9 Cassiopeiae

{{Starbox image

| image=

{{Location mark

|image=Cassiopeia constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=8|mark_link=9 Cas

|x=580|y=448

}}

|caption=Location of 9 Cassiopeiae (circled)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cassiopeia

| ra = {{RA|00|04|13.6625}}

| dec = {{DEC|+62|17|15.591}}

| appmag_v = +5.884

}}

{{Starbox character

| class = A1II-III

| b-v = +0.30

| u-b = +0.29

| variable=

}}

{{Starbox astrometry

| radial_v = {{val|-23.43|0.16}}

| prop_mo_ra = −0.936

| prop_mo_dec = −0.263

| parallax = 1.3781

| p_error = 0.0237

| parallax_footnote =

| dist_pc =

| absmag_v =

}}

{{Starbox detail

| mass = 5.1

| radius = 26

| luminosity = 2,208

| temperature = 7,719

| metal_fe = −0.32

| gravity = 2.08

| rotational_velocity = 33

| age_myr = 25.1

}}

{{Starbox catalog

| names = 9 Cas, HR 9100, HD 225180, BD+61°2586, HIP 330

}}

{{Starbox reference

| Simbad = 9+Cas

}}

9 Cassiopeiae (9 Cas) is a white giant star in the constellation Cassiopeia, about 2,370 light years away.

9 Cassiopeiae is classified as an A1 type giant or bright giant. One study noted peculiarities in the spectrum that could indicate a λ Boötis star, but other researchers have refuted this.

At an age of 25 million years, 9 Cassiopeiae has expanded away from the main sequence after exhausting its core hydrogen and now has a radius about 26 times that of the Sun. With an effective temperature of about {{val|fmt=commas|7700|ul=K}}, it emits more than two thousand times the luminosity of the Sun.

9 Cassiopeiae has a number of faint companions listed in multiple star catalogues, but they all appear to be at different distances and none are thought to be gravitationally associated.

References

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}}

Category:A-type bright giants

Category:Cassiopeia (constellation)

Category:Lambda Boötis stars