Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lacerta |
Right ascension | 22h 24m 30.99149s [1] |
Declination | +49° 28′ 35.0106″ [1] |
Apparent magnitude (V) | 4.55 [2] |
Characteristics | |
Spectral type | A0 Ib [3] |
B−V color index | 0.092±0.034 [2] |
Astrometry | |
Radial velocity (Rv) | −26.0±1.7 [2] km/s |
Proper motion (μ) |
RA: −5.274(82)
[1]
mas/
yr Dec.: −3.303(96) [1] mas/ yr |
Parallax (π) | 1.2656 ± 0.0891 mas [1] |
Distance | 2,600 ± 200
ly (790 ± 60 pc) |
Absolute magnitude (MV) | −4.42 [4] |
Details | |
Mass | 19+13 −8 [5] M☉ |
Radius | 59 [5] R☉ |
Luminosity | 62,000 [5] L☉ |
Surface gravity (log g) | 2.18 [5] cgs |
Temperature | 11,800 [5] K |
Metallicity [Fe/H] | 0.28±0.04 [6] dex |
Rotational velocity (v sin i) | 28±3 [5] km/s |
Age | 25.1±2.5 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
4 Lacertae is a single [9] star in the northern constellation Lacerta, located about 2,600 light years away. [1] This object visible to the naked eye as a white-hued star with an apparent visual magnitude of 4.55. [2] It is moving closer to the Earth with a heliocentric radial velocity of −26 km/s. [2] This star is a suspected member of the Lac OB1 association. [10] [4]
This is a supergiant [10] star with a stellar classification of A0 Ib. [3] The surface abundances show evidence of material that has been processed via the CNO cycle at the core. [10] It has ten [7] times the mass of the Sun and has expanded to about 59 [5] times the Sun's radius. The star is around 25 [7] million years old and is spinning with a projected rotational velocity of 28 km/s. [5] [1] It is believed to be a blue loop star that has already spent time as a red supergiant after fusing the hydrogen within its core.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lacerta |
Right ascension | 22h 24m 30.99149s [1] |
Declination | +49° 28′ 35.0106″ [1] |
Apparent magnitude (V) | 4.55 [2] |
Characteristics | |
Spectral type | A0 Ib [3] |
B−V color index | 0.092±0.034 [2] |
Astrometry | |
Radial velocity (Rv) | −26.0±1.7 [2] km/s |
Proper motion (μ) |
RA: −5.274(82)
[1]
mas/
yr Dec.: −3.303(96) [1] mas/ yr |
Parallax (π) | 1.2656 ± 0.0891 mas [1] |
Distance | 2,600 ± 200
ly (790 ± 60 pc) |
Absolute magnitude (MV) | −4.42 [4] |
Details | |
Mass | 19+13 −8 [5] M☉ |
Radius | 59 [5] R☉ |
Luminosity | 62,000 [5] L☉ |
Surface gravity (log g) | 2.18 [5] cgs |
Temperature | 11,800 [5] K |
Metallicity [Fe/H] | 0.28±0.04 [6] dex |
Rotational velocity (v sin i) | 28±3 [5] km/s |
Age | 25.1±2.5 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
4 Lacertae is a single [9] star in the northern constellation Lacerta, located about 2,600 light years away. [1] This object visible to the naked eye as a white-hued star with an apparent visual magnitude of 4.55. [2] It is moving closer to the Earth with a heliocentric radial velocity of −26 km/s. [2] This star is a suspected member of the Lac OB1 association. [10] [4]
This is a supergiant [10] star with a stellar classification of A0 Ib. [3] The surface abundances show evidence of material that has been processed via the CNO cycle at the core. [10] It has ten [7] times the mass of the Sun and has expanded to about 59 [5] times the Sun's radius. The star is around 25 [7] million years old and is spinning with a projected rotational velocity of 28 km/s. [5] [1] It is believed to be a blue loop star that has already spent time as a red supergiant after fusing the hydrogen within its core.