| 释义 |
- References
{{Starbox begin
| name = 17 Aquarii
}}{{Starbox observe
| epoch = J2000
| constell = Aquarius
| ra = {{RA|21|22|56.25866}}[1]
| dec = {{DEC|−09|19|09.5823}}[1]
| appmag_v = 5.99[3]
}}{{Starbox character
| class = K4/5 III[4]
| b-v = {{Val|1.516|0.008}}[3]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = {{Val|18.2|2.9}}[6]
| prop_mo_ra = −29.659[1]
| prop_mo_dec = −29.022[1]
| parallax = 4.9125
| p_error = 0.1260
| parallax_footnote = [1]
| absmag_v = −0.73[3]
}}{{Starbox orbit
| reference = [11]
| period_unitless = 7,290 d
| eccentricity = 0.4
}}{{Starbox detail
| source =
| component1 = 17 Aqr A
| mass =
| radius =
| luminosity = 495.46[3]
| temperature = {{Val|3951|14|fmt=commas}}[13]
| metal_fe = {{Val|−0.10|0.06}}[13]
| gravity = {{Val|1.74|0.14}}[13]
| rotational_velocity =
| age_myr =
}}{{Starbox catalog
| names = {{odlist | f=17 Aqr | BD=−09° 5728 | FK5=3705 | HD=203525 | HIP=105574 | HR=8175 | SAO=145351 }}
}}{{Starbox reference
| Simbad = 17+Aqr
}}{{Starbox end}}17 Aquarii, abbreviated 17 Aqr, is a spectroscopic binary[11] star system in the constellation of Aquarius. 17 Aquarii is the Flamsteed designation. It appears to the naked eye as a faint sixth magnitude star, having a combined apparent visual magnitude of 5.99.[3] The distance to 17 Aqr can be estimated from its annual parallax shift of {{Val|4.9|ul=mas}},[1] which yields a separation of around 660 light years. It is moving further away with a heliocentric radial velocity of 18 km/s.[6]A preliminary orbit for the pair gives a period of {{Convert|7290|days|years|sigfig=2|abbr=off|disp=out}} and an eccentricity of 0.4.[11] The primary component is an aging giant star with a stellar classification of K4/5 III.[4] It is radiating 495[3] times the Sun's luminosity from its photosphere at an effective temperature of 3,951 K.[13] References1. ^1 2 3 4 5 6 {{cite DR2}}
2. ^1 2 3 4 5 6 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
3. ^1 2 3 {{cite journal | displayauthors=1 | last1=Famaey | first1=B. | last2=Pourbaix | first2=D. | last3=Frankowski | first3=A. | last4=Van Eck | first4=S. | last5=Mayor | first5=M. | last6=Udry | first6=S. | last7=Jorissen | first7=H. A. | title=Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations | journal=Astronomy and Astrophysics | volume=498 | issue=2 | pages=627–640 | year=2009 | arxiv=0901.0934 | bibcode=2009A&A...498..627F | doi=10.1051/0004-6361/200810698 | postscript=. }}
4. ^1 2 3 4 {{cite journal | last1=Wu | first1=Yue | last2=Singh | first2=H. P. | last3=Prugniel | first3=P. | last4=Gupta | first4=R. | last5=Koleva | first5=M.| display-authors=1 | title=Coudé-feed stellar spectral library – atmospheric parameters | journal=Astronomy & Astrophysics | volume=525 | pages=A71 | year=2010 | bibcode=2011A&A...525A..71W | arxiv=1009.1491 | doi=10.1051/0004-6361/201015014 }}
5. ^1 2 {{cite journal | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32 | issue=11 | pages=759–771 | year=2006 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | doi=10.1134/S1063773706110065 }}
6. ^1 2 {{citation | last1=Houk | first1=N. | last2=Swift | first2=C. | title=Michigan catalogue of two-dimensional spectral types for the HD Stars | journal=Michigan Spectral Survey | volume=5 | year=1999 | postscript=. | bibcode=1999MSS...C05....0H }}
}}{{Stars of Aquarius}} 8 : K-type giants|Spectroscopic binaries|Aquarius (constellation)|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |