Comet Lemmon remains to be a worthy goal

This celestial customer continues to outperform expectations.

This magnificent picture of Comet C/2025 A6 (Lemmon) was taken October 24 from Payson, Arizona. The photographer collected 40 minutes of publicity by means of his Celestron RASA telescope at f/2, utilizing a ZWO ASI 2600 MC digicam. Visually, you received’t see the colours he captured or the complete size of the tail, however you will note the intense coma and a few of the tail emanating from it.
Credit: Chris Schur

“Comets are like cats. They both have tails and do what they want,” stated comet discoverer David Levy many instances. Well, Comet C/2025 A6 (Lemmon) is proving his phrases true. Most comet-watchers thought that Lemmon would attain its brightest October 21 when it was closest to Earth. But it continued to brighten for a number of days previous that date. And it nonetheless appears to be like good. In reality, present estimates of its brightness put it at 4th magnitude, which might usually make it simple to identify for sharp-eyed observers. Unfortunately, with the Moon getting brighter every evening, even from a darkish web site, you in all probability received’t have the ability to see it with your bare eyes until the comet has an outburst. That’s the place binoculars are available.

Comet Lemmon is nonetheless on its inbound journey proper now earlier than it swings across the Sun and heads again out. So, it’s getting brighter because it receives extra photo voltaic vitality, nevertheless it’s additionally fading as a result of it’s shifting away from Earth. We hope that the rise in vitality greater than makes up for the growing distance, however we simply don’t know. That’s why we now have to maintain watching it.

Observe it

First, discover the time the Sun units at your location. A fast Google seek for, “When is sunset at [location]” will do it. Then, head out an hour and a half later than your sundown time and face northwest. Use the finder chart right here to determine a few of the seen stars, after which level binoculars towards the comet’s location and attempt to see it.

Lemmon is at the moment passing in entrance of the celebrities of the faint constellation Serpens. That’s an issue for individuals who don’t know the sky as a result of there aren’t any vibrant stars close to the comet. Most observers will goal Arcturus (the brightest star within the constellation Boötes) and transfer to the higher left from that star.

If you’re utilizing a telescope to look at it, set your instrument outdoors about an hour earlier than you propose to make use of it to let it alter to the ambient temperature. Start viewing Comet Lemmon together with your lowest energy eyepiece. Depending on the size of the tail, you may have the ability to see the entire comet. Then, step-by-step, enhance the magnification and scan the comet’s size for particulars. Can you see a single tail, or are there two? Are any elements of the tail brighter than others? Does the tail look disconnected at any level? Take your time.

More particulars

Comet Lemmon was found January 3, 2025, as a part of the Mount Lemmon Survey, which makes use of a 60-inch telescope at Mt. Lemmon, Arizona (a scant 15.5 miles north of the creator’s house). The digicam connected to the telescope’s prime focus captures pictures which might be 5° sq..

Interestingly, the comet’s present orbital interval is roughly 1,350 years. But after its perihelion passage (its closest strategy to the Sun) on November 8, our star’s gravity will cut back that to 1,150 years. So, the following likelihood for earthbound observers to see this occasional customer might be across the yr 3175.

So, take a couple of minutes within the night and attempt to spot Comet Lemmon — a ball of frozen gases at the moment rushing previous Earth at 135,000 miles per hour (217,000 kilometers per hour). Don’t wait too lengthy as a result of the Moon is getting bigger and brighter every evening, spreading an increasing number of of its mirrored daylight by means of our ambiance. Now is the time to identify it. Good luck!