2MASS J15404341−5101357 (缩写为 2M1540)是一颗位于矩尺座光谱类型为M7的红矮星，距离地球约17.3光年。它是距离最近的已知M7矮星。[2]
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 矩尺座 |
| 星官 | |
| 赤经 | 15h 40m 43.537s[1] |
| 赤纬 | -51° 01′ 35.968″[1] |
| 视星等（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 | |
| 径向速度 (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) |
| 详细资料 [2] | |
| 质量 | 0.090±0.010 M☉ |
| 亮度 | 0.000603 L☉ |
| 温度 | 2621±100 K |
| 其他命名 | |
2MASS J154043.42-510135.7, WISEA J154045.67-510139.3, UCAC4 195-119117, Gaia DR2 5985290231327158144
| |
| 参考资料库 | |
| SIMBAD | 资料 |
  2M1540 2M1540在矩尺座的位置 | |
参考资料
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