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]
GaiaDR2
was invoked but never defined (see the help page).Anderson2012
was invoked but never defined (see the help page).Lesh1968
was invoked but never defined (see the help page).Tetzlaff2011
was invoked but never defined (see the help page).Hohle2010
was invoked but never defined (see the help page).Strom2005
was invoked but never defined (see the help page).SIMBAD
was invoked but never defined (see the help page).McAlister1987
was invoked but never defined (see the help page).Hirata1976
was invoked but never defined (see the help page).lb2017
was invoked but never defined (see the help page).chen2016
was invoked but never defined (see the help page).