Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 00h 48m 40.9443s [1] |
Declination | +07° 35′ 06.2949″ [1] |
Apparent magnitude (V) | +4.416 [2] |
Characteristics | |
Spectral type | K4 IIIb [3] |
U−B color index | +1.831 [2] |
B−V color index | +1.500 [2] |
Astrometry | |
Radial velocity (Rv) | +32.45±0.18 [4] km/s |
Proper motion (μ) |
RA: +81.994
mas/
yr
[1] Dec.: −50.232 mas/ yr [1] |
Parallax (π) | 10.8577 ± 0.1787 mas [1] |
Distance | 300 ± 5
ly (92 ± 2 pc) |
Absolute magnitude (MV) | −0.46 [5] |
Details | |
Mass | 1.65 [3] M☉ |
Radius | 38.01+0.71 −0.73 [6] R☉ |
Luminosity | 291.7±13.3 [6] L☉ |
Surface gravity (log g) | 1.88 [1] cgs |
Temperature | 3868±35 [6] K |
Metallicity [Fe/H] | −0.19 [1] dex |
Rotational velocity (v sin i) | 5.5 [4] km/s |
Age | 2.98 [3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Delta Piscium (δ Piscium) is a solitary, [8] orange-hued star in the zodiac constellation of Pisces. It has an apparent visual magnitude of +4.4, [2] so it is bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 10.86 mas, it is around 300 light-years (92 parsecs) from the Sun. [1] The visual magnitude of the star is diminished by an interstellar absorption factor of 0.08 due to interstellar dust. [9]
This is an evolved K-type giant star with a stellar classification of K4 IIIb. [3] It has around 1.65 times the mass of the Sun and, at the age of three billion years, [3] has expanded to 38 [6] times the Sun's radius. The star is radiating 292 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,868 K. [6]
Because Delta Piscium is positioned near the ecliptic, so it is subject to lunar occultations. [10] It has a magnitude 13.99 visual companion at an angular separation of 135.0 arc seconds on a position angle of 12°, as of 2011. [11]
In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism of stars, δ Piscium, ε Piscium, ζ Piscium, μ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, the Chinese name for δ Piscium itself is 外屏一 (Wài Píng yī, English: the First Star of Outer Fence.) [12]
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cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 00h 48m 40.9443s [1] |
Declination | +07° 35′ 06.2949″ [1] |
Apparent magnitude (V) | +4.416 [2] |
Characteristics | |
Spectral type | K4 IIIb [3] |
U−B color index | +1.831 [2] |
B−V color index | +1.500 [2] |
Astrometry | |
Radial velocity (Rv) | +32.45±0.18 [4] km/s |
Proper motion (μ) |
RA: +81.994
mas/
yr
[1] Dec.: −50.232 mas/ yr [1] |
Parallax (π) | 10.8577 ± 0.1787 mas [1] |
Distance | 300 ± 5
ly (92 ± 2 pc) |
Absolute magnitude (MV) | −0.46 [5] |
Details | |
Mass | 1.65 [3] M☉ |
Radius | 38.01+0.71 −0.73 [6] R☉ |
Luminosity | 291.7±13.3 [6] L☉ |
Surface gravity (log g) | 1.88 [1] cgs |
Temperature | 3868±35 [6] K |
Metallicity [Fe/H] | −0.19 [1] dex |
Rotational velocity (v sin i) | 5.5 [4] km/s |
Age | 2.98 [3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Delta Piscium (δ Piscium) is a solitary, [8] orange-hued star in the zodiac constellation of Pisces. It has an apparent visual magnitude of +4.4, [2] so it is bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 10.86 mas, it is around 300 light-years (92 parsecs) from the Sun. [1] The visual magnitude of the star is diminished by an interstellar absorption factor of 0.08 due to interstellar dust. [9]
This is an evolved K-type giant star with a stellar classification of K4 IIIb. [3] It has around 1.65 times the mass of the Sun and, at the age of three billion years, [3] has expanded to 38 [6] times the Sun's radius. The star is radiating 292 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,868 K. [6]
Because Delta Piscium is positioned near the ecliptic, so it is subject to lunar occultations. [10] It has a magnitude 13.99 visual companion at an angular separation of 135.0 arc seconds on a position angle of 12°, as of 2011. [11]
In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism of stars, δ Piscium, ε Piscium, ζ Piscium, μ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, the Chinese name for δ Piscium itself is 外屏一 (Wài Píng yī, English: the First Star of Outer Fence.) [12]
{{
cite web}}
: CS1 maint: postscript (
link)