1 Boötis

{{Starbox observe 2s

| epoch = J2000

| constell = Boötes

| component1 = A

| ra1 = {{RA|13|40|40.46926}}

| dec1 = {{DEC|+19|57|20.5839}}

| appmag_v1 = 5.78

| component2 = A

| ra2 = {{RA|13|40|40.46926}}

| dec2 = {{DEC|+19|57|20.5839}}

| appmag_v2 = 9.60

}}

{{Starbox character

| class = A1 V + Am

| b-v = +0.02

| u-b = +0.02

| variable =

}}

{{Starbox astrometry

| component1 = A

| radial_v = −26

| prop_mo_ra = −46.723

| prop_mo_dec = +23.172

| parallax = 10.3308

| p_error = 0.0533

| parallax_footnote =

| absmag_v = +0.79

| component2 = B

| radial_v2 =

| prop_mo_ra2 = −44,301

| prop_mo_dec2 = +28.326

| parallax2 = 10.4702

| p_error2 = 0.0232

| parallax_footnote2 =

| absmag_v2 =

}}

{{Starbox detail

| component1 = 1 Boö A

| mass = {{val|2.54|0.09}}

| radius = 2.5

| luminosity = 56

| temperature = 9,863

| metal_fe =

| gravity = 3.90

| rotational_velocity = 60

| age_myr = 323

| component2 = 1 Boö B

| mass2 = 1.02

| radius2 = 1.1

| luminosity2 = 0.76

| temperature2 = 5,370

| gravity2 = 4.28

}}

{{Starbox catalog

| names={{odlist | BD=+20°2858 | HD=119055 | HIP=66727 | HR=5144 | SAO=82942 | CCDM=J13407+1958 | WDS=J13407+1957 }}

}}

{{Starbox reference

| Simbad=HD+119055

| Simbad2=1+Boo+B |sn2=B

| ARICNS =

}}

1 Boötis (1 Boo) is a binary star system in the northern constellation of Boötes, located 318 light years away from the Sun. It is visible to the naked eye as a dim, white-hued star with a combined apparent visual magnitude of 5.71. The pair had an angular separation of {{Val|4.660|ul=arcsecond}} as of 2008. It is moving closer to the Earth with a heliocentric radial velocity of −26 km/s.

The magnitude 5.78 primary component is an A-type main-sequence star with a stellar classification of A1 V. This star has 2.5 times the mass of the Sun and is radiating 56 times the Sun's luminosity from its photosphere at an effective temperature of 9,863 K. It is 323 million years old and is spinning with a projected rotational velocity of 60 km/s.

The system is a source for X-ray emission, which is most likely coming from the companion star. This magnitude 9.60 component is a possible pre-main sequence star with a mass similar to the Sun. It is radiating 76% of the Sun's luminosity at an effective temperature of 6,370 K.

References

{{Reflist|refs=

{{citation | display-authors=1 | last1=Hubrig | first1=S. | last2=Le Mignant | first2=D. | last3=North | first3=P. | last4=Krautter | first4=J. | title=Search for low-mass PMS companions around X-ray selected late B stars | journal=Astronomy and Astrophysics | volume=372 | pages=152–164 | date=June 2001 | doi=10.1051/0004-6361:20010452 | bibcode=2001A&A...372..152H |arxiv = astro-ph/0103201 | s2cid=17507782 }}

{{cite conference |mode=cs2 | last=Evans | first=D. S. | date=June 24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | book-title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (June 20–24) | location=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E }}

{{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R |arxiv = astro-ph/0610785 |date=February 2007| s2cid=18475298 }}

{{citation | last1=Lutz | first1=T. E. | last2=Lutz | first2=J. H.|author2-link= Julie Lutz | title=Spectral classification and UBV photometry of bright visual double stars | journal=Astronomical Journal | volume=82 | pages=431–434 | doi=10.1086/112066 | bibcode=1977AJ.....82..431L |date=June 1977| doi-access=free }}

{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 | s2cid=14878976 }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205144 HR 5144]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J13407%2b1958A CCDM J13407+1958]
[http://aladin.u-strasbg.fr/AladinPreview?-c=*+++1+Boo&ident=*+++1+Boo&submit=Aladin+previewer Image 1 Boötis]

Category:A-type main-sequence stars

Category:Double stars

Category:Boötes

Category:Durchmusterung objects