78 Aquarii

{{short description|Star in the constellation Aquarius}}

{{Starbox begin}}

{{Starbox image

|image=250px

|caption=Snapshot of 78 Aqr from Digitized Sky Survey project

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{{starbox observe

|constell= Aquarius

|ra= {{RA|22|54|34.12178}}{{cite Gaia DR3|2610761708428000768}}

|dec= {{DEC|−07|12|16.6490}}

|epoch=J2000

|appmag_v= 6.181{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}

}}

{{Starbox character

|class=K2III{{cite journal|bibcode=1999MSS...C05....0H|title=Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5|journal=Michigan Spectral Survey|volume=5|author1=Houk, N.|author2=Swift, C.|year=1999}}

}}

{{Starbox astrometry

|radial_v = {{val|11.63|0.14}}

|prop_mo_ra=−14.811

|prop_mo_dec=−34.596

|parallax= 5.4411

|p_error=0.0498

|parallax_footnote=

}}

{{Starbox detail

|mass=

|luminosity=203

|temperature={{val|fmt=commas|4400|30}}{{cite journal |bibcode=2019AJ....158..138S |title=The revised TESS Input Catalog and Candidate Target List |author=Stassun, K.G.| display-authors=etal |date=October 2019 | journal=The Astronomical Journal |volume=158 |issue=4 |page=138 |arxiv=1905.10694 |doi=10.3847/1538-3881/ab3467 |s2cid=166227927 |doi-access=free }}

|radius= 21.775

|gravity=1.72{{cite journal |bibcode=2024A&A...685A..59M |title=Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog |last1=Matsuno |first1=Tadafumi |last2=Starkenburg |first2=Else |last3=Balbinot |first3=Eduardo |last4=Helmi |first4=Amina |journal=Astronomy and Astrophysics |date=2024 |volume=685 |pages=A59 |doi=10.1051/0004-6361/202245762 |arxiv=2212.11639 }}

|metal_fe=−0.01

}}

{{Starbox catalog

|names= {{odlist|HD=216637|HR=8710|HIP=113127|SAO=146382|BD=−07°5886}}{{cite simbad|title=78 Aqr|accessdate=2021-02-22}}

}}

{{Starbox reference

|Simbad=78+Aqr

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{{Starbox end}}

78 Aquarii (abbreviated 78 Aqr) is a star in the constellation of Aquarius. 78 Aquarii is its Flamsteed designation. Based on stellar parallax measurements made by Gaia, it is located about 600 light-years (180 parsecs) from the Sun.

78 Aquarii has a spectral type of K2III, indicating a giant star with a reddish color. Its apparent magnitude is 6.18, indicating it is not visible to the sky for all but the best viewing conditions. At its surface, its temperature is estimated to be roughly 4,400 K. It has no known exoplanets.