Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Serpens |
Right ascension | 15h 51m 15.90985s [3] |
Declination | +20° 58′ 40.5166″ [3] |
Apparent magnitude (V) | 4.78 [4] |
Characteristics | |
Spectral type | K4.5III [5] |
U−B color index | +1.88 [4] |
B−V color index | +1.54 [4] |
Astrometry | |
Radial velocity (Rv) | −61.96 [6] km/s |
Proper motion (μ) |
RA: −53.32
[3]
mas/
yr Dec.: +18.87 [3] mas/ yr |
Parallax (π) | 8.70 ± 0.30 mas [3] |
Distance | 370 ± 10
ly (115 ± 4 pc) |
Absolute magnitude (MV) | −0.56 [7] |
Details | |
Radius | 47.84+0.49 −1.19 [8] R☉ |
Luminosity | 491.9±22.3 [8] L☉ |
Surface gravity (log g) | 1.68 [9] cgs |
Temperature | 3,930+50 −20 [8] K |
Metallicity [Fe/H] | −0.08 [7] dex |
Other designations | |
Database references | |
SIMBAD | data |
Rho Serpentis, Latinized from ρ Serpentis, is a single [11] star in the Caput section of the equatorial Serpens constellation. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.78. [4] The distance to this star is approximately 375 light years based on parallax, [3] but it is drifting closer to the Sun with a radial velocity of −62 km/s. [6]
This is an aging giant star with a stellar classification of K4.5III. [5] It is a suspected variable star of unknown type, with an I-band brightness ranging from 3.29 down to 3.44 magnitude. [12] Hipparcos photometry revealed a microvariability with a frequency of 0.17017 cycles per day and an amplitude of 0.0080. [2] With the supply of hydrogen exhausted at its core, it has expanded and now has 48 [8] times the Sun's girth. The star is radiating 492 [8] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,930 K. [8]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Serpens |
Right ascension | 15h 51m 15.90985s [3] |
Declination | +20° 58′ 40.5166″ [3] |
Apparent magnitude (V) | 4.78 [4] |
Characteristics | |
Spectral type | K4.5III [5] |
U−B color index | +1.88 [4] |
B−V color index | +1.54 [4] |
Astrometry | |
Radial velocity (Rv) | −61.96 [6] km/s |
Proper motion (μ) |
RA: −53.32
[3]
mas/
yr Dec.: +18.87 [3] mas/ yr |
Parallax (π) | 8.70 ± 0.30 mas [3] |
Distance | 370 ± 10
ly (115 ± 4 pc) |
Absolute magnitude (MV) | −0.56 [7] |
Details | |
Radius | 47.84+0.49 −1.19 [8] R☉ |
Luminosity | 491.9±22.3 [8] L☉ |
Surface gravity (log g) | 1.68 [9] cgs |
Temperature | 3,930+50 −20 [8] K |
Metallicity [Fe/H] | −0.08 [7] dex |
Other designations | |
Database references | |
SIMBAD | data |
Rho Serpentis, Latinized from ρ Serpentis, is a single [11] star in the Caput section of the equatorial Serpens constellation. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.78. [4] The distance to this star is approximately 375 light years based on parallax, [3] but it is drifting closer to the Sun with a radial velocity of −62 km/s. [6]
This is an aging giant star with a stellar classification of K4.5III. [5] It is a suspected variable star of unknown type, with an I-band brightness ranging from 3.29 down to 3.44 magnitude. [12] Hipparcos photometry revealed a microvariability with a frequency of 0.17017 cycles per day and an amplitude of 0.0080. [2] With the supply of hydrogen exhausted at its core, it has expanded and now has 48 [8] times the Sun's girth. The star is radiating 492 [8] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,930 K. [8]