维基百科
2MASS J15404342−5101357
天球赤道座標： 15h 40m 43.537s，−51° 01′ 35.968″
2MASS J15404341−5101357 (縮寫為 2M1540)是一顆位於矩尺座光譜類型為M7的紅矮星，距離地球約17.3光年。它是距離最近的已知M7矮星。[2]
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 矩尺座 |
| 星官 | |
| 赤經 | 15h 40m 43.537s[1] |
| 赤緯 | -51° 01′ 35.968″[1] |
| 視星等（V） | 15.26[2] |
| 特性 | |
| 演化阶段 | 主序星[2] |
| 光谱分类 | M7V[2] |
| 视星等 (J) | 8.96[3] |
| 天体测定 | |
| 徑向速度 (Rv) | 50.0[3] km/s |
| 自行 (μ) | 赤经：+1.954[2] mas/yr 赤纬：−0.330[2] mas/yr |
| 视差 (π) | 187.7290 ± 0.0496[4] mas |
| 距离 | 17.374 ± 0.005 ly (5.327 ± 0.001 pc) |
| 詳細資料 [2] | |
| 質量 | 0.090±0.010 M☉ |
| 亮度 | 0.000603 L☉ |
| 溫度 | 2621±100 K |
| 其他命名 | |
2MASS J154043.42-510135.7, WISEA J154045.67-510139.3, UCAC4 195-119117, Gaia DR2 5985290231327158144 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
2M1540 2M1540在矩尺座的位置 | |
參考資料
- ^ 1.0 1.1 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051.
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Pérez Garrido, A.; Lodieu, N.; Béjar, V. J. S.; Ruiz, M. T.; Gauza, B.; Rebolo, R.; Zapatero Osorio, M. R. 2MASS J154043.42-510135.7: a new addition to the 5 pc population. Astronomy & Astrophysics. 2014, 567: A6. Bibcode:2014A&A...567A...6P. S2CID 118704532. arXiv:1405.5439 . doi:10.1051/0004-6361/201423615.
- ^ 3.0 3.1 Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley, The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs, The Astronomical Journal, 2018, 155 (6): 265, Bibcode:2018AJ....155..265H, S2CID 53983430, arXiv:1804.07377 , doi:10.3847/1538-3881/aac262
- ^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.