<div class="" data-article-body="true"><p class="mb-4 text-lg md:leading-8 break-words"><i>When you buy through links on our articles, Future and its syndication partners may earn a commission.</i></p><figure class="relative mb-4"><div class="relative"><img alt=" A green ball of light showing comet Lemmon streaks across an orange and black night sky full of stars. . " loading="lazy" width="960" height="540" decoding="async" data-nimg="1" class="rounded-lg" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/DNH4cIxVasgtnUK1Lhn7YA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0MDtjZj13ZWJw/https://media.zenfs.com/en/space_311/7474e2429784b329358503ab34c1d196"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-4 size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-sm mt-1 pr-2.5"><div style="max-height:none;overflow:visible">Comet C/2025 A6 (Lemmon) as seen over Málaga, Spain, on Oct. 1, 2025. | Credit: Javier Zayas Photography/Getty Images</div></figcaption></figure><p class="mb-4 text-lg md:leading-8 break-words">After the excitement of three visible comets in 2025, another may put on a show in late April 2026. However, although the <a href="https://www.space.com/comets.html" rel="nofollow noopener" target="_blank" data-ylk="slk:comet;elm:context_link;itc:0;sec:content-canvas" class="link "><u>comet</u></a>, known as C/2025 R3 (PanSTARRS), could become bright enough to be seen with the naked eye, it could just as easily remain visible only through <a href="https://www.space.com/26021-best-binoculars.html" rel="nofollow noopener" target="_blank" data-ylk="slk:binoculars;elm:context_link;itc:0;sec:content-canvas" class="link "><u>binoculars</u></a> and <a href="https://www.space.com/15693-telescopes-beginners-telescope-reviews-buying-guide.html" rel="nofollow noopener" target="_blank" data-ylk="slk:telescopes;elm:context_link;itc:0;sec:content-canvas" class="link "><u>telescopes</u></a>.</p><p class="mb-4 text-lg md:leading-8 break-words">In the wake of <a href="https://www.yahoo.com/news/articles/astrophotographers-capture-views-comet-c-210000558.html" data-ylk="slk:Comets C/2025 A6 (Lemmon);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>Comets C/2025 A6 (Lemmon)</u></a> and <a href="https://www.yahoo.com/news/articles/comet-lemmon-night-sky-brightens-180000331.html" data-ylk="slk:C/2025 R2 (SWAN);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>C/2025 R2 (SWAN)</u></a> in October, Comet R3 (PanSTARRS) is due to reach perihelion — its closest point to <a href="https://www.space.com/58-the-sun-formation-facts-and-characteristics.html" rel="nofollow noopener" target="_blank" data-ylk="slk:the sun;elm:context_link;itc:0;sec:content-canvas" class="link "><u>the sun</u></a> — on April 20, 2026. On that date, this icy visitor to the inner <a href="https://www.space.com/16080-solar-system-planets.html" rel="nofollow noopener" target="_blank" data-ylk="slk:solar system;elm:context_link;itc:0;sec:content-canvas" class="link "><u>solar system</u></a> will come within 47.4 million miles (76.3 million kilometers) of the sun.</p><p class="mb-4 text-lg md:leading-8 break-words">That's between the orbits of <a href="https://www.space.com/36-mercury-the-suns-closest-planetary-neighbor.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Mercury;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Mercury</u></a> and <a href="https://www.space.com/44-venus-second-planet-from-the-sun-brightest-planet-in-solar-system.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Venus;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Venus</u></a>, or between 29 million and 67 million miles (47 million to 108 million kilometers), on average. On April 27, Comet C/2025 R3 (PanSTARRS) will be at its closest point to Earth — within 44 million miles (70.8 million km) — and so will probably be at its brightest.</p><h2 class="mb-4 text-xl font-bold md:text-2xl"><span>Comet C/2025 R3 (PanSTARRS) distance and brightness</span></h2><figure class="relative mb-4"><div class="relative"><img alt="A map of our solar system using different colored rings for the planets' orbits and in white a label showing the path of comet Panstarrs" loading="lazy" width="960" height="540" decoding="async" data-nimg="1" class="rounded-lg" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/w69GcnF1lzbP228lJj6KIQ--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0MDtjZj13ZWJw/https://media.zenfs.com/en/space_311/4fd9b29bee279a9af21670a7ce9b9cbf"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-4 size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-sm mt-1 pr-2.5"><div style="max-height:none;overflow:visible">The orbital path of Comet C/2025 R3 (PanSTARRS) through the inner solar system. | Credit: JPL Small-Body Database Lookup</div></figcaption></figure><p class="mb-4 text-lg md:leading-8 break-words">The brightness of comets is notoriously unpredictable. Although Comet C/2025 R3 (PanSTARRS) could prove to be the brightest comet of 2026, it's not known how bright it will get. Some <a href="http://www.aerith.net/comet/catalog/2025R3/2025R3.html" rel="nofollow noopener" target="_blank" data-ylk="slk:predict;elm:context_link;itc:0;sec:content-canvas" class="link "><u>predict</u></a> it could reach magnitude 8, which is about the same brightness as <a href="https://www.space.com/41-neptune-the-other-blue-planet-in-our-solar-system.