鯨魚座τe

Multi tool use
Tau Ceti e
太陽系外行星
| 太陽系外行星列表
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母恆星
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母恆星 | 天倉五 |
星座 | 鯨魚座 |
赤經 | (α) | 01h 44m 05s |
赤緯 | (δ) | −15° 56′ 15″ |
距離 | 11.905 ± 0.007 ly (3.65 ± 0.002 pc) |
光譜類型 | G8.5V |
軌道參數
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半长轴 | (a) | 0.552 ± 0.02[1]AU
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軌道離心率 | (e) | 0.05 ± 0.02[1] |
公轉週期 | (P) | 168.12 ± 2.0[1]d (0.46 y) |
半振幅 | (K) | 0.58 [1]m/s
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物理性质
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最小质量 | (m sin i) | 4.3[1]M⊕ |
發現
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發現時間 | 2012年12月19日 |
發現者 | Tuomi 等人 |
發現方法 | 徑向速度 |
發表論文 | 未確認 |
數據庫參考 |
太陽系外行星 百科全書 | data |
SIMBAD | data |
鯨魚座τe(Tau Ceti e),即天倉五e,是一顆尚未確認的太陽系外行星,母恆星是類似太陽的鯨魚座恆星天倉五,距離地球約11.905光年,是距離母恆星第四遠的行星。
概要
鯨魚座τe 和天倉五的其他四顆行星,該顆行星是使用來自凱克望遠鏡的 HIRES、英澳行星搜尋計畫以及高精度徑向速度行星搜索器的資料進行恆星徑向速度變化的統計發現的[1]。
該行星因為是位於天倉五的適居帶範圍內部較接近母恆星的位置而受到注意,它和母恆星的距離是0.552天文單位,相當於太陽系中水星和金星軌道之間,軌道週期168日。該行星可能是超級地球,質量下限是4.3倍地球質量。假設它是由岩石和水組成的話,體積可能是地球的1.8倍。但因為它和母恆星的距離,因此該型星可能和金星一樣有能引起強烈溫室效應的濃密大氣層,表面溫度可能達到70°C或343 K,而這種溫度下也許只有嗜熱生物能生存[2]。
參考資料
^ 1.01.11.21.31.41.5 Tuomi, M.; et al. Signals embedded in the radial velocity noise: Periodic variations in the tau Ceti velocities (PDF). Astronomy & Astrophysics. arXiv:1212.4277.
^ Two Nearby Habitable Worlds?
← 位于10-15光年范围内的恒星系统 →
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| 与地球距离与地球距离在10–15光年范围内的恒星系统(包括褐矮星恒星系统) | |
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G V (黄)
| 天仓五(11.905 ± 0.007光年;1颗恒星、5颗行星:b · c · d · e · f)
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K V (橙)
| 天苑四(10.480 ± 0.003光年;1颗恒星、2颗行星:b · c)
天鹅座61(11.40 ± 0.02光年;2颗恒星)
印第安座ε(11.81 ± 0.01光年;1颗恒星、2颗褐矮星)
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M V (红矮星)
| 罗斯248(10.31 ± 0.02光年;1颗恒星)
拉卡伊9352(10.69 ± 0.02光年;1颗恒星)
罗斯128(10.94 ± 0.05光年;1颗恒星)
宝瓶座EZ(11.27 ± 0.17光年;3颗恒星)
斯特鲁维2398(11.49 ± 0.06光年;2颗恒星)
格龙布里奇34(11.65 ± 0.03光年;2颗恒星)
巨蟹座DX(11.83 ± 0.13光年;1颗恒星)
GJ 1061(11.99 ± 0.06光年;1颗恒星)
鲸鱼座YZ(12.12 ± 0.14光年;1颗恒星)
鲁坦星(12.25 ± 0.03光年;1颗恒星)
蒂加登星(12.57 ± 0.04光年;1颗恒星)
卡普坦星(12.76 ± 0.05光年;1颗恒星)
拉卡伊8760(12.87 ± 0.04光年;1颗恒星)
克鲁格60(13.15 ± 0.07光年;2颗恒星)
罗斯614(13.34 ± 0.05光年;2颗恒星)
沃夫1061(13.92 ± 0.09光年;1颗恒星、3颗行星:b · c · d)
格利泽1(14.16 ± 0.06光年;1颗恒星)
沃夫424(14.31 ± 0.29光年;2颗恒星:A · B)
白羊座TZ(14.51 ± 0.19光年;1颗恒星)
格利泽687(14.79 ± 0.06光年;1颗恒星)
LHS 292(14.81 ± 0.25光年;1颗恒星)‡
GJ 1245(14.81 ± 0.07光年;3颗恒星)
格利泽674(14.82 ± 0.09光年;1颗恒星、1颗行星:b)
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白矮星 |
DZ | 范马南星(14.02 ± 0.11光年;1颗恒星)
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褐矮星 |
M | SCR 1845-6357(12.57 ± 0.05光年;2颗褐矮星)
DEN 1048-3956(13.12 ± 0.06光年;1颗褐矮星)
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| T | UGPS 0722-05(13.3 ± 2.0光年;1颗褐矮星)‡
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| Y | WISE 0350-5658(13.7+2.6 −1.9光年;1颗褐矮星)‡
WISE 1541-2250(~13.7光年;1颗褐矮星)‡
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| | 左栏标出的是恒星系统中主要恒星的恒星类型。‡若考虑距离误差容限,恒星系统有可能在此范围外。 粗体字突出的恒星系统为拥有至少一颗绝对星等在+8.5或以上的恒星的系统。斜体字突出的是有可能在此范围之外的恒星系统。 |
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