Mercury will reach its highest altitude in the pre-dawn sky on the day of the Hunter's Moon.

On the night of the full moon, Mercury will be visible before sunrise and at an altitude high enough to make it easier for watchers in the northern latitudes.

According to the U.S. Naval Observatory, the moon will become full on October 9. On that day, the moon will rise at 6:34 p.m. and set at 7:44 a.m. The moon will rise about 9 minutes after the sun sets. The glare of the moon makes many nearby objects hard to see, so it will be mostly overshadowed by the constellation.

There are planets in the night sky.

The moon will reach a maximal altitude in New York City at 1:01 a.m. on October 10 because it is autumn in the Northern hemisphere. When one moves south, the moon's altitude will increase until it reaches a maximum near the equator, and then it will lose altitude again. The moon will reach 70 degrees in Miami on October 10.

The moon crosses the equator on Oct. 10 at 12:20 a.m. The maximum elevation of the full moon on October 10 will be 49 degrees.

Mercury greatest elongation

Graphic showing planet Mercury against the black backdrop of space.

Mercury will reach its highest altitudes for Northern Hemisphere observers on Oct. 9 and 10 (Image credit: Starry Night Software)
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Mercury will be at its highest altitudes in October. The sun rises at 6:59 a.m. while Mercury rises at 5:26 a.m. The planet will be 17 degrees high by sunrise. The planet will be a bit dimmer than the star. Civil twilight is when the sun is below the horizon and the sky is getting light. Mercury will be just south of east at that point.

To find Mercury, one can look for the "sickle" shape of stars that mark the head of the lion, which will be high in the east. Mercury will form a triangle with Regulus to the right and Denebola to the left.

Mercury will only be 15 degrees above the horizon at sunrise from the south, and 7 degrees from the north.

Other visible planets in October

When Venus is on the opposite side of the sun from Earth, it will be hard to see.

On the night of October 9th, Mars rises in New York at 9:44pm. The Red Planet will be to the left of Aldebaran as it rises in the sky.

The moon passes 2 degrees south of Jupiter on Oct. 8 at 2:11pm. It goes all the way up to the Eastern time zone. The planet will be to the right of the moon by the next day. On October 9th, Jupiter rises in New York at 5:54 p.m. The fainter stars of the fish will be able to see Jupiter's bright light.

The morning of October 10 is when the moon sets in New York. The planet itself is more distinct because it is in a constellation. By 10 p.m., the sun will be above the horizon. The moon and Jupiter will form a rough line across the southern sky from mid-northern latitudes.

October stars and constellations

three bright stars are arranged in a triangle formation in the night sky. Some meteor streaks are visible across the image and the Milky Way stretches across the backdround.

The Summer triangle and meteors were captured in this photograph taken from Grünstadt, Germany. (Image credit: davidhajnal via Getty Images)
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The Summer Triangle can still be seen at 10 p.m. on October 9, but it is in the western half of the sky. The "eye" of the Eagle will be to the left of Vega. Fomalhaut, the alpha star in Piscis Austrinus, the Southern Fish, will be seen if you move left. Fomalhaut will be on the left side of the planet.

The Charioteer, in Auriga, will be rising as the winter stars start to fall. The "W" of Cassiopeia is visible to the north and to the east from Capella. If you draw a line from the middle peak of the "W" to the left and downwards, you can reach Polaris. As the hours go on, the Big Dipper will become more prominent.

How the "Hunter's Moon" got its name

The full moon of October, sometimes referred to as the Hunter's Moon, rises over the small Portuguese village of Montes Altos in this photo by José Zarcos Palma. He captured this photo from a hilltop in the nearby town of Moreanes on Oct. 24, 2018.

The full moon of October, sometimes referred to as the Hunter's Moon, rises over the small Portuguese village of Montes Altos in this photo by José Zarcos Palma. He captured this photo from a hilltop in the nearby town of Moreanes on Oct. 24, 2018.  (Image credit: Courtesy of José Zarcos Palma)

According to the Old Farmer's Almanac, the Hunter's Moon is when the hunting season starts. The Ojibwe people call October's full moon the "Mskawji Giizis," or the Freezing Moon, because October is when the first frosts occur in their area. In North America, bird species migrate south for the winter in mid-autumn.

The Tlingit called the October full moon "Ds Tlein", while the Haida called the moon "Kalk Kungaay", according to the Tlingit Moon and Tide Teaching Resource.

The 9th lunar month is called Jyu and it is when the flower of that name tends to bloom. The start of the Jewish holiday of sukkah will coincide with the full moon, which is when the Israelites were called to go to the Temple in Jerusalem. Jewish people celebrate by building a temporary structure called a sukkah in which meals are served and sleeping in it to remember the temporary homes they lived in during their time in the desert after escaping from Egypt.

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