| absmag_v =
}}{{Starbox orbit
| reference = [12]
| period = 64.62
| axis = 0.408
| eccentricity= 0.140
| inclination = 77.6
| node = 276.3
| periastron = 1941.29
| periarg = 354.6
}}{{Starbox detail
| mass =
| radius =
| luminosity =
| temperature =
| metal_fe =
| rotational_velocity = 175[13]
| age_myr =
}}{{Starbox catalog
| names= BD–15° 6406, HD 220278, HIP 115404, HR 8890, SAO 165658.[14]
}}{{Starbox reference
|Simbad=97+Aqr
}}{{Starbox end}}97 Aquarii (abbreviated 97 Aqr) is a binary star system in the equatorial constellation of Aquarius. 97 Aquarii is the Flamsteed designation. The combined apparent visual magnitude of the system is 5.20;[3] the brighter star is magnitude 5.59 while the companion is magnitude 6.72.[4] Based upon an annual parallax shift of 15.30 milliarcseconds,[ this system is at a distance of around {{Convert|210|ly|pc|abbr=off|lk=on}} from Earth.]
The two stars in this system orbit each other over a period of 64.62 years at an eccentricity of 0.14.[4] Both are A-type main sequence stars; the primary has a stellar classification of A2 V while its companion is A7 V.[5] Their composite spectrum shows the properties of a Lambda Boötis star, which means it displays peculiar abundances of certain elements.[20]
References
1. ^1 {{cite book | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}
2. ^1 {{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 |date=February 2007 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | postscript=. }}
3. ^1 2 3 4 {{citation | last1=Nicolet | first1=B. | year=1978 | title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System | journal=Astronomy and Astrophysics Supplement Series | volume=34 | pages=1–49 | bibcode=1978A&AS...34....1N | postscript=. }}
4. ^1 2 {{citation | last1=Christy | first1=James W. | last2=Walker | first2=R. L., Jr. | title=MK Classification of 142 Visual Binaries | journal=Publications of the Astronomical Society of the Pacific | volume=81 | issue=482 | page=643 |date=October 1969 | doi=10.1086/128831 | bibcode=1969PASP...81..643C }}
5. ^1 {{cite simbad | title=* 97 Aqr | accessdate=2012-07-17 }}
6. ^1 2 3 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 }}
7. ^1 {{citation | last1=Gerbaldi | first1=M. | last2=Faraggiana | first2=R. | last3=Lai | first3=O. | title=The heterogeneous class of lambda Bootis stars | journal=Astronomy and Astrophysics | volume=412 | pages=447–464 |date=December 2003 | doi=10.1051/0004-6361:20031472 | bibcode=2003A&A...412..447G | postscript=. }}
8. ^1 {{citation | title=New orbits | journal=International Astronomical Union Commission 26 (Double Stars) | issue=Information Circular No. 139 | pages=1–2 | year=1999 | bibcode=1999IAUDS.139....1. }}