S5-HVS1 is an A-type main-sequence star notable as the fastest one detected as of November 2019, and has been determined to be traveling at 1,755 km/s (3,930,000 mph). [1][3][4][5][6][7][8][9][10] The star is in the Grus (or Crane) constellation in the southern sky, and about 29,000 light-years from Earth.

The star S5-HVS1 is a ∼2.35 M ⊙ A-type star located at a distance of ∼9 kpc from the Sun and has a heliocentric radial velocity of 1017 ± 2.7 km s^{-1} without any signature of velocity variability. The current 3D velocity of the star in the Galactic frame is 1755 ± 50 km s^{-1}.

2019年11月15日 · S5-HVS1 is unprecedented due to its high speed and close passage to the Earth, "only" 29,000 light years away. With this information, astronomers could track its journey back into the center of the Milky Way, where a four million solar mass black hole, known as Sagittarius A*, lurks.

2019年11月13日 · Hurtling at the blistering speed of 2.3 million mph (1,017 km/s), the newfound hypervelocity star is moving so fast that it will leave the Milky Way and head into intergalactic space. Dubbed S5-HVS1, this star is currently located in the constellation of Grus at a distance of about 29,000 light-years.

2020年5月25日 · Taking a Monte Carlo approach, we show that the former companion of S5-HVS1 was likely a main-sequence star between 1.2 and 6 solar masses and was captured into a highly eccentric orbit with pericenter distance in the range 1-10 AU and semimajor axis about $10^3$ AU. We then explore the fate of the captured star.

s5-hvs1非常值得研究。它是一颗主序星，即星核仍在进行 氢核聚变 的‘活着’的恒星；事实上，它还很年轻，约5亿年，而他的生命周期被估计为10亿年。 这是一颗质量约为太阳的2.35倍，正在明亮地发光的a类恒星。

2019年7月26日 · We present the serendipitous discovery of the fastest Main Sequence hyper-velocity star (HVS) by the Southern Stellar Stream Spectroscopic Survey (S5). The star S5-HVS1 is a ∼ 2.35 M ⊙ A-type star located at a distance of ∼ 9 kpc from the Sun and has a heliocentric radial velocity of 1017 ± 2.7 km/s without any signature of velocity variability.

2019年11月14日 · 近日科学家们就发现一个奇特的恒星，正在以极快的速度逃离银河系，这颗编号为s5-hvs1的恒星正以惊人的600万公里/小时的速度行进，每秒钟的速度就高达1700公里，是已知速度最快的恒星，它的速度也已经超过了银河系的逃逸速度，也就是说银河系引力已经对它 ...

2019年12月3日 · 卡内基美隆大学麦克威廉姆斯天文研究中心（Carnegie Mellon University's McWilliams Center for Cosmology）的一组研究团队，发现了一颗距地球29,000 光年的星体—— S5-HVS1，正以比一般星体快10 倍的速度移动。

2019年12月2日 · 卡內基美隆大學麥克威廉姆斯天文研究中心（Carnegie Mellon University’s McWilliams Center for Cosmology）的一組研究團隊，發現了一顆距地球 29,000 光年的星體—— S5-HVS1，正以比一般星體快 10