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Neptune;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Neptune</u></a> — too faint to be seen with the naked eye but easy to spot in binoculars or a small telescope. Others <a href="https://astro.vanbuitenen.nl/comet/2025R3" rel="nofollow noopener" target="_blank" data-ylk="slk:predict;elm:context_link;itc:0;sec:content-canvas" class="link "><u>predict</u></a> Comet C/2025 R3 could reach a brightness of magnitude 2.5. That's comparable to the brightest stars in the famous W-shaped constellation Cassiopeia, which is easily visible with unaided eyes in a dark sky.</p><p class="mb-4 text-lg md:leading-8 break-words">Comet R3's prospects of becoming a bright, easy-to-see nighttime object may be enhanced by a phenomenon called forward scattering. Because this comet will move between <a href="https://www.space.com/54-earth-history-composition-and-atmosphere.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Earth;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Earth</u></a> and the sun, its tail will reflect and scatter a lot of sunlight in the direction of Earth — and into the eyes of observers — in late April 2026.</p><h2 class="mb-4 text-xl font-bold md:text-2xl"><span>When and where to see Comet C/2025 R3 (PanSTARRS)</span></h2><figure class="relative mb-4"><div class="relative"><img alt="A star map showing the great square of Pegasus and various stars and objects labeled, including the moon. Inside the square is a labeled dot for Comet Panstarrs" loading="lazy" width="960" height="540" decoding="async" data-nimg="1" class="rounded-lg" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/9oadriJ1pPtvDk2SG8Rfhg--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0MDtjZj13ZWJw/https://media.zenfs.com/en/space_311/bc6b9bf7c9bf8470b8ec25df365f0268"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-4 size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-sm mt-1 pr-2.5"><div style="max-height:none;overflow:visible">Comet C/2025 R3 (PanSTARRS) an hour before sunrise on April 13, 2025, as seen from midlatitudes of the Northern Hemisphere. | Credit: Starry Night</div></figcaption></figure><p class="mb-4 text-lg md:leading-8 break-words">Comet C/2025 R3 (PanSTARRS) will be at its best in the predawn sky in late April, as seen from the Northern Hemisphere, and after sunset in early May for viewers in the Southern Hemisphere. It will reach perihelion in the <a href="https://www.space.com/21456-pisces-constellation.html" rel="nofollow noopener" target="_blank" data-ylk="slk:constellation Pisces;elm:context_link;itc:0;sec:content-canvas" class="link "><u>constellation Pisces</u></a>, just beneath the Great Square of <a href="https://www.space.com/16743-constellation-pegasus.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Pegasus;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Pegasus</u></a>.</p><p class="mb-4 text-lg md:leading-8 break-words">When Comet R3 (PanSTARRS) brightens in the night sky, there will likely be some interference from moonlight, but darkness will prevail close to perihelion. A <a href="https://www.yahoo.com/news/moon-calendar-2025-next-moon-160307130.html" data-ylk="slk:new moon;elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>new moon</u></a> on April 17, 2026, bodes well for the comet's post-sunset perihelion on April 20. But at its closest point to Earth on April 27, it will likely be lost in the sun's glare.</p><p class="mb-4 text-lg md:leading-8 break-words">Around April 13-15, the comet will be within the Great Square of Pegasus, around 15 degrees above the eastern horizon, an hour before sunrise, as viewed from mid-northern latitudes. There will be a close to a waning crescent moon for a few mornings.</p><h2 class="mb-4 text-xl font-bold md:text-2xl"><span>Discovery of Comet C/2025 R3 (PanSTARRS)</span></h2><p class="mb-4 text-lg md:leading-8 break-words">Comet C/2025 R3 (PanSTARRS) was discovered on Sept. 8, 2025, by Pan-STARRS, a pair of 1.8-meter (5.9 feet) reflector telescopes atop Haleakalā volcano in Hawaii. Pan-STARRS constantly takes wide images of the sky, and then software compares them with older images, flagging anything that moves. Follow-up observations using the 3.6-meter (11.8 feet) Canada-France-Hawaii Telescope at Mauna Kea, Hawaii, on Sept. 17 helped astronomers calculate the comet's path.