38 Aquarii

{{about-distinguish|e Aquarii|epsilon Aquarii{{!}}ε (epsilon) Aquarii}}

{{Starbox image

| image =

File:Aquarius IAU.svg

12px

| caption = Location of 38 Aquarii (circled)

}}

{{Starbox observe

| epoch = J2000.0 (ICRS)

| ra = {{RA|22|10|37.48206}}

| dec = {{DEC|−11|33|53.7754}}

| appmag_v = +5.43

| constell = Aquarius

}}

{{Starbox character

| class = B5 III

| b-v = −0.12

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = +1.5

| prop_mo_ra = +29.29

| prop_mo_dec = +8.76

| parallax = 7.25

| p_error = 0.33

| parallax_footnote =

| absmag_v = −0.26

}}

{{Starbox detail

| component1 =

| mass =

| radius = 5.6

| luminosity = 219.16

| temperature = 13,860

| metal_fe = –0.26

| gravity = 4.00

| rotational_velocity = 20

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | F=38 Aqr | BD=−12°6196 | FK5=3771 | HD=210424 | HIP=109472 | HR=8452 | SAO=164910 }}

}}

{{Starbox reference

|Simbad=38+Aqr

}}

38 Aquarii is a star in the equatorial constellation of Aquarius. 38 Aquarii is its Flamsteed designation; its Bayer designation is e Aquarii. It is a faint star but visible to the naked eye, with an apparent visual magnitude of +5.43. Based on parallax measurements, it is around {{Convert|450|ly|pc|-1|abbr=off|lk=on}} away; it is 0.28 degree south of the ecliptic.

The spectrum of 38 Aquarii matches a stellar classification of B5 III. A luminosity class of III indicates that this is an evolved giant star. It has 5.6 times the radius of the Sun and is spinning with a projected rotational velocity of 20 km/s. The outer atmosphere of the star has a blue-white glow from an effective temperature of 13,860 K.

References

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{{citation

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters | postscript=.

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 }}

}}

Category:Aquarius (constellation)

Category:B-type giants