Lambda1 Sculptoris

{{for|other star systems with this Bayer designation|Lambda Sculptoris{{!}}λ Sculptoris}}

{{Starbox begin

| name = Lambda¹ Sculptoris

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Sculptor

| ra = {{RA|00|42|42.89190}}

| dec = {{DEC|−38|27|48.5416}}

| appmag_v = +6.05 {{nowrap|(6.612 + 7.041)}}

}}

{{Starbox character

| class = B9.5 V + A9(V)

| b-v = −0.03

| u-b = −0.13

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|11.1|0.6}}

| prop_mo_ra = +2.56

| prop_mo_dec = −6.72

| parallax = 6.89

| p_error = 0.71

| parallax_footnote =

| absmag_v = +0.27

}}

{{Starbox detail

| source =

| component1 = λ¹ Scl A

| mass = {{Val|2.83|0.13}}

| radius =

| luminosity = 94

| temperature = 10,351

| gravity =

| metal_fe =

| rotational_velocity = 35

| age_myr =

}}

{{Starbox catalog

| names = {{odlist|B=λ¹ Scl | CD=−39°175 | HD=4065 | HIP=3356 | HR=185 | SAO=192690 | WDS=J00427-3828AB }}

}}

{{Starbox reference

| Simbad = lam01+Scl

}}

Lambda¹ Sculptoris, Latinised from λ¹ Sculptoris, is a double star system in the southern constellation of Sculptor. It is close to the lower limit of visibility to the naked eye, with a combined apparent visual magnitude of +6.05. Based upon an annual parallax shift of 6.89 mas as measured from Earth, it is located roughly 470 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.026 due to interstellar dust.

The brighter star, component A, has a visual magnitude of 6.6, while the secondary, component B, is magnitude 7.0. As of 2000, the pair had an angular separation of 0.737 arcsecond along a position angle of 14.0°. Component A is a blue-white-hued B-type main-sequence star with a stellar classification of B9.5 V. It has 2.8 times the mass of the Sun and radiates 94 times the solar luminosity from its photosphere at an effective temperature of {{val|10351|fmt=commas|ul=K}}. The mass ratio is 0.609, meaning the secondary is only 60.9% as massive as the primary.

References

{{reflist|refs=

{{citation

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| last1=van Leeuwen | first1=F.

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | date=2007

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}

{{citation

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| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

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| doi=10.1051/0004-6361:20064889 | bibcode=2006A&A...458..293P

| arxiv=astro-ph/0607567 | s2cid=18219735 | postscript=. }}

{{citation

| last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.

| title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project

| journal=Astronomy & Astrophysics

| volume=546 | id=A61 | pages=14 | date=October 2012

| doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D

| arxiv=1208.3048 | s2cid=59451347 | postscript=. }}

{{citation

| last1=Zorec | first1=J. | last2=Royer | first2=F.

| title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities

| journal=Astronomy & Astrophysics

| volume=537 | page=A120 | date=January 2012

| doi=10.1051/0004-6361/201117691 | bibcode=2012A&A...537A.120Z

| arxiv=1201.2052 | s2cid=55586789 | postscript=. }}

{{citation

| title=Three-colour photometry of early-type stars near the galactic poles

| last1=Westerlund | first1=B. E.

| journal=Monthly Notices of the Royal Astronomical Society

| volume=127 | page=83 | year=1963 | postscript=.

| doi=10.1093/mnras/127.1.83 | bibcode=1963MNRAS.127...83W | doi-access=free }}

{{citation

| title=Michigan catalogue of two-dimensional spectral types for the HD stars

| volume=3 | last1=Houk | first1=Nancy | postscript=.

| location=Ann Arbor, Michigan

| publisher=Dept. of Astronomy, University of Michigan

| date=1979 | bibcode=1982mcts.book.....H }}

{{citation

| last1=Fabricius | first1=C. | last2=Makarov | first2=V. V.

| title=Two-colour photometry for 9473 components of close Hipparcos double and multiple stars

| journal=Astronomy and Astrophysics

| volume=356 | pages=141–145 | date=April 2000

| bibcode=2000A&A...356..141F | postscript=. }}

{{citation

| title=lam01 Scl – Double or multiple star

| work=SIMBAD Astronomical Database

| publisher=Centre de Données astronomiques de Strasbourg

| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=lam01+Scl

| accessdate=2017-05-30 | postscript=. }}

{{cite journal

| doi=10.3847/1538-3881/ac2ee0

| title=Astrometric Mass Ratios of 248 Long-period Binary Stars Resolved in Hipparcos and Gaia EDR3

| journal=The Astronomical Journal | volume=162 | issue=6 | page=260

| arxiv=2109.11951 | bibcode=2021AJ....162..260M | s2cid=237635330 | doi-access=free

}}

{{cite journal|bibcode=1980ApJS...44..489B|title=Scanner studies of composite spectra. I – Dwarfs|journal=Astrophysical Journal Supplement Series|volume=44|pages=489|last1=Beavers|first1=W. I.|last2=Cook|first2=D. B.|year=1980|doi=10.1086/190702|doi-access=free}}

}}

Category:B-type main-sequence stars

Category:Double stars

Sculptoris, Lambda-1

Category:Sculptor (constellation)

004065

003356

0185

Category:A-type main-sequence stars

Category:Durchmusterung objects