厕增六

厕增六,即天兔座ηEta Leporis、Eta Lep、η Leporis、η Lep)是一個位於天兔座的黃-白矮星[1]。它的視星等3.719[1]史匹哲太空望遠鏡的紅外攝譜儀觀測到該恆星旁有紅外過量的情形,相關模型則顯示有星周盤存在於該恆星周圍1到16光年處 [6]

厕增六
天兔座η
η Leporis
觀測資料
曆元 J2000.0
星座 天兔座
星官 参宿
赤經 05h 56m 24.2929s[1]
赤緯 −14° 10 03.721[1]
視星等(V) 3.719[1]
特性
光谱分类F2V[1]
U−B 色指数+0.01[2]
B−V 色指数+0.33[2]
R−I 色指数+0.16[2]
天体测定
徑向速度 (Rv)−2.4 ± 0.9[1] km/s
自行 (μ) 赤经:−42.23[1] mas/yr
赤纬:139.02[1] mas/yr
视差 (π)66.47 ± 0.74[1] mas
距离49.1 ± 0.5 ly
(15.0 ± 0.2 pc)
绝对星等 (MV)2.83[3]
詳細資料
質量1.42 (1.38 to 1.47)[4] M
半徑1.5[5] R
溫度6900[4] K
金屬量[Fe/H] = −0.25[4]
自轉速度 (v sin i)17[4] km/s
年齡1.8 (1.5 to 1.9) × 109[4]
其他命名
η Lep, Eta Leporis, Eta Lep, 16 Leporis, 16 Lep, BD−14 1286, FK5 226, GC 7492, GJ 225, HD 40136, HIP 28103, HR 2085, PPM 216474, SAO 150957.[1]
參考資料庫
SIMBAD资料

參考資料

  1. * eta Lep -- Star, database entry, SIMBAD. Accessed on line February 3, 2011.
  2. HR 2085, 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 February 3, 2011.
  3. From apparent magnitude and parallax.
  4. HD 40136, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 3, 2011.
  5. HD 40136, 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 February 3, 2011.
  6. Table 7, Explorations Beyond the Snow Line: Spitzer/IRS Spectra of Debris Disks Around Solar-type Stars, S. M. Lawler et al., The Astrophysical Journal 705, #1 (November 2009), pp. 89-111, doi:10.1088/0004-637X/705/1/89, Bibcode2009ApJ...705...89L.
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