Iota Coronae Borealis

{{Short description|Binary star system in the constellation Corona Borealis}}

{{Starbox begin

| name = ι Coronae Borealis

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Corona Borealis

| ra = {{RA|16|01|26.56492}}

| dec = {{DEC|+29|51|03.8194}}

| appmag_v = 4.96

}}

{{Starbox character

| class = {{nowrap|A0 IIIp(HgMnEu)s}}

| b-v = −0.06

| u-b = −0.15

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−20.8|0.4}}

| prop_mo_ra = −38.817

| prop_mo_dec = −7.016

| parallax = 8.7701

| p_error = 0.0857

| parallax_footnote =

| absmag_v = +0.08

}}

{{Starbox orbit

| reference =

| period_unitless = 35.474 d

| eccentricity = 0.56

| periastron = 2441566.96 JD

| periarg = 156

| k1 = 2.3

}}

{{Starbox detail

| source =

| component1 = ι CrB A

| mass =

| radius =

| luminosity = 90

| temperature = {{Val|10727|278|fmt=commas}}

| gravity = {{Val|3.84|0.16}}

| metal_fe = {{Val|−0.01|0.12}}

| rotational_velocity = 18

| age_myr =

}}

{{Starbox catalog

| names = ι CrB, 14 CrB, BD+30°2738, HD 143807, HIP 78493, HR 5971, SAO 84152

}}

{{Starbox reference

| Simbad = iot+CrB

}}

Iota Coronae Borealis, Latinized from ι Coronae Borealis, is a binary star system in the constellation Corona Borealis. It is visible to the naked eye with a combined apparent visual magnitude of is 4.96. Based upon an annual parallax shift of {{val|8.8|ul=mas}} as seen from the Earth, it is located about 372 light years from the Sun.

This is a single-lined spectroscopic binary with an orbital period of 35.5 days and an eccentricity of 0.56. The visible member, component A, has a stellar classification of {{nowrap|A0 IIIp(HgMnEu)s}}, indicating it is a chemically peculiar mercury-manganese star with narrow absorption lines. The secondary member, component B, appears to be an A-type star.

References

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{{cite simbad

| title=iot CrB

| access-date=2017-05-05 | postscript=. | mode=cs2 }}

}}

Category:A-type giants

Category:Mercury-manganese stars

Category:Spectroscopic binaries

Category:Corona Borealis

Coronae Borealis, Iota

Category:Durchmusterung objects