Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scutum |
Right ascension | 18h 57m 03.67027s [1] |
Declination | −5° 50′ 46.7305″ [1] |
Apparent magnitude (V) | 4.83 [2] |
Characteristics | |
Evolutionary stage | horizontal branch [3] |
Spectral type | K1-III [4] |
U−B color index | +1.02 [5] |
B−V color index | +1.08 [5] |
Astrometry | |
Radial velocity (Rv) | −92.22±0.16 [1] km/s |
Proper motion (μ) |
RA: +61.545
[1]
mas/
yr Dec.: −41.429 [1] mas/ yr |
Parallax (π) | 15.2960 ± 0.1740 mas [1] |
Distance | 213 ± 2
ly (65.4 ± 0.7 pc) |
Absolute magnitude (MV) | 0.87 [2] |
Details | |
Mass | 1.50 [6] M☉ |
Radius | 11.97+0.18 −0.13 [1] R☉ |
Luminosity | 62.7±0.8 [1] L☉ |
Surface gravity (log g) | 2.54 [6] cgs |
Temperature | 4,693+27 −266 [1] K |
Metallicity [Fe/H] | −0.03 [6] dex |
Rotational velocity (v sin i) | < 1.0 [7] km/s |
Age | 2.8 [8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Eta Scuti, Latinized from η Scuti, is a single [10] star in the southern constellation of Scutum, near the constellation border with Aquila. Eta Scuti was a latter designation of 9 Aquilae before the official constellation borders were set in 1922. [11] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of +4.83. [2] This object is located approximately 213 light-years from the Sun based on parallax, and is moving closer with a radial velocity of −92 km/s. [1]
This is an aging giant star with a stellar classification of K1-III. [4] After exhausting the supply of hydrogen at its core, the star cooled and expanded until currently it has 12 [1] times the girth of the Sun. It is a red clump giant, which indicates it is presently on the horizontal branch and is generating energy through core helium fusion. [3] The star is about 2.8 billion years old [8] with 1.5 times the mass of the Sun. [6] It is radiating 63 [1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,693 K. [1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scutum |
Right ascension | 18h 57m 03.67027s [1] |
Declination | −5° 50′ 46.7305″ [1] |
Apparent magnitude (V) | 4.83 [2] |
Characteristics | |
Evolutionary stage | horizontal branch [3] |
Spectral type | K1-III [4] |
U−B color index | +1.02 [5] |
B−V color index | +1.08 [5] |
Astrometry | |
Radial velocity (Rv) | −92.22±0.16 [1] km/s |
Proper motion (μ) |
RA: +61.545
[1]
mas/
yr Dec.: −41.429 [1] mas/ yr |
Parallax (π) | 15.2960 ± 0.1740 mas [1] |
Distance | 213 ± 2
ly (65.4 ± 0.7 pc) |
Absolute magnitude (MV) | 0.87 [2] |
Details | |
Mass | 1.50 [6] M☉ |
Radius | 11.97+0.18 −0.13 [1] R☉ |
Luminosity | 62.7±0.8 [1] L☉ |
Surface gravity (log g) | 2.54 [6] cgs |
Temperature | 4,693+27 −266 [1] K |
Metallicity [Fe/H] | −0.03 [6] dex |
Rotational velocity (v sin i) | < 1.0 [7] km/s |
Age | 2.8 [8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Eta Scuti, Latinized from η Scuti, is a single [10] star in the southern constellation of Scutum, near the constellation border with Aquila. Eta Scuti was a latter designation of 9 Aquilae before the official constellation borders were set in 1922. [11] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of +4.83. [2] This object is located approximately 213 light-years from the Sun based on parallax, and is moving closer with a radial velocity of −92 km/s. [1]
This is an aging giant star with a stellar classification of K1-III. [4] After exhausting the supply of hydrogen at its core, the star cooled and expanded until currently it has 12 [1] times the girth of the Sun. It is a red clump giant, which indicates it is presently on the horizontal branch and is generating energy through core helium fusion. [3] The star is about 2.8 billion years old [8] with 1.5 times the mass of the Sun. [6] It is radiating 63 [1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,693 K. [1]