| 词条 | Tau2 Serpentis |
| 释义 |
| name = τ2 Serpentis}}{{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Serpens | ra = {{RA|15|32|09.6751}}[1] | dec = {{DEC|+16|03|22.208}}[1] | appmag_v=6.218[1] }}{{Starbox character | class = B9V[1] | u-b = −0.23[2] | b-v = −0.05[2] }}{{Starbox astrometry | radial_v = −18 ± 5[1] | prop_mo_ra = −2.87[1] | prop_mo_dec = 6.76[1] | parallax = 7.56 | p_error = 0.80 | parallax_footnote = [1] | absmag_v= +0.44[3] }}{{Starbox detail | rotational_velocity = 175[2] | radius = 2.7[4] | luminosity = 74[3] }}{{Starbox catalog | names={{odlist | B=τ2 Ser | F=12 Serpentis | BD=+16° 2797 | HD=138527 | HIP=76069 | HR=5770 | SAO=101600 | GC=20880 | PPM=131484 }}[1] }}{{Starbox reference | Simbad=tau2+ser}}{{Starbox end}}Tau2 Serpentis, Latinized from τ2 Serpentis, is a B-type main sequence star in the constellation of Serpens, approximately 430 light-years from Earth. It has an apparent visual magnitude of approximately 6.218.[1] This is a Lambda Boötis star.[3] References1. ^1 2 3 4 5 6 7 8 9 {{SIMBAD link|tau2+ser|* 12 Ser -- Star}}, database entry, SIMBAD. Accessed on line September 19, 2008. {{Stars of Serpens}}{{DEFAULTSORT:Tau2 Serpentis}}{{main-star-stub}}2. ^1 2 HR 5770, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 19, 2008. 3. ^1 2 {{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=. }} 4. ^HD 138527, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line September 19, 2008. 8 : Serpens (constellation)|B-type main-sequence stars|Flamsteed objects|Bayer objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects|Durchmusterung objects |
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