22 Scorpii

{{about-distinguish|i Scorpii|iota Scorpii{{!}}ι Scorpii}}

{{Starbox begin

| name = 22 Scorpii

}}{{Starbox observe

| epoch = J2000

| constell = Scorpius

| ra = {{RA|16|30|12.47527}}

| dec = {{DEC|−25|06|54.7966}}

| appmag_v = 4.78

}}

{{Starbox character

| type = main sequence

| class = B3 V

| b-v =

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v =

| prop_mo_ra = −4.192

| prop_mo_dec = −26.975

| parallax = 7.9402

| p_error = 0.1848

| parallax_footnote =

| absmag_v = −0.72

}}

{{Starbox detail

| source =

| mass = 4.4

| radius = 3.4

| luminosity = 601

| gravity = 4.5

| temperature = 16,683

| metal_fe = 0.66

| rotational_velocity = {{Val|169|4}}

| age_myr = 8

}}

{{Starbox catalog

| names = {{odlist | B=i Sco | F=22 Sco | CD=−24°12695 | HD=148605 | HIP=80815 | HR=6141 | SAO=184429 }}

}}

{{Starbox reference

| Simbad = 22+Sco

}}

22 Scorpii (i Scorpii) is a single star in the southern zodiac constellation of Scorpius, about one degree from Antares. It is faintly visible to the naked eye with an apparent visual magnitude of 4.78. The distance to this star is estimated to be around 411 light years, as derived from its annual parallax shift of {{Val|7.9|0.2|ul=mas}}. The star is embedded in, or adjacent to, the diffuse nebulous cloud IC 4605 located in the western regions of the Rho Ophiuchi cloud complex.

File:IC_4605_reflection_nebula_in_32_inch_Schulman_telescope.jpg]]

22 Scorpii is a B-type main-sequence star with a stellar classification of B3 V. It is ten million years old and has a high rate of spin with a projected rotational velocity of 169 km/s. The star has about 4.4 times the mass of the Sun and is radiating 601 times the Sun's luminosity from its photosphere at an effective temperature of {{val|fmt=commas|16683|ul=K}}.

References

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External links

{{cite web|title=22 Scorpii - Wolfram Alpha|url=http://www.wolframalpha.com/input/?i=22+Scorpii|work=Wolfram Alpha}}
{{cite web|title=22 Scorpii (HIP 80815)|url=http://www.astrostudio.org/xhip.php?hip=80815|archive-url=https://archive.today/20130414095319/http://www.astrostudio.org/xhip.php?hip=80815|archive-date=2013-04-14|work=Ashland Astronomy Studio|access-date=2012-08-19}}

Category:B-type main-sequence stars

Category:Scorpius

Scorpii, i

Category:Durchmusterung objects