天壘城十三(寶瓶座19 )是在寶瓶座的一顆恆星。5.7等的視星等 [2]在波特爾暗空分類法中是裸眼很難看見的恆星。根據依巴谷衛星(太空船)所做的視差觀測,它與地球的距離大約是300光年(92秒差距)[1]。
天壘城十三的光譜類型為A8V[3],意味著它是一顆A型主序星。這類恆星的顏色是藍白色,表面的有效溫度在7,100至11,500K之間[8]。它的投影轉速大約是每秒155公里,顯示它旋轉得相當快[6],而這個數值是它的最低轉速。
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F.; et al. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664 [2019-01-02]. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. (原始内容存档于2016-04-02).
- ^ 2.0 2.1 Høg, E.; et al. The Tycho-2 catalogue of the 2.5 million brightest stars. Astronomy and Astrophysics. 2000, 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ 3.0 3.1 Houk, N.; Swift, C. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5. Michigan Spectral Survey. 1999, 5: 0. Bibcode:1999MSS...C05....0H.
- ^ Johnson, H. L. UBVRIJKL Photometry of the Bright Stars. Communications of the Lunar and Planetary Laboratory. 1966, 4: 99. Bibcode:1966CoLPL...4...99J.
- ^ Gontcharov, G. A. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system. Astronomy Letters. 2006, 32 (11): 759–771. Bibcode:2006AstL...32..759G. arXiv:1606.08053 . doi:10.1134/S1063773706110065.
- ^ 6.0 6.1 Royer, F.; Zorec, J.; Gómez, A. E. Rotational velocities of A-type stars. Astronomy and Astrophysics. 2007, 463 (2): 671. Bibcode:2007A&A...463..671R. arXiv:astro-ph/0610785 . doi:10.1051/0004-6361:20065224.
- ^ * 19 Aqr. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ Adelman, Saul J. The physical properties of normal A stars. Proceedings of the International Astronomical Union. 2004, 2004: 1. Bibcode:2004IAUS..224....1A. doi:10.1017/S1743921304004314.