 R☉ |
Luminosity | 2.213+0.007 −0.006 [6] L☉ |
Surface gravity (log g) | 4.32 cgs |
Temperature | 5,834+55 −52 [6] K |
Metallicity [Fe/H] | 0.34±0.06 dex |
Rotation | 16.0 d [7] |
Rotational velocity (v sin i) | 3.0 km/s |
Age | 2.5±1.3 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 196050 is a triple star [9] [3] system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50 [2] and the absolute magnitude is 4.01. [2] It is located at a distance of 165 light-years (51 parsecs) from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s. [1] It is also called by the Hipparcos designation HIP 101806.
The primary component is a G-type main-sequence star with a stellar classification of G3V. [4] It has a quiescent chromosphere and does not appear to be variable. [9] The star has 18% [6] more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s. [5] The star is radiating 2.21 [6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,834 K. [6]
A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004, [9] located 10.80 ″ [3] to the south of the primary component. This corresponds to a projected separation of 7,511±22 AU. [9] The star is magnitude 10.62 [3] A third companion, component C, was discovered in 2007, located about 0.4″ from component B. [10] It has a visual magnitude of 15.6. [3]
In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star. [11] The discovery was independently confirmed by the Geneva Extrasolar Planet Search team. [7] In 2023, the inclination and true mass of HD 196050 b were determined via astrometry. [12]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 4.55+0.69 −0.72 MJ |
2.585+0.032 −0.035 |
3.813+0.026 −0.024 |
0.178±0.011 | 41.0+10.0 −6.3 or 139.0+6.3 −10.0 ° |
— |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 20h 37m 51.70984s [1] |
Declination | −60° 38′ 04.1460″ [1] |
Apparent magnitude (V) | 7.50 [2] + 10.62 [3] + 15.6 [3] |
Characteristics | |
Spectral type | G3V [4] + M1.5-M4.5 + M2.5-M5.5 [3] |
B−V color index | 0.667±0.010 [2] |
Astrometry | |
Radial velocity (Rv) | +61.37±0.12 [1] km/s |
Proper motion (μ) |
RA: −191.118(14)
mas/
yr
[1] Dec.: −65.020(15) mas/ yr [1] |
Parallax (π) | 19.7872 ± 0.0205 mas [1] |
Distance | 164.8 ± 0.2
ly (50.54 ± 0.05 pc) |
Absolute magnitude (MV) | 4.01 [2] |
Details [5] | |
A | |
Mass | 1.18±0.02 [6] M☉ |
Radius | 1.46+0.02 −0.03 R☉ |
Luminosity | 2.213+0.007 −0.006 [6] L☉ |
Surface gravity (log g) | 4.32 cgs |
Temperature | 5,834+55 −52 [6] K |
Metallicity [Fe/H] | 0.34±0.06 dex |
Rotation | 16.0 d [7] |
Rotational velocity (v sin i) | 3.0 km/s |
Age | 2.5±1.3 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 196050 is a triple star [9] [3] system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50 [2] and the absolute magnitude is 4.01. [2] It is located at a distance of 165 light-years (51 parsecs) from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s. [1] It is also called by the Hipparcos designation HIP 101806.
The primary component is a G-type main-sequence star with a stellar classification of G3V. [4] It has a quiescent chromosphere and does not appear to be variable. [9] The star has 18% [6] more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s. [5] The star is radiating 2.21 [6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,834 K. [6]
A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004, [9] located 10.80 ″ [3] to the south of the primary component. This corresponds to a projected separation of 7,511±22 AU. [9] The star is magnitude 10.62 [3] A third companion, component C, was discovered in 2007, located about 0.4″ from component B. [10] It has a visual magnitude of 15.6. [3]
In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star. [11] The discovery was independently confirmed by the Geneva Extrasolar Planet Search team. [7] In 2023, the inclination and true mass of HD 196050 b were determined via astrometry. [12]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 4.55+0.69 −0.72 MJ |
2.585+0.032 −0.035 |
3.813+0.026 −0.024 |
0.178±0.011 | 41.0+10.0 −6.3 or 139.0+6.3 −10.0 ° |
— |