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L 98-59

天球赤道座標星圖 8h 18m 7.896s, −68° 18′ 52.247″
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L 98-59
觀測資料
曆元
星座 飛魚座
星官
赤經 8h 18m 7.896s
赤緯 -68° 18′ 52.247″
視星等(V) 11.7
特性
演化阶段主序星
光谱分类M3V C
变星类型9.6
天体测定
视差 (π)94.266 ± 0.27 mas
距离34.60 ± 0.10 ly
(10.61 ± 0.03 pc)
绝对星等 (MV)11.6
詳細資料 [1]
L 98-59
質量0.32 M
半徑0.29 R
溫度3469 K
其他命名
L 98-59、​LTT 19357、​2MASS J14010324-0239180
參考資料庫
SIMBAD资料

L 98-59,是一顆位於飛魚座附近的紅矮星,距離地球約34.6光年。[2]

行星系統

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這顆恆星擁有四個已知行星[3]

L 98-59的行星系[3]
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b 0.40+0.16
−0.15
 M
0.02191+0.00080
−0.00084
2.2531136+0.0000012
−0.0000015
0.103+0.117
−0.045
87.71+1.16
−0.44
°
0.85+0.061
−0.047
 R
c 2.22+0.26
−0.25
 M
0.0304+0.0011
−0.0012
3.6906777+0.0000016
−0.0000026
0.103+0.045
−0.058
88.11+0.36
−0.16
°
1.385+0.095
−0.075
 R
d 1.94±0.28 M 0.0486+0.0019
−0.0019
7.4507245+0.0000081
−0.0000046
0.074+0.057
−0.046
88.449+0.058
−0.111
°
1.521+0.119
−0.098
 R
e >3.06+0.33
−0.37
 M
0.0717+0.0060
−0.0048
12.796+0.020
−0.019
0.128+0.108
−0.076
f (未确认) >2.46+0.66
−0.82
M
0.1034+0.0042
−0.0044
23.15+0.60
−0.17
0.21+0.17
−0.11

參考

[编辑]
  1. ^ Cloutier, R.; Astudillo-Defru, N.; Bonfils, X.; Jenkins, J. S.; Berdiñas, Z.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J.; Jenkins, J. M. Characterization of the L 98-59 multi-planetary system with HARPS - Mass characterization of a hot super-Earth, a sub-Neptune, and a mass upper limit on the third planet. Astronomy & Astrophysics. 2019-09-01, 629: A111 [2023-04-17]. Bibcode:2019A&A...629A.111C. ISSN 0004-6361. S2CID 166228063. arXiv:1905.10669可免费查阅. doi:10.1051/0004-6361/201935957. hdl:1721.1/125703可免费查阅. (原始内容存档于2021-09-19) (英语). 
  2. ^ REINERS A.; ZECHMEISTER M. Radial velocity photon limits for the dwarf stars of spectral classes F-M.. 天文期刊. 2021, 247 (1): 14. Bibcode:2020ApJS..247...11R. S2CID 208910700. arXiv:1912.04120可免费查阅. doi:10.3847/1538-4365/ab609f. 
  3. ^ 3.0 3.1 Demangeon, Oliver D. S.; Zapatero Osorio, M. R.; Alibert, Y.; Barros, S. C. C.; Adibekyan, V.; Tabernero, H. M.; et al. A warm terrestrial planet with half the mass of Venus transiting a nearby star (PDF). Astronomy & Astrophysics. July 2021, 653: 38 [2023-04-17]. Bibcode:2021A&A...653A..41D. S2CID 236957385. arXiv:2108.03323可免费查阅. doi:10.1051/0004-6361/202140728. (原始内容存档 (PDF)于2021-11-13). 
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