Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 15m 56.2876s [1] |
Declination | +33° 21′ 32.032″ [1] |
Apparent magnitude (V) | 5.25±0.01 [2] |
Characteristics | |
Spectral type | A0 V [3] or B9.5 V [4] |
U−B color index | −0.03 [5] |
B−V color index | −0.01 [5] |
Astrometry | |
Radial velocity (Rv) | −1.3±2 [6] km/s |
Proper motion (μ) |
RA: −15.234
[1]
mas/
yr Dec.: −32.711 [1] mas/ yr |
Parallax (π) | 9.0683 ± 0.137 mas [1] |
Distance | 360 ± 5
ly (110 ± 2 pc) |
Absolute magnitude (MV) | 0.58 [7] |
Details | |
Mass | 2.77 [8] M☉ |
Radius | 3.24±0.11 [9] R☉ |
Luminosity | 89.1+10.5 −8.1 [9] L☉ |
Surface gravity (log g) | 4.02±0.14 [8] cgs |
Temperature | 10685±363 [8] K |
Rotational velocity (v sin i) | 130 [10] km/s |
Age | 283 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
7 Trianguli is a solitary [11] star located in the northern constellation Triangulum. It has an apparent magnitude of 5.25, [2] making it faintly visible to the naked eye under ideal conditions. The star is situated at distance of 360 light years [1] but is approaching with a heliocentric radial velocity of −1.3 km/s, [6] which is poorly constrained.
7 Trianguli has a stellar classification of A0 V [3] or B9.5 V, [4] depending on the study. At present it has 2.77 times the mass of the Sun [8] and 3.24 times the radius of the Sun. [9] It shines at 89.1 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 10,685 K, [8] giving it a blueish white glow. 7 Trianguli is a young star, with an age of 283 million years [8] and spins rapidly with a projected rotational velocity of 130 km/s. [10] It has been classified as having a peculiar spectrum, [12] but it is considered doubtful that it is actually a chemically peculiar star. [13]
Together with δ Trianguli and γ Trianguli, it forms an optical (line-of-sight) triple.
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 15m 56.2876s [1] |
Declination | +33° 21′ 32.032″ [1] |
Apparent magnitude (V) | 5.25±0.01 [2] |
Characteristics | |
Spectral type | A0 V [3] or B9.5 V [4] |
U−B color index | −0.03 [5] |
B−V color index | −0.01 [5] |
Astrometry | |
Radial velocity (Rv) | −1.3±2 [6] km/s |
Proper motion (μ) |
RA: −15.234
[1]
mas/
yr Dec.: −32.711 [1] mas/ yr |
Parallax (π) | 9.0683 ± 0.137 mas [1] |
Distance | 360 ± 5
ly (110 ± 2 pc) |
Absolute magnitude (MV) | 0.58 [7] |
Details | |
Mass | 2.77 [8] M☉ |
Radius | 3.24±0.11 [9] R☉ |
Luminosity | 89.1+10.5 −8.1 [9] L☉ |
Surface gravity (log g) | 4.02±0.14 [8] cgs |
Temperature | 10685±363 [8] K |
Rotational velocity (v sin i) | 130 [10] km/s |
Age | 283 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
7 Trianguli is a solitary [11] star located in the northern constellation Triangulum. It has an apparent magnitude of 5.25, [2] making it faintly visible to the naked eye under ideal conditions. The star is situated at distance of 360 light years [1] but is approaching with a heliocentric radial velocity of −1.3 km/s, [6] which is poorly constrained.
7 Trianguli has a stellar classification of A0 V [3] or B9.5 V, [4] depending on the study. At present it has 2.77 times the mass of the Sun [8] and 3.24 times the radius of the Sun. [9] It shines at 89.1 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 10,685 K, [8] giving it a blueish white glow. 7 Trianguli is a young star, with an age of 283 million years [8] and spins rapidly with a projected rotational velocity of 130 km/s. [10] It has been classified as having a peculiar spectrum, [12] but it is considered doubtful that it is actually a chemically peculiar star. [13]
Together with δ Trianguli and γ Trianguli, it forms an optical (line-of-sight) triple.