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Comet Lemmon-also called C/2025 A6 (Lemmon)-on Thursday, October 16, 2025, will shine near a bright star, making the best chance so far to get his eyes with a glamorous comet. The star, Cor Caroli, can easily be found near the Big Dipper, one of the most famous shapes of the stars in the night sky. There may also be an opportunity to find Comet Swan – C/2025 R2 (Swan) – in the southwest after sunset.
Comet Tsuchinshan-Atlas appears above the eastern mountains of Sierra as he goes to the evening sky shortly after the sunset, as shown by the Ancient Pine Forestry area Bristlecone, on October 12, 2024 near Big Pine, California. (Photo by David McNew/Getty Images)
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Basic events
On Thursday, October 16, 2025, Comet Lemmon will be visible both after sunset and before sunrise near the Big Dipper, with the best time looking at about 90 minutes after dusk.
Comet Lemmon quickly approaches the earth, but there is no danger. At the nearest Tuesday, October 21, it will still be 55.4 million miles (89.2 million kilometers) from Earth.
Comet Lemmon was discovered on January 3, 2025, by the Mount Lemmon research near Tucson, Arizona. Astronomers have calculated since then that it takes about 1,350 years of land to complete a orbit of the sun, but its narrow passage to Jupiter on the road in the inner solar system this year has saved some action, according to Space.comcausing to reduce its orbit to 1,150 years.
An easy way to find the position of the comets is to use Finder charts in In-the-sky.com or Stargazing applications such as Sky, Stellarium and Skysafari.
Comet Lemmon can see before dawn on October 16th-The best time will be 5: 39-6: 09 AM. Edt.
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When and where to see comets
The best time to locate Comet Lemmon and Comet Swan on Thursday, October 16th is during a 30 -minute window that starts about 90 minutes after sunset where you are. Both are visible after the sunset, but in the opposite parts of the sky – Lemmon in the northwest, swan in the southwest. For New York, where the sunset is at 6:11 pm Edt, the ideal time for evening screening is 7: 41-8: 11 pm Edt.
Comet Lemmon can also see before dawn. Look during a 30 -minute window that starts about 90 minutes before sunrise. At the sunrise at 7:09 am EDT in New York, the best time will be 5: 39-6: 09 am Edt-though previous observations may also reveal the comet growing in the northeast.
The best time to see Comet Lemmon on October 16 will be 90 minutes after sunset.
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How to find Comet Lemmon
Distance from the sun: 69.6 million miles (111.9 million kilometers)
Distance from Earth: 58.8 million miles (94.6 million kilometers)
The Green Comet Lemmon is now moving to about four degrees of the night sky every day and is currently in the constellation Ursa Major – hosting the Big Dipper.
Before sunrise, the comet is visible in the northeast. The Big Dipper handle will show on the horizon. Look at the right side of the stars of Alkaid and Mizar at the end of the handle and you will find the Lemmon just above the Cor caroli stars in the simple two -star constellation of Canes Venatici. From New York, it will rise to about 16 degrees – about the range of your stretched hand – at 5:39 am. Edt, as Aphrodite goes up east and rises higher as dawn approaches.
After sunset on Thursday, October 16, search for Comet Lemmon just below the Big Dipper curve. It will be on the upper left side of Cor Caroli in Canes Venatici. Its height above the horizon varies depending on the location, but from New York will appear about 11 degrees above the northwest horizon at 7:41 pm. Edt – about the width of the four fingers held along the ARM length – and will gradually sink as the Twilight deepens.
The best time to see Comet Swan on October 16 will be 90 minutes after sunset.
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How to find the comet swan
Distance from the Sun: 85.4 million miles (137.5 million kilometers)
Distance from Earth: 25 million miles (40.3 million kilometers)
The Blueish-Green Comet Swan-discovered only in September-will be visible in binoculars on Thursday, October 16, 2025, low in the southwest after sunset. Swan will be above the famous joke of the constellation and under the famous “summer triangle” of three light stars. The comet will be in front of the galaxy, so you expect to be visible dense starfields behind the comet in binoculars. From New York will appear about 24 points above the northwestern horizon at 7:41 pm. Edt.
How to find Cor caroli and comet
Comet Lemmon will find himself very close to Cor Caroli, a double star about 115 light years from the sun whose name means “heart of Charles”. To find it, find the seven stars of the Big Dipper in the North Sky. At the end of the handle is Alkaid. Look at Alkaid’s side – about the same distance as the handle is great – and you will come to Cor caroli. Is said To shine vigorously at night, King Charles II returned to England on May 29, 1660, to restore the monarchy after the English Civil War.
How bright are comets?
THE Database of County Observation He says Comet Lemmon will shine in size +5.2 and Swan comet a little dimmer in size +5.9. Both have increased significantly over the last nights, but they are not bright enough to look naked.
To see either the comet, for the time being, you will need an 8×42 or 10×50 binoculars, or the like, with Comet Lemmon the easiest to see. They will appear as diffuse light patches, with locations away from street lamps and urban light pollution that gives you the best views.
Check my food Every day this month for a daily “comet tracker” with Finder charts and tips on promoting Comet Lemmon from mid -Northern Britain.
