Is Tonight's Comet Visible? Lemmon and SWAN Near Earth

Is Tonight's Comet Visible?

Tonight offers a rare opportunity to spot Comets Lemmon and SWAN as they make their closest approach to Earth. In New Jersey, visibility depends on clear skies and finding the right direction shortly after sunset. Comet Lemmon, brighter and exhibiting a faint green hue, is best seen in the northwestern sky just after dusk, near the Big Dipper and the star Cor Caroli. Meanwhile, Comet SWAN appears fainter with a bluish-green tint and can be found low on the southwestern horizon within the constellation Scutum.

Timing and Viewing Tips

For optimal viewing, aim to observe between sunset and 9 p.m., when both comets are above the horizon but not too low to be obscured by trees or buildings. Using binoculars or a small telescope enhances the experience, although under ideal dark skies, Lemmon may be glimpsed with the naked eye. Apps that track star maps can assist in locating these elusive visitors among the stars.

Where to Look

Look northwest for Comet Lemmon, following the curve of the Big Dipper’s handle toward the bright star Arcturus, then just below nearby stars Epsilon and Rho Boötis. For Comet SWAN, scan the southwestern sky near the constellation Serpens and the “teapot” asterism in Sagittarius. Patience and dark skies are key to enjoying this celestial show.