Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Telescopium |
Right ascension | 19h 22m 37.74947s [1] |
Declination | −51° 13′ 52.6099″ [1] |
Apparent magnitude (V) | 6.42±0.01 [2] |
Characteristics | |
Evolutionary stage | main sequence star [3] |
Spectral type | F0 V [4] |
B−V color index | 0.328±0.007 [5] |
Astrometry | |
Radial velocity (Rv) | −35.7±0.5 [6] km/s |
Proper motion (μ) |
RA: 73.087
mas/
yr
[1] Dec.: −8.778 mas/ yr [1] |
Parallax (π) | 12.9643 ± 0.4818 mas [1] |
Distance | 252 ± 9
ly (77 ± 3 pc) |
Absolute magnitude (MV) | +2.14 [5] |
Details | |
Mass | 1.74 [7] M☉ |
Radius | 2.35±0.15 [8] R☉ |
Luminosity | 13.3+0.9 −0.8 [1] L☉ |
Surface gravity (log g) | 3.84 [9] cgs |
Temperature | 6,850±69 [8] K |
Metallicity [Fe/H] | −0.27 [10] dex |
Rotation | 2.7 d [11] |
Rotational velocity (v sin i) | 56.9±1.9 [11] km/s |
Age | 1.41 [7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 181295 is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.42, [2] placing it near the limit of naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of approximately 252 light-years based on Gaia DR3 parallax measurements, [1] and it is currently drifting closer with a heliocentric radial velocity of −35.7 km/s. [6] At its current distance, HD 181295's brightness is diminished by 0.22 magnitudes [14] due to interstellar extinction and it has an absolute magnitude +2.14. [5]
Proper motion variations from this star was first detected in a 2005 Hipparcos proper motion survey. [15] These variations indicated the presence of an unseen companion tugging on the star. As of the follow up survey published in 2006, it is considered a probable astrometric binary with a 97% chance. [16]
The visible component has a stellar classification of F0 V, [4] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 1.74 times the mass of the Sun [7] and 2.35 times the radius of the Sun. [8] It radiates 13.3 times the luminosity of the Sun [1] from its photosphere at an effective temperature of 6,850 K, [8] giving it the typical yellowish-white of a F-type star. At the age of 1.41 billion years, [7] HD 181295A is a rather evolved star for its class, having completed 77.3% of its main sequence lifetime. [3] The star has an iron abundance of [Fe/H] = −0.27 [10] and it spins modestly with a projected rotational velocity of 56.9 km/s within 2.7 days. [11]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Telescopium |
Right ascension | 19h 22m 37.74947s [1] |
Declination | −51° 13′ 52.6099″ [1] |
Apparent magnitude (V) | 6.42±0.01 [2] |
Characteristics | |
Evolutionary stage | main sequence star [3] |
Spectral type | F0 V [4] |
B−V color index | 0.328±0.007 [5] |
Astrometry | |
Radial velocity (Rv) | −35.7±0.5 [6] km/s |
Proper motion (μ) |
RA: 73.087
mas/
yr
[1] Dec.: −8.778 mas/ yr [1] |
Parallax (π) | 12.9643 ± 0.4818 mas [1] |
Distance | 252 ± 9
ly (77 ± 3 pc) |
Absolute magnitude (MV) | +2.14 [5] |
Details | |
Mass | 1.74 [7] M☉ |
Radius | 2.35±0.15 [8] R☉ |
Luminosity | 13.3+0.9 −0.8 [1] L☉ |
Surface gravity (log g) | 3.84 [9] cgs |
Temperature | 6,850±69 [8] K |
Metallicity [Fe/H] | −0.27 [10] dex |
Rotation | 2.7 d [11] |
Rotational velocity (v sin i) | 56.9±1.9 [11] km/s |
Age | 1.41 [7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 181295 is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.42, [2] placing it near the limit of naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of approximately 252 light-years based on Gaia DR3 parallax measurements, [1] and it is currently drifting closer with a heliocentric radial velocity of −35.7 km/s. [6] At its current distance, HD 181295's brightness is diminished by 0.22 magnitudes [14] due to interstellar extinction and it has an absolute magnitude +2.14. [5]
Proper motion variations from this star was first detected in a 2005 Hipparcos proper motion survey. [15] These variations indicated the presence of an unseen companion tugging on the star. As of the follow up survey published in 2006, it is considered a probable astrometric binary with a 97% chance. [16]
The visible component has a stellar classification of F0 V, [4] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 1.74 times the mass of the Sun [7] and 2.35 times the radius of the Sun. [8] It radiates 13.3 times the luminosity of the Sun [1] from its photosphere at an effective temperature of 6,850 K, [8] giving it the typical yellowish-white of a F-type star. At the age of 1.41 billion years, [7] HD 181295A is a rather evolved star for its class, having completed 77.3% of its main sequence lifetime. [3] The star has an iron abundance of [Fe/H] = −0.27 [10] and it spins modestly with a projected rotational velocity of 56.9 km/s within 2.7 days. [11]