Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Lyra |
Right ascension | 18h 46m 13.01070s [1] |
Declination | +41° 26′ 30.5041″ [1] |
Apparent magnitude (V) | 6.06 [2] |
Characteristics | |
Spectral type | B3IVp [3] [4] |
B−V color index | −0.139±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −15.0±2.9 [2] km/s |
Proper motion (μ) |
RA: +1.093
[1]
mas/
yr Dec.: −3.957 [1] mas/ yr |
Parallax (π) | 2.5407 ± 0.0769 mas [1] |
Distance | 1,280 ± 40
ly (390 ± 10 pc) |
Absolute magnitude (MV) | −1.57 [2] |
Details | |
Mass | 6.6±0.1 [4] M☉ |
Luminosity (bolometric) | 2,036 [5] L☉ |
Temperature | 17,900 [5] K |
Rotational velocity (v sin i) | 5 [6] km/s |
Age | 32.8±5.0 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 174179 is a single [8] star in the northern constellation of Lyra. It has a white hue and is dimly visible to the naked eye with an apparent visual magnitude of 6.06. [2] The star is located at a distance of approximately 1,280 light years from the Sun based on parallax, [1] but is drifting closer with a radial velocity of −15 km/s. [2]
The star is an estimated 33 [4] million years old with a low projected rotational velocity of 5 km/s. [6] It has 6.6 [4] times the mass of the Sun and is radiating 2,036 [5] times the Sun's luminosity from its photosphere at an effective temperature of 17,900 K. [5]
HD 174179 is a Be star, showing Balmer emission lines in its spectrum at times. It has a stellar classification of B3IVp, [4] with 'p' indicating spectral features of a shell star. [3] A 1976 study found no emission features, [9] but the star was reported to show emission lines again in later studies. [10] [11]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Lyra |
Right ascension | 18h 46m 13.01070s [1] |
Declination | +41° 26′ 30.5041″ [1] |
Apparent magnitude (V) | 6.06 [2] |
Characteristics | |
Spectral type | B3IVp [3] [4] |
B−V color index | −0.139±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −15.0±2.9 [2] km/s |
Proper motion (μ) |
RA: +1.093
[1]
mas/
yr Dec.: −3.957 [1] mas/ yr |
Parallax (π) | 2.5407 ± 0.0769 mas [1] |
Distance | 1,280 ± 40
ly (390 ± 10 pc) |
Absolute magnitude (MV) | −1.57 [2] |
Details | |
Mass | 6.6±0.1 [4] M☉ |
Luminosity (bolometric) | 2,036 [5] L☉ |
Temperature | 17,900 [5] K |
Rotational velocity (v sin i) | 5 [6] km/s |
Age | 32.8±5.0 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 174179 is a single [8] star in the northern constellation of Lyra. It has a white hue and is dimly visible to the naked eye with an apparent visual magnitude of 6.06. [2] The star is located at a distance of approximately 1,280 light years from the Sun based on parallax, [1] but is drifting closer with a radial velocity of −15 km/s. [2]
The star is an estimated 33 [4] million years old with a low projected rotational velocity of 5 km/s. [6] It has 6.6 [4] times the mass of the Sun and is radiating 2,036 [5] times the Sun's luminosity from its photosphere at an effective temperature of 17,900 K. [5]
HD 174179 is a Be star, showing Balmer emission lines in its spectrum at times. It has a stellar classification of B3IVp, [4] with 'p' indicating spectral features of a shell star. [3] A 1976 study found no emission features, [9] but the star was reported to show emission lines again in later studies. [10] [11]