Best Constellations to See in October
This guide highlights seven of the best constellations to see on October evenings: Piscis Austrinus, Grus, Pegasus, Aquarius, Cepheus, Lacerta, and Octans. Pegasus and Piscis Austrinus are among the easiest to recognize, while Lacerta and Octans are much fainter and benefit from dark skies. Grus and Octans are especially well placed for observers in the Southern Hemisphere. Use the free Star Walk 2 app to locate any of these constellations easily.
Contents
- October constellations: quick reference
- Which October constellations are best for each hemisphere?
- More to see in the October 2026 night sky
- Best October constellations and stars: key takeaways
October constellations: quick reference
The constellations featured in this guide are considered best seen in October because they reach their highest point in the sky around 9 p.m. local time. They are not the only constellations visible during the month, but October evenings provide especially favorable conditions for observing them.
The constellations are listed from the most prominent to the faintest in the evening sky:
- ☆☆☆ — bright and relatively easy to recognize.
- ☆☆ — moderately bright; visible with some effort.
- ☆ — faint; best seen under dark skies, binoculars may help.
| Constellation | Visibility | Brightest star | How to find it |
|---|---|---|---|
| Piscis Austrinus | 50°N to 90°S | Fomalhaut | Find bright Fomalhaut south of Aquarius. |
| Grus | 35°N to 90°S | Alnair | Look south of Piscis Austrinus for a line of stars extending from near Fomalhaut. |
| Pegasus | 90°N to 60°S | Enif | Find the large Great Square of Pegasus in the evening sky. |
| Aquarius | 65°N to 90°S | Sadalsuud | Look north of Fomalhaut for the faint Water Jar asterism. |
| Cepheus | 90°N to 10°S | Alderamin | Look between Polaris and the W-shaped constellation Cassiopeia. |
| Lacerta | 90°N to 35°S | Stellio | Search for a faint zigzag between Cygnus and Andromeda. |
| Octans | 5°S to 90°S | Nu Octantis | From the Southern Hemisphere, look around the south celestial pole. |
The latitude ranges are approximate and refer to the practical visibility of each constellation’s main pattern; individual stars may remain visible outside them.
List of October constellations and their stars
Piscis Austrinus
- Brightness: ☆☆☆
- Visibility range: 50°N to 90°S
- Brightest star: Fomalhaut (mag 1.2)
- Notable deep-sky objects: NGC 7314 (galaxy, mag 10.5)
How to find Piscis Austrinus in October
In the Northern Hemisphere, look low above the southern horizon for bright Fomalhaut, the brightest star in the constellation. The rest of the constellation forms a small, faint pattern south of Aquarius.
In the Southern Hemisphere, Piscis Austrinus appears much higher in the sky and, from many locations, culminates in the northern part of the sky.
Viewing tip: Fomalhaut is a reliable naked-eye landmark in autumn (or spring in the southern latitudes). It stands out against the background of rather dim stars in this part of the sky. From northern latitudes, it stays low, so choose a place with an open horizon. Farther south, it climbs much higher and remains visible for a longer period.
Piscis Austrinus: mythology
The constellation Piscis Austrinus represents a fish. In Greek sky lore, it was known as the Great Fish and was depicted drinking the stream of water poured by Aquarius. The bright star Fomalhaut marks the mouth of the fish — this is what its name means in Arabic.
The two fish represented by the constellation Pisces were sometimes said to be the offspring of the Great Fish.
Grus
- Brightness: ☆☆☆
- Visibility range: 35°N to 90°S
- Brightest star: Alnair (mag 1.7)
- Notable deep-sky objects: NGC 7424 (galaxy, mag 11)
How to find Grus in October
From the Southern Hemisphere, start with bright Fomalhaut in Piscis Austrinus, then look south and slightly west for a line of stars forming the Crane’s long neck. The bright star Alnair (Alpha Gruis) marks one of the constellation’s most noticeable points.
From the Northern Hemisphere, look very low above the southern horizon, below Piscis Austrinus. A clear, unobstructed horizon is essential, and much of the constellation may be difficult to see from higher northern latitudes.
Grus: mythology
There are no traditional myths associated with the Grus constellation. It was created by European explorers and cartographers who mapped the far-southern sky in the late 16th century and first appeared in a major celestial atlas in Johann Bayer’s Uranometria in 1603.
Interestingly, in the early 17th century, the constellation was briefly called Phoenicopterus, Latin for “flamingo,” before the name Grus — “the crane” — became established. The crane has symbolized grace, watchfulness, and long journeys in many cultures, an especially fitting image for a constellation charted during the great age of sea exploration.
Pegasus
- Brightness: ☆☆☆
- Visibility range: 90°N to 60°S
- Brightest star: Enif (Epsilon Pegasi, mag 2.4)
- Notable deep-sky objects: Great Pegasus Cluster (M15, mag 6.2), Stephan’s Quintet (galaxy group, members mag 13–15)
How to find Pegasus in October
Pegasus is easy to spot by the Great Square asterism — four stars forming a large diamond in the evening sky. The corners are Markab, Scheat, Algenib, and Alpheratz (the last belongs to Andromeda but completes the Square). To the west of the Square, the brightest star of the constellation Enif (