Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation
Pisces
Right ascension
23h 42m 02.80612s[1]
Declination
+01° 46′ 48.1484″[1]
Apparent magnitude (V)
4.49[2]
Characteristics
Spectral type
A7 V[3]
U−B color index
+0.09[2]
B−V color index
+0.20[2]
Astrometry
Radial velocity (Rv)
6.7[4] km/s
Proper motion (μ)
RA: −129.70[1] mas/yr Dec.: −154.80[1] mas/yr
Parallax (π)
30.59 ± 0.19 mas[1]
Distance
106.6 ± 0.7 ly (32.7 ± 0.2 pc)
Absolute magnitude (MV)
+1.92[5]
Details
Mass
1.806[3]M☉
Radius
2.0403±0.0451[3]R☉
Luminosity
13.3897±0.1692[3]L☉
Surface gravity (log g)
4.08[4] cgs
Temperature
7,734±80[3] K
Metallicity [Fe/H]
0.02[4] dex
Rotational velocity (v sin i)
70[6] km/s
Age
583±20[6] Myr
Other designations
λ Psc, 18 Piscium, BD+00° 5037, FK5 1620, HD 222603, HIP 116928, HR 8984, SAO 128336[7]
Database references
SIMBAD
data
Lambda Piscium, Latinized from λ Piscium, is a solitary,[8] white-hued star in the zodiac constellation of Pisces. With an apparent visual magnitude of 4.49,[2] it is visible to the naked eye, forming the southeast corner of the "Circlet" asterism in Pisces. Based upon a measured annual parallax shift of 30.59 mas as seen from Earth,[1] it is located 107 light years distant from the Sun. Lambda Piscium is a member of the Ursa Major Stream, lying among the outer parts, or corona, of this moving group of stars that roughly follow a common heading through space.[9]
This well-studied star[4] has a stellar classification A7 V,[3] indicating it is an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has 1.8 times the mass of the Sun and double the Sun's radius. The star is radiating 13.3 times the Sun's luminosity from its photosphere at an effective temperature of 7,734 K.[3] Lambda Piscium is around 583 million years old and is spinning with a projected rotational velocity of 70 km/s.[6]
^ abcdefCite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
^ abcdCite error: The named reference Argue1966 was invoked but never defined (see the help page).
^ abcdefgCite error: The named reference Boyajian2013 was invoked but never defined (see the help page).
^ abcdCite error: The named reference Gebran2016 was invoked but never defined (see the help page).
^Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ abcCite error: The named reference Zorec2012 was invoked but never defined (see the help page).
^Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
^Cite error: The named reference Chupina2006 was invoked but never defined (see the help page).
LambdaPiscium, Latinized from λ Piscium, is a solitary, white-hued star in the zodiac constellation of Pisces. With an apparent visual magnitude of 4...
1650). /ælˈfɛkə/ Andromeda α Andromedae Aa Alpheratz /ælˈfɪəræts/ Pisces η Piscium A Alpherg /ˈælfɜːrɡ/ Draco μ Draconis A Alrakis From Arabic: الراقص ar-rāqiṣ...
61 Lambda Hydrae Binary star system 3.61 Delta Muscae Binary star system 3.61 HD 63032 Binary star system 3.62 Delta Arae Star 3.620 Eta Piscium Binary...
Chandrasekhar, T.; Ashok, N. M. (1995). "Angular Diameter of Carbon Star Tx-Piscium from Lunar Occultation Observations in the Near Infrared". Journal of Astrophysics...
observations of the selected Algol-type binaries - IV. V799 Cassiopeiae, BX Piscium and HD 172189". Monthly Notices of the Royal Astronomical Society. 392...
Indi Ba 55,656 Brown dwarf LHS 6343 C 55,978 Epsilon Indi Bb 57,050 54 Piscium B 57,050 2MASS J1126−5003 57,193.5 UGPS J0521+3640 57,193.5 Wolf 1130 C...
Bouy, H. (2007-06-01). "The young, wide and very low mass visual binary Lambda Orionis 167". Astronomy and Astrophysics. 468: L5–L8. arXiv:0704.2469. Bibcode:2007A&A...