Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Octans |
A | |
Right ascension | 22h 25m 51.15504s [1] |
Declination | −75° 00′ 56.4763″ [1] |
Apparent magnitude (V) | 6.12±0.01 [2] |
B | |
Right ascension | 22h 25m 56.54954s [3] |
Declination | −75° 00′ 52.3437″ [3] |
Apparent magnitude (V) | 9.35 [4] |
Characteristics | |
A | |
Spectral type | G0 V [5] |
U−B color index | +0.14 [6] |
B−V color index | +0.64 [6] |
B | |
Spectral type | K2V [7] |
Astrometry | |
A | |
Radial velocity (Rv) | 15±0.2 [8] km/s |
Proper motion (μ) |
RA: +57.385
mas/
yr
[1] Dec.: +12.835 mas/ yr [1] |
Parallax (π) | 42.7219 ± 0.0196 mas [1] |
Distance | 76.34 ± 0.04
ly (23.41 ± 0.01 pc) |
Absolute magnitude (MV) | +4.31 [4] |
B | |
Radial velocity (Rv) | 15±0.5 [9] km/s |
Proper motion (μ) |
RA: +33.330
mas/
yr
[3] Dec.: −3.785 mas/ yr [3] |
Parallax (π) | 42.692 ± 0.2479 mas [3] |
Distance | 76.4 ± 0.4
ly (23.4 ± 0.1 pc) |
Absolute magnitude (MV) | +6.92 [10] |
Orbit [11] | |
Primary | Ba |
Companion | Bb |
Period (P) | 11 yr |
Semi-major axis (a) | 0.254″ |
Inclination (i) | 87.3° |
Longitude of the node (Ω) | 235° |
Periastron epoch (T) | 2022.21 |
Argument of periastron (ω) (secondary) | 270° |
Details | |
A | |
Mass | 1.05+0.04 −0.03 [12] M☉ |
Radius | 1.17 [13] R☉ |
Luminosity | 1.57 [14] L☉ |
Surface gravity (log g) | 4.29±0.04 [12] cgs |
Temperature | 5,935 [15] K |
Metallicity [Fe/H] | +0.02±0.06 [12] dex |
Rotational velocity (v sin i) | 3.6 [16] km/s |
Age | 4.7 [17] Gyr |
B | |
Mass | 0.76 (combined) [18] M☉ |
Other designations | |
A: FK5 3789, GC 31308, HIP 110712, SAO 258036 | |
B: HIP 110719 | |
Database references | |
SIMBAD | A |
B |
HR 8526, also known as HD 212168, is the primary of a triple star located in the southern circumpolar constellation Octans. The star and its companion have apparent magnitudes of 6.12 and 9.36 respectively. [2] [4] The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements, [3] [1] but is receding with a heliocentric radial velocity of 15 km/s. [8] [9]
This is a Sun-like star with a stellar classification of G0 V. [5] It has 105% the mass of the Sun [12] and 117% its girth. [13] It radiates 157% the luminosity of the Sun [14] from its photosphere at an effective temperature of 5,935 K, [15] giving it a whitish-yellow hue. HR 8526 has an iron abundance similar to the Sun's [12] and spins modestly with a projected rotational velocity of 3.6 km/s. [16] HD 212168 has a similar age to the Sun; the former is 4.7 billion years old [17] while the latter is 4.6 billion years old.
