Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Camelopardalis |
Right ascension | 06h 40m 32.25255s [1] |
Declination | +71° 44′ 55.6296″ [1] |
Apparent magnitude (V) | 5.86±0.01 [2] |
Characteristics | |
Spectral type | G9 III [3] or K0 III [4] |
B−V color index | +1.19 [5] |
Astrometry | |
Radial velocity (Rv) | −24.02±0.19 [6] km/s |
Proper motion (μ) |
RA: +4.653
mas/
yr
[1] Dec.: +11.103 mas/ yr [1] |
Parallax (π) | 4.1248 ± 0.0376 mas [1] |
Distance | 791 ± 7
ly (242 ± 2 pc) |
Absolute magnitude (MV) | −0.98 [7] |
Details | |
Mass | 5.64±1.82 [8] M☉ |
Radius | 27.3±0.6 [1] R☉ |
Luminosity | 399±7 [1] L☉ |
Surface gravity (log g) | 2.34±0.11 [8] cgs |
Temperature | 4,675±92 [8] K |
Metallicity [Fe/H] | +0.12±0.05 [8] dex |
Rotational velocity (v sin i) | 1.5±1.2 [9] km/s |
Age | 339+78 −63 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 46509, also designated as HR 2396, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a yellowish-orange hued point of light with an apparent magnitude of 5.86. [2] The object is located relatively far at a distance of 791 light-years based on Gaia DR3 parallax measurements, [1] but it is drifting closer with a heliocentric radial velocity of −24.02 km/s. [6] At its current distance, HD 46509's brightness is diminished by interstellar extinction of 0.31 magnitudes and it has an absolute magnitude of −0.98. [7]
HD 46509 has a stellar classification of either G9 III or K0 III, [3] [4] with both classes indicating that it is an evolved red giant. It is estimated to be 339 million years old, [8] enough time for it to cool and expand to 27.3 times the radius of the Sun. [1] HD 46509 has about 5.6 times the mass of the Sun [8] and it radiates 399 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 4,675 K. [8] It is metal enriched with an iron abundance 132% that of the Sun's ([Fe/H] = +0.12) [8] and like most giant stars, it spins slowly with a projected rotational velocity of approximately 1.5 km/s. [9]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Camelopardalis |
Right ascension | 06h 40m 32.25255s [1] |
Declination | +71° 44′ 55.6296″ [1] |
Apparent magnitude (V) | 5.86±0.01 [2] |
Characteristics | |
Spectral type | G9 III [3] or K0 III [4] |
B−V color index | +1.19 [5] |
Astrometry | |
Radial velocity (Rv) | −24.02±0.19 [6] km/s |
Proper motion (μ) |
RA: +4.653
mas/
yr
[1] Dec.: +11.103 mas/ yr [1] |
Parallax (π) | 4.1248 ± 0.0376 mas [1] |
Distance | 791 ± 7
ly (242 ± 2 pc) |
Absolute magnitude (MV) | −0.98 [7] |
Details | |
Mass | 5.64±1.82 [8] M☉ |
Radius | 27.3±0.6 [1] R☉ |
Luminosity | 399±7 [1] L☉ |
Surface gravity (log g) | 2.34±0.11 [8] cgs |
Temperature | 4,675±92 [8] K |
Metallicity [Fe/H] | +0.12±0.05 [8] dex |
Rotational velocity (v sin i) | 1.5±1.2 [9] km/s |
Age | 339+78 −63 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 46509, also designated as HR 2396, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a yellowish-orange hued point of light with an apparent magnitude of 5.86. [2] The object is located relatively far at a distance of 791 light-years based on Gaia DR3 parallax measurements, [1] but it is drifting closer with a heliocentric radial velocity of −24.02 km/s. [6] At its current distance, HD 46509's brightness is diminished by interstellar extinction of 0.31 magnitudes and it has an absolute magnitude of −0.98. [7]
HD 46509 has a stellar classification of either G9 III or K0 III, [3] [4] with both classes indicating that it is an evolved red giant. It is estimated to be 339 million years old, [8] enough time for it to cool and expand to 27.3 times the radius of the Sun. [1] HD 46509 has about 5.6 times the mass of the Sun [8] and it radiates 399 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 4,675 K. [8] It is metal enriched with an iron abundance 132% that of the Sun's ([Fe/H] = +0.12) [8] and like most giant stars, it spins slowly with a projected rotational velocity of approximately 1.5 km/s. [9]