Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Norma |
Right ascension | 16h 03m 12.89783s [1] |
Declination | −49° 13′ 46.9151″ [1] |
Apparent magnitude (V) | 4.65 [2] |
Characteristics | |
Evolutionary stage | horizontal branch |
Spectral type | G8III [3] |
U−B color index | +0.64 [2] |
B−V color index | +0.92 [2] |
Astrometry | |
Radial velocity (Rv) | −0.3±2.8 [4] km/s |
Proper motion (μ) |
RA: 42.05
[1]
mas/
yr Dec.: 9.14 [1] mas/ yr |
Parallax (π) | 14.86 ± 0.25 mas [1] |
Distance | 219 ± 4
ly (67 ± 1 pc) |
Absolute magnitude (MV) | 0.524 [5] |
Details | |
Mass | 2.78 [5] M☉ |
Radius | 11.07+0.23 −0.09 [6] R☉ |
Luminosity | 71.9±3.1 [6] L☉ |
Surface gravity (log g) | 2.84 [5] cgs |
Temperature | 5052+16 −51 [6] K |
Metallicity [Fe/H] | −0.05 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
Eta Normae, Latinized from η Normae, is a single [8] star in the southern constellation of Norma. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.65. [2] The distance to this star is about 219 light years, based on parallax. [1] The Gamma Normids radiate from a position near this star. [9]
This is an aging giant star with a stellar classification of G8III, [3] having exhausted the supply of hydrogen at its core then swollen and cooled off the main sequence. At present it has a diameter of 11 [6] times that of the Sun. It is a red clump [5] giant, meaning it is on the horizontal branch and is generating energy through core helium fusion. The star has 2.78 [5] times the mass of the Sun and is radiating 72 [6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,052 K. [6] It is a source for X-ray emission. [10]
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cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Norma |
Right ascension | 16h 03m 12.89783s [1] |
Declination | −49° 13′ 46.9151″ [1] |
Apparent magnitude (V) | 4.65 [2] |
Characteristics | |
Evolutionary stage | horizontal branch |
Spectral type | G8III [3] |
U−B color index | +0.64 [2] |
B−V color index | +0.92 [2] |
Astrometry | |
Radial velocity (Rv) | −0.3±2.8 [4] km/s |
Proper motion (μ) |
RA: 42.05
[1]
mas/
yr Dec.: 9.14 [1] mas/ yr |
Parallax (π) | 14.86 ± 0.25 mas [1] |
Distance | 219 ± 4
ly (67 ± 1 pc) |
Absolute magnitude (MV) | 0.524 [5] |
Details | |
Mass | 2.78 [5] M☉ |
Radius | 11.07+0.23 −0.09 [6] R☉ |
Luminosity | 71.9±3.1 [6] L☉ |
Surface gravity (log g) | 2.84 [5] cgs |
Temperature | 5052+16 −51 [6] K |
Metallicity [Fe/H] | −0.05 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
Eta Normae, Latinized from η Normae, is a single [8] star in the southern constellation of Norma. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.65. [2] The distance to this star is about 219 light years, based on parallax. [1] The Gamma Normids radiate from a position near this star. [9]
This is an aging giant star with a stellar classification of G8III, [3] having exhausted the supply of hydrogen at its core then swollen and cooled off the main sequence. At present it has a diameter of 11 [6] times that of the Sun. It is a red clump [5] giant, meaning it is on the horizontal branch and is generating energy through core helium fusion. The star has 2.78 [5] times the mass of the Sun and is radiating 72 [6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,052 K. [6] It is a source for X-ray emission. [10]
{{
cite web}}
: CS1 maint: postscript (
link)