Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vulpecula |
Right ascension | 19h 34m 34.89705s [1] |
Declination | 19° 46′ 24.2423″ [1] |
Apparent magnitude (V) | 5.010±0.009 [2] (4.99 - 5.08) [3] |
Characteristics | |
Spectral type | B8 IIIn [4] |
Apparent magnitude (U) | 4.499±0.012 [2] |
Apparent magnitude (B) | 4.906±0.011 [2] |
Variable type | suspected [3] |
Astrometry | |
Radial velocity (Rv) | +5.00 [5] km/s |
Proper motion (μ) |
RA: +13.148
[1]
mas/
yr Dec.: +5.142 [1] mas/ yr |
Parallax (π) | 5.8317 ± 0.1242 mas [1] |
Distance | 560 ± 10
ly (171 ± 4 pc) |
Absolute magnitude (MV) | −1.14 [6] |
Details | |
Mass | 3.5 [7] M☉ |
Radius | 2.8 [8] R☉ |
Luminosity | 216 [8] L☉ |
Surface gravity (log g) | 3,54 [7] cgs |
Temperature | 12,042 [7] K |
Metallicity [Fe/H] | −0.03 [7] dex |
Rotational velocity (v sin i) | 185 [9] km/s |
Age | 185 [10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
9 Vulpeculae is a star in the northern constellation of Vulpecula, located about 560 light years away based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.01. The star is moving further from the Earth with a heliocentric radial velocity of +5 km/s.
This a B-type star with a stellar classification of B8 IIIn, [4] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin with a projected rotational velocity of 185 km/s. [9] The star is radiating 216 times the Sun's luminosity from its photosphere at an effective temperature of 12,042 K. This is a suspected variable star of unknown type, ranging in magnitude from 4.99 down to 5.08. [3]
9 Vulpeculae has two reported companions: component B, with a separation of 9.3" and magnitude 13.4, and C, with a separation of 108" and a magnitude of 12.5". [12] [4] Both are unrelated background objects. [13] [14]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vulpecula |
Right ascension | 19h 34m 34.89705s [1] |
Declination | 19° 46′ 24.2423″ [1] |
Apparent magnitude (V) | 5.010±0.009 [2] (4.99 - 5.08) [3] |
Characteristics | |
Spectral type | B8 IIIn [4] |
Apparent magnitude (U) | 4.499±0.012 [2] |
Apparent magnitude (B) | 4.906±0.011 [2] |
Variable type | suspected [3] |
Astrometry | |
Radial velocity (Rv) | +5.00 [5] km/s |
Proper motion (μ) |
RA: +13.148
[1]
mas/
yr Dec.: +5.142 [1] mas/ yr |
Parallax (π) | 5.8317 ± 0.1242 mas [1] |
Distance | 560 ± 10
ly (171 ± 4 pc) |
Absolute magnitude (MV) | −1.14 [6] |
Details | |
Mass | 3.5 [7] M☉ |
Radius | 2.8 [8] R☉ |
Luminosity | 216 [8] L☉ |
Surface gravity (log g) | 3,54 [7] cgs |
Temperature | 12,042 [7] K |
Metallicity [Fe/H] | −0.03 [7] dex |
Rotational velocity (v sin i) | 185 [9] km/s |
Age | 185 [10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
9 Vulpeculae is a star in the northern constellation of Vulpecula, located about 560 light years away based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.01. The star is moving further from the Earth with a heliocentric radial velocity of +5 km/s.
This a B-type star with a stellar classification of B8 IIIn, [4] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin with a projected rotational velocity of 185 km/s. [9] The star is radiating 216 times the Sun's luminosity from its photosphere at an effective temperature of 12,042 K. This is a suspected variable star of unknown type, ranging in magnitude from 4.99 down to 5.08. [3]
9 Vulpeculae has two reported companions: component B, with a separation of 9.3" and magnitude 13.4, and C, with a separation of 108" and a magnitude of 12.5". [12] [4] Both are unrelated background objects. [13] [14]