Gamma Apodis

{{Starbox begin

| name = γ Apodis

}}

{{Starbox image

| image=

{{Location mark

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

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=γ Apodis

|x=440|y=650

}}

|caption=Location of γ Apodis (circled)

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|16|33|27.08252}}

| dec = {{DEC|−78|53|49.7334}}

| appmag_v = 3.86

| constell = Apus

}}

{{Starbox character

| type = red clump

| class = G9 III

| b-v = +0.91

| u-b = +0.62

| variable =

}}

{{Starbox astrometry

| radial_v = +5.7

| prop_mo_ra = –125.575

| prop_mo_dec = –78.212

| pm_footnote =

| parallax = 21.3033

| p_error = 0.1523

| parallax_footnote =

| absmag_v = +0.41

}}

{{Starbox detail

| mass = 2.32

| radius = 10.293

| luminosity =

| temperature = 5,151{{±|50}}

| gravity = 3.074{{±|0.081}}

| metal_fe = 0.090{{±|0.042}}

| rotational_velocity = 5.016{{±|0.417}}

| age_gyr = 2.67

}}

{{Starbox catalog

| names = {{odlist | B=γ Aps, γ Apodis | FK5=611 | GJ=626.1 | GJ2=9563 | HD=147675 | HIP=81065 | HR=6102 | SAO=257407 | CPD=–78°1103 }}

}}

{{Starbox reference

|Simbad=gam+Aps

}}

Gamma Apodis is a star in the southern circumpolar constellation of Apus. Its identifier is a Bayer designation that is Latinized from γ Apodis, and is abbreviated Gam Aps or γ Aps, respectively. It is visible to the naked eye with an apparent visual magnitude of 3.86. From parallax measurements, the distance to this star can be estimated as {{Convert|153|ly|pc}}. The star is receding with a heliocentric radial velocity of +5.7 km/s.

A stellar classification of G9 III identifies Gamma Apodis as a giant star in the later stages of its evolution. This is a red clump giant, which means it is on the horizontal branch and is generating energy through core helium fusion. The star has 2.3 times the mass of the Sun and has expanded to 10.3 times the Sun's radius. It is 2.7 billion years old and is spinning with a projected rotational velocity of 5 km/s. This is an active X-ray source with a luminosity of {{val|1.607|e=30|u=erg s⁻¹}}, making it one of the 100 strongest stellar X-ray sources within 50 parsecs of the Sun.

Naming

In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, {{lang|zh|異雀}} ({{lang|zh-Latn|Yì Què}}), meaning Exotic Bird, refers to an asterism consisting of γ Apodis, ζ Apodis, ι Apodis, β Apodis, δ Octantis, δ¹ Apodis, η Apodis, α Apodis and ε Apodis. Consequently, γ Apodis itself is known as {{lang|zh|異雀四}} ({{lang|zh-Latn|Yì Què sì}}, {{langx|en|the Fourth Star of Exotic Bird}}).{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060729.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 29 日] {{Webarchive|url=https://web.archive.org/web/20110522124325/http://aeea.nmns.edu.tw/2006/0607/ap060729.html |date=2011-05-22 }}

References

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