Neptune at opposition, September 26: how to find the most distant planet
Neptune reaches opposition in the small hours of September 26 (around 00–01 UT), which makes this the best week of the year to track down the solar system’s most distant planet. Opposition just means the planet sits opposite the Sun in our sky: it rises at sunset, climbs highest near local midnight, and stays up until dawn. It’s also as close and as bright as Neptune gets in 2026 — magnitude 7.8, about 28.9 AU away. That brightness still isn’t enough for your eyes alone. Magnitude 7.8 is roughly three times fainter than the dimmest star you can catch with the naked eye under a good sky, so this is a binocular-and-telescope target. What you’re hunting is a single blue-grey point among the faint stars of Pisces, and the whole game is telling it apart from them. ...
