Iota Delphini

{{Short description|A-type giant star in the constellation Delphinus}}

{{Starbox begin

|name=Iota Delphini}}

{{Starbox image

| image=

{{Location mark

|image=Delphinus constellation map.svg|alt=|float=center|width=240

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=Iota Delphini

|x=408|y=530

}}

|caption=Location of Iota Delphini (circled)

}}

{{Starbox observe

| constell = Delphinus

| epoch = J2000

| ra = {{RA|20|37|49.1198}}

| dec = {{DEC|+11|22|39.631}}

| appmag_v = 5.42{{±|0.01}}

}}

{{Starbox character

| class = A1 IV

| b-v = +0.03

| u-b = +0.03

}}

{{Starbox astrometry

| radial_v = −3.9{{±|0.9}}

| prop_mo_ra = +38.867

| prop_mo_dec = −8.609

| parallax = 16.6478

| p_error = 0.0728

| parallax_footnote =

| pm_footnote =

| absmag_v = 1.62

}}

{{Starbox orbit

|reference=

|period_unitless=11.039 days

|eccentricity=0.23

|periarg=61.8

|periastron=2422139.862

|k1=26.0

}}

{{Starbox detail

|mass=2.47

|temperature=9,130

|luminosity=23

|radius=1.9

|gravity=4.29

|metal_fe=−0.25

|rotational_velocity=28

|age_myr=225

}}

{{Starbox catalog

| names ={{odlist|B = ι Del|F = 5 Delphini|BD = +10°4339|HD = 196544|HIP = 101800|SAO = 106322|HR = 7883|GC = 28711}}

}}

{{Starbox reference

|Simbad=iot+Del }}

Iota Delphini (ι Del, ι Delphini) is a star in the constellation Delphinus. It has an apparent magnitude of about 5.4, meaning that it is just barely visible to the naked eye. Based upon parallax measurements made by the Gaia spacecraft, this star is located at a distance of 196 light years.

Iota Delphini's spectral type is A1IV, meaning it is an A-type subgiant.{{cite web |last1=Allen |first1=J. S. |title=The Classification of Stellar Spectra |website=UCL Department of Physics and Astronomy: Astrophysics Group |url=http://www.star.ucl.ac.uk/~pac/spectral_classification.html |accessdate=1 January 2014}} Observations of the star's spectrum reveal a periodic Doppler shift. This means that Iota Delphini is a spectroscopic binary with a period of 11 days and an eccentricity of 0.23. However, almost no information is known about the companion star.

Iota Delphini appears to be an Am star, also known as a metallic-line star. These types of stars have spectra indicating varying amounts of metals, like iron.[http://www.daviddarling.info/encyclopedia/A/Am_star.html Am star] {{Webarchive|url=https://web.archive.org/web/20170804053755/http://www.daviddarling.info/encyclopedia/A/Am_star.html |date=2017-08-04 }}, The Internet Encyclopedia of Science, David Darling. Accessed on line August 14, 2008. Observations of Iota Delphini's spectrum have shown lower amounts of calcium and higher amounts of iron than usual.

References

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}}

Category:A-type subgiants

Delphini, 05

Category:Am stars