</p><h2 class="mb-4 text-xl font-bold md:text-2xl"><span>A cluster of comets</span></h2><figure class="relative mb-4"><div class="relative"><img alt="A bright green comet is pictured to the bottom left of a starfield against a black sky, with a long tail extending to the upper right of the screen." loading="lazy" width="960" height="540" decoding="async" data-nimg="1" class="rounded-lg" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/Hin8fn_gPpT1ggA4hrCkNw--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0MDtjZj13ZWJw/https://media.zenfs.com/en/space_311/762e1e7f46e74b927a1d11f28d50082d"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-4 size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-sm mt-1 pr-2.5"><div style="max-height:none;overflow:visible">Comet Lemmon captured on Sept. 20, 2025. | Credit: Dan Bartlett</div></figcaption></figure><p class="mb-4 text-lg md:leading-8 break-words">After a few barren years in the wake of <a href="https://www.space.com/comet-neowise-space-station-astronaut-photos.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Comet C/2020 F3 (NEOWISE);elm:context_link;itc:0;sec:content-canvas" class="link "><u>Comet C/2020 F3 (NEOWISE)</u></a>, six notable comets made their mark in 2024 and 2025. First, there was the "<a href="https://www.yahoo.com/news/devil-comet-12p-pons-brooks-143034392.html" data-ylk='slk:Devil Comet" 12P/Pons-Brooks";elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;' class="link  yahoo-link"><u>Devil Comet" 12P/Pons-Brooks" </u></a>(also dubbed the "<a href="https://www.esa.int/Space_Safety/Planetary_Defence/Mother_of_Dragons_comet_visible_in_the_night_sky" rel="nofollow noopener" target="_blank" data-ylk="slk:Mother of Dragons;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Mother of Dragons</u></a>" comet) in April 2024. Then came <a href="https://www.yahoo.com/news/comet-tsuchinshan-atlas-wows-skywatchers-173030012.html" data-ylk="slk:Comet C/2023 A3 (Tsuchinshan-ATLAS);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>Comet C/2023 A3 (Tsuchinshan-ATLAS)</u></a> in October 2024 and the bright <a href="https://www.yahoo.com/news/bright-comet-g3-atlas-seen-150000343.html" data-ylk="slk:C/2024 G3 (ATLAS);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>C/2024 G3 (ATLAS)</u></a>, the "New Year comet," which put on a great show for viewers in the Southern Hemisphere in January 2025. It was followed in mid-October by <a href="https://www.yahoo.com/news/articles/astrophotographers-capture-views-comet-c-210000558.html" data-ylk="slk:Comet C/2025 A6 (Lemmon);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>Comet C/2025 A6 (Lemmon)</u></a>, which reached the cusp of naked-eye visibility and, to a lesser extent, <a href="https://www.yahoo.com/news/articles/could-comet-c-2025-r2-140000020.html" data-ylk="slk:Comet C/2025 R2 (SWAN);elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>Comet C/2025 R2 (SWAN)</u></a>.</p><p class="mb-4 text-lg md:leading-8 break-words">That's not to mention <a href="https://www.space.com/astronomy/comets/new-interstellar-object-3i-atlas-everything-we-know-about-the-rare-cosmic-visitor" rel="nofollow noopener" target="_blank" data-ylk="slk:3I/ATLAS;elm:context_link;itc:0;sec:content-canvas" class="link "><u>3I/ATLAS</u></a>, only the third interstellar object ever to visit the solar system, after <a href="https://www.space.com/oumuamua.html" rel="nofollow noopener" target="_blank" data-ylk="slk:'Oumuamua;elm:context_link;itc:0;sec:content-canvas" class="link "><u>'Oumuamua</u></a> in 2017 and <a href="https://www.space.com/interstellar-comet-borisov-officially-from-beyond-solar-system.html" rel="nofollow noopener" target="_blank" data-ylk="slk:2I/Borisov;elm:context_link;itc:0;sec:content-canvas" class="link "><u>2I/Borisov</u></a> in 2019. 3I/ATLAS came closest to the sun on Oct. 29 during its trip through the solar system and then rapidly brightened, <a href="https://www.yahoo.com/news/articles/interstellar-invader-comet-3i-atlas-210000791.html" data-ylk="slk:baffling scientists;elm:context_link;itc:0;sec:content-canvas;outcm:mb_qualified_link;_E:mb_qualified_link;ct:story;" class="link  yahoo-link"><u>baffling scientists</u></a>.</p><p class="mb-4 text-lg md:leading-8 break-words">Will Comet C/2025 R3 (PanSTARRS) become a "great comet" in 2026? Only time will tell.</p></div>

In late April 2026, a long-period comet will swing through the inner solar system. It will likely be visible with binoculars, and there's a small chance it could be seen with the naked eye.

Will Comet C/2025 R3 (PanSTARRS) be the 'great comet' of 2026?

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