STEREO - Solar Terrestrial Relations Observatory
[Home] [Contact] [Site Map]

Important notice about the deactivation of the STEREO ftp server

Important notice about the STEREO redirects

Important notice about STEREO Behind

Farewell Comet ISON


The STEREO Ahead spacecraft was in a great position to observe Comet ISON as it raced to its closest passage by the Sun (Nov. 28 - 29, 2013). It featured a brilliantly elongated tail as it passed the coronagraph’s occulting disk (within 1 million km). Then, it apparently broke up into smaller pieces that continued on its orbit path, much reduced in brightness and with little tail. Hopes that it would become a very bright comet were dashed. the comet is still visible in Ahead HI1, and we will continue to observe it as long as we can. (Lower left bright object is Mercury.) Credit: STEREO/NASA.

Last Revised: May 17, 2024 19:10:34 UTC
Responsible NASA Official:
Privacy Policy and Important Notices
Webmaster: Apexa Patel