Iota2 Scorpii

{{hatnote|For other stars with this Bayer designation, see ι Scorpii}}

{{Starbox begin

| name = ι² Scorpii

}}

{{Starbox observe

| epoch = J2000

| constell = Scorpius

| ra = {{RA|17|50|11.11291}}

| dec = {{DEC|−40|05|25.5629}}

| appmag_v = +4.82

}}

{{Starbox character

| class = A2 Ib or A6 Ib

| b-v = +0.25

| u-b = +0.19

| variable =

}}

{{Starbox astrometry

| radial_v = −10.2

| prop_mo_ra = +3.90

| prop_mo_dec = −2.42

| parallax = 1.28

| p_error = 0.24

| parallax_footnote =

| absmag_v = −4.59

}}

{{Starbox detail

| source =

| mass = {{Val|8.8|0.2}}

| radius =

| luminosity = 5,798

| gravity =

| temperature = 6,372

| metal_fe =

| rotational_velocity =

| age_myr = {{Val|29.8|4.3}}

}}

{{Starbox catalog

| names = ι² Sco, CD−40° 11886, HD 161912, HIP 87294, HR 6631, SAO 228466 .

}}

{{Starbox reference

| Simbad = iot02+Sco

}}

ι² Scorpii, Latinised as Iota² Scorpii, is a single star in tail of the zodiac constellation of Scorpius. It has an apparent visual magnitude of +4.82, and is visible to the naked eye. Because of parallax measurement errors, the distance to this star is only approximately known: it lies around 2,500 light years away from the Sun. It has a visual companion, a magnitude 11.0 star at an angular separation of 31.60 arcseconds along a position angle of 36°, as of 2000.

In the literature, there are two different stellar classifications for this star: A2 Ib and A6 Ib. In either case it is an A-type supergiant star with an estimated age of 30 million years and a mass 8.8 times that of the Sun. It shines with a luminosity 5,798 times the Sun's from an outer atmosphere that has an effective temperature of 6,372 K. As with other stars of its type, ι² Scorpii varies slightly in brightness, showing an amplitude of 0.05 in magnitude.

References

{{reflist|refs=

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{{citation

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| volume=4541 | page=1 | date=December 1997

| bibcode=1997IBVS.4541....1A | postscript=. }}

{{cite simbad

| title=iot02 Sco

| access-date=2016-09-20 }}

}}

External links

{{citation

| first1=James B. | last1=Kaler

| title=Iota-2 Scorpii | work=Stars

| publisher=University of Illinois

| url=http://stars.astro.illinois.edu/sow/iota2sco.html

| access-date=2016-09-20 | postscript=. }}

Scorpii, Iota2

Category:Scorpius

Category:A-type supergiants

087294

6631

161912

Category:Durchmusterung objects