The B subsystem is located 14 ″ away along a position angle of 78°. [21] It has a combined mass 76% that of the Sun [18] and take roughly 11 years to orbit each other. [11] Spectral classifications for this star vary from G0-V to K2V. [7] [22] The G0 class has been used as an argument that the two visible components form a purely optical pair, [23] but this has been dismissed as mis-identification or contamination and that the actual spectral class is early or mid K. [10]
DENIS J222644.3-750342 is a cool M8 red dwarf [24] located 264 arcseconds away from HR 8526. [21] In 2012, J.A. Caballero identified it as a companion to the AB system, making it a quadruple star system. [10]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Octans |
A | |
Right ascension | 22h 25m 51.15504s [1] |
Declination | −75° 00′ 56.4763″ [1] |
Apparent magnitude (V) | 6.12±0.01 [2] |
B | |
Right ascension | 22h 25m 56.54954s [3] |
Declination | −75° 00′ 52.3437″ [3] |
Apparent magnitude (V) | 9.35 [4] |
Characteristics | |
A | |
Spectral type | G0 V [5] |
U−B color index | +0.14 [6] |
B−V color index | +0.64 [6] |
B | |
Spectral type | K2V [7] |
Astrometry | |
A | |
Radial velocity (Rv) | 15±0.2 [8] km/s |
Proper motion (μ) |
RA: +57.385
mas/
yr
[1] Dec.: +12.835 mas/ yr [1] |
Parallax (π) | 42.7219 ± 0.0196 mas [1] |
Distance | 76.34 ± 0.04
ly (23.41 ± 0.01 pc) |
Absolute magnitude (MV) | +4.31 [4] |
B | |
Radial velocity (Rv) | 15±0.5 [9] km/s |
Proper motion (μ) |
RA: +33.330
mas/
yr
[3] Dec.: −3.785 mas/ yr [3] |
Parallax (π) | 42.692 ± 0.2479 mas [3] |
Distance | 76.4 ± 0.4
ly (23.4 ± 0.1 pc) |
Absolute magnitude (MV) | +6.92 [10] |
Orbit [11] | |
Primary | Ba |
Companion | Bb |
Period (P) | 11 yr |
Semi-major axis (a) | 0.254″ |
Inclination (i) | 87.3° |
Longitude of the node (Ω) | 235° |
Periastron epoch (T) | 2022.21 |
Argument of periastron (ω) (secondary) | 270° |
Details | |
A | |
Mass | 1.05+0.04 −0.03 [12] M☉ |
Radius | 1.17 [13] R☉ |
Luminosity | 1.57 [14] L☉ |
Surface gravity (log g) | 4.29±0.04 [12] cgs |
Temperature | 5,935 [15] K |
Metallicity [Fe/H] | +0.02±0.06 [12] dex |
Rotational velocity (v sin i) | 3.6 [16] km/s |
Age | 4.7 [17] Gyr |
B | |
Mass | 0.76 (combined) [18] M☉ |
Other designations | |
A: FK5 3789, GC 31308, HIP 110712, SAO 258036 | |
B: HIP 110719 | |
Database references | |
SIMBAD | A |
B |
HR 8526, also known as HD 212168, is the primary of a triple star located in the southern circumpolar constellation Octans. The star and its companion have apparent magnitudes of 6.12 and 9.36 respectively. [2] [4] The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements, [3] [1] but is receding with a heliocentric radial velocity of 15 km/s. [8] [9]
This is a Sun-like star with a stellar classification of G0 V. [5] It has 105% the mass of the Sun [12] and 117% its girth. [13] It radiates 157% the luminosity of the Sun [14] from its photosphere at an effective temperature of 5,935 K, [15] giving it a whitish-yellow hue. HR 8526 has an iron abundance similar to the Sun's [12] and spins modestly with a projected rotational velocity of 3.6 km/s. [16] HD 212168 has a similar age to the Sun; the former is 4.7 billion years old [17] while the latter is 4.6 billion years old.
The B subsystem is located 14 ″ away along a position angle of 78°. [21] It has a combined mass 76% that of the Sun [18] and take roughly 11 years to orbit each other. [11] Spectral classifications for this star vary from G0-V to K2V. [7] [22] The G0 class has been used as an argument that the two visible components form a purely optical pair, [23] but this has been dismissed as mis-identification or contamination and that the actual spectral class is early or mid K. [10]
DENIS J222644.3-750342 is a cool M8 red dwarf [24] located 264 arcseconds away from HR 8526. [21] In 2012, J.A. Caballero identified it as a companion to the AB system, making it a quadruple star system. [10]