Lambda Piscis Austrini

{{Starbox begin

| name = Lambda Piscis Austrini

}}

{{Starbox image

| image =

File:Piscis_Austrinus_IAU.svg

12px

| caption=Location of λ Piscis Austrini (circled)

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Piscis Austrinus

| ra = {{RA|22|14|18.75029}}

| dec = {{DEC|−27|46|00.8756}}

| appmag_v = +5.42

}}

{{Starbox character

| class = B7 V

| b-v = −0.12

| u-b =

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = −6.20

| prop_mo_ra = +23.889

| prop_mo_dec = +2.562

| parallax = 6.5148

| p_error = 0.2222

| parallax_footnote =

| absmag_v = −0.13

}}

{{Starbox detail

| source =

| mass = {{Val|3.58|0.08}}

| radius = 4.2

| luminosity = 249

| temperature = 12,023

| gravity =

| metal_fe =

| rotational_velocity = 50

| age_myr = 215

}}

{{Starbox catalog

| names = {{odlist | B=λ PsA | F=16 Piscis Austrini | CPD=−28°7566 | FK5=838 | HD=210934 | HIP=109789 | HR=8478 | SAO=190985 }}

}}

{{Starbox reference

| Simbad = lam+PsA

}}

Lambda Piscis Austrini, Latinized from λ Piscis Austrini, is a solitary star in the southern constellation of Piscis Austrinus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +5.42. Based upon an annual parallax shift of 6.51 mas as measured from Earth, it is located around 500 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.16 due to interstellar dust.

This is a B-type main sequence star with a stellar classification of B7 V. It has an estimated 3.58 times the mass of the Sun and about 4.2 times the Sun's radius. The star is spinning with a projected rotational velocity of 50 km/s and is 76% of the way through its main sequence lifetime. It is radiating 249 times the solar luminosity from its photosphere at an effective temperature of 12,023 K.

Lambda Piscis Austrini is moving through the Galaxy at a speed of 18.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,800 and 29,300 light years from the center of the Galaxy.

Naming

In Chinese, {{lang|zh|羽林軍}} ({{lang|zh-Latn|Yǔ Lín Jūn}}), meaning Palace Guard, refers to an asterism consisting of λ Piscis Austrini, 29 Aquarii, 35 Aquarii, 41 Aquarii, 47 Aquarii, 49 Aquarii, HD 212448, ε Piscis Austrini, 21 Piscis Austrini, 20 Piscis Austrini, υ Aquarii, 68 Aquarii, 66 Aquarii, 61 Aquarii, 53 Aquarii, 50 Aquarii, 56 Aquarii, 45 Aquarii, 58 Aquarii, 64 Aquarii, 65 Aquarii, 70 Aquarii, 74 Aquarii, τ² Aquarii, τ¹ Aquarii, δ Aquarii, 77 Aquarii, 88 Aquarii, 89 Aquarii, 86 Aquarii, 101 Aquarii, 100 Aquarii, 99 Aquarii, 98 Aquarii, 97 Aquarii, 94 Aquarii, ψ³Aquarii, ψ²Aquarii, ψ¹Aquarii, 87 Aquarii, 85 Aquarii, 83 Aquarii, χ Aquarii, ω¹ Aquarii and ω² Aquarii. Consequently, the Chinese name for λ Piscis Austrini itself is {{lang|zh|羽林軍六}} ({{lang|zh-Latn|Yǔ Lín Jūn liù}}, {{langx|en|the Sixth Star of Palace Guard}}.){{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060707.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日] {{Webarchive|url=https://web.archive.org/web/20110521232711/http://aeea.nmns.edu.tw/2006/0607/ap060707.html |date=2011-05-21 }}

References

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{{citation

| title=lam PsA -- Star

| work=SIMBAD Astronomical Database

| publisher=Centre de Données astronomiques de Strasbourg

| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=lam+PsA

| accessdate=2017-05-18 | postscript=. }}

}}

Category:B-type main-sequence stars

Piscis Austrini, Lambda

Category:Piscis Austrinus

Category:Durchmusterung objects