3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and is the visually brightest quasar in the sky as seen from Earth, with an apparent visual magnitude of 12.9. [2] . The derived distance to this object is 749 megaparsecs (2.4 billion light-years).

3C 273 是位於 室女座 的一個 類星體。 它是有史以來第一個被辨識出的類星體。 它是在夜空中最亮的 可見光 類星體，從 地球 所見的 視星等 約為12.9等，也是最接近我們的類星體， 紅移 z =0.158 [5]。 由紅移推算的 光度距離 D L = 749 百萬秒差距 （2.4 吉光年） [4]。 它也是已知最亮的類星體， 絕對星等 為 -26.7 [6]；這意味著，如果它位於 北河三 （雙子座β，距離34光年）的距離上，它 看起來 會像太陽一樣耀眼。 太陽的絕對星等僅4.83，也就是說它在可見光波長的 光 …

3C 273是位于 室女座 的一个 类星体。 它在可见光波段上是最明亮的一个类星体，在天空中的 视星等 大约是12.9等，是最靠近地球的类星体之一， 红移 z只有0.158。 它的 光度距离，DL = 24.4亿光年（749 Mpc）是经由z值换算的。 它也是最明亮的类星体之一， 绝对星等 为-26.3等。 通过对它宽发射线的 反响映射 reverberation mapping测量，它的质量是太阳质量的8.86 ± 1.87亿倍。 3C 273是天空中最明亮的 类星体，也是第二个被发现的类星体。 早在1963年人们就发 …

Our Variable "Star" of the season -- the quasar 3C 273 in Virgo -- offers something for our entire observing community, visual and CCD, northern and southern. The brightest quasar in Earth's skies gives you the opportunity to look far across the universe and back in time, and view one of the most energetic classes of object in our universe.

Known as 3C 273, this was the first quasar to be identified and the optically-brightest at magnitude +12.9. It is the extremely luminous core of an active galaxy powered by a supermassive black hole and lies a staggering 2,443 million light-years distant, receding from us at 14.6 percent of the speed of light.

2021年2月19日 · Seen through a decent backyard telescope, 3c273 is a puny sight. It looks like a faint star in the constellation Virgo. Yet that insignificant point of light is the most-distant object visible through most amateur telescopes: about 2.4 billion light-years. The fact that it's visible at all tells us that 3c273 is far from puny.

2023年11月21日 · 3C 273 is the first identified and optically brightest quasar, the super bright nucleus of an “active” galaxy. It is visible with an 8-inch telescope from a dark-sky site, about 5 degrees northwest from Gamma Virginis.

2024年12月5日 · It looked like a star in the world's most powerful telescope of the time. But its light was weird. The expansion of the universe stretched the light into red wavelengths. This yardstick, called cosmological redshift, corresponds to a distance of 2.5 billion light-years for 3C 273. That's too far away for a lone star to be seen.

2024年12月7日 · 通过对比相隔 22 年的存档图像和新的日冕仪数据，研究团队发现 3C 273 的 30 万光年长的星系际喷流以接近光速的速度运动，并且在远离黑洞时速度更快。 哈勃望远镜的观测结果表明，类星体周围的环境非常复杂，可能存在星系碰撞和合并，碎片落入超大质量黑洞，重新点燃了驱动类星体的“引擎”。

Quasar 3C 273 is the first quasar redshift spectrum to be identified by Dr. Maarten Schmidt in 1963 with the Hale 200 inch (5.08 m) reflector at the Palomar Observatory. 3C_273 light travel-time is 1.98 Gyr based on H o = 73.00 km/sec/Mpc, Omega matter = …