RS Puppis

Photo Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-Hubble/Europe Collaboration. Acknowledgment: H. Bond (STScI and Pennsylvania State University)

照片版权：NASA、ESA 和 Hubble 遗产团队（STScI/AURA）- Hubble/Europe 合作组。致谢：H. Bond（STScI 和宾夕法尼亚州立大学）

RS Puppis is a Cepheid variable star. This image was made by the NASA Hubble Space Telescope on March 26, 2010 with an exposure time of 35 minutes. It is a southern hemisphere star with a cocoon of reflective dust illuminated by the star. It is projected to be ten times more massive than our Sun and 200 times larger. RS Puppis rhythmically brightens and dims over a six-week cycle. It is one of the most luminous in the class of so-called Cepheid variable stars. Its average intrinsic brightness is 15,000 times greater than our Sun's luminosity. Its distance is 6,500 light years (2000 parsecs) +/- 1%.

RS Puppis 是一颗造父变星。这张图像由 NASA 长征空间望远镜于 2010 年 3 月 26 日拍摄，曝光时间为 35 分钟。它是一颗南半球的恒星，周围有一团由反射尘埃构成的云团，被该恒星照亮。它预计是太阳的十倍质量，两百倍体积。RS Puppis 以六周为一个周期，周期性地变亮和变暗。它是所谓造父变星中最为明亮的之一。其平均固有亮度是太阳的 15,000 倍。其距离为 6,500 光年（2000 秒差距）±1%。