16 Aquarii

{{Starbox begin

| name = 16 Aquarii

}}

{{Starbox observe

| epoch = J2000

| constell = Aquarius

| ra = {{RA|21|21|04.31919}}

| dec = {{DEC|−04|33|36.4532}}

| appmag_v = 5.869

}}

{{Starbox character

| class = G7 III

| b-v = {{Val|0.912|0.001}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−6.0|2.9}}

| prop_mo_ra = −9.86

| prop_mo_dec = +11.22

| parallax = 9.5319

| p_error = 0.1192

| parallax_footnote =

| absmag_v = 1.08

}}

{{Starbox detail

| source =

| mass = {{Val|2.34|0.13}}

| radius = {{Val|7.86|0.26}}

| luminosity = {{Val|37.4|2.3}}

| temperature = {{Val|5096|35|fmt=commas}}

| metal_fe = {{Val|0.01|0.10}}

| gravity = {{Val|3.03|0.04}}

| rotational_velocity = 1.79

| age_myr = {{Val|740|130}}

}}

{{Starbox catalog

| names = {{odlist | F=15 Aqr | BD=−05°5524 | HD=203222 | HIP=105412 | HR=8160 | SAO=145317 }}

}}

{{Starbox reference

| Simbad = 16+Aqr

}}

16 Aquarii, abbreviated 16 Aqr, is a star in the constellation of Aquarius. 16 Aquarii is the Flamsteed designation. It is a faint star, just visible to the naked eye, with an apparent visual magnitude of 5.869. Based upon an annual parallax shift of {{Val|9.5|ul=mas}}, it is located about 342 light years away. It is moving closer to the Earth with a heliocentric radial velocity of −6 km/s, and is predicted to come within {{Convert|66.91|pc|ly|abbr=off|sigfig=2|disp=out}} in 6.8 million years.

At the estimated age of 740 million years, this is an aging giant star currently on the red giant branch with a stellar classification of G7 III. This indicates it has exhausted the supply of hydrogen at its core and is generating energy via hydrogen fusion along a shell surrounding a hot core of inert helium. The star has 2.3 times the mass of the Sun and has expanded to 8 times the Sun's radius. It is radiating 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,096 K.

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Category:G-type giants

Category:Aquarius (constellation)

Category:Durchmusterung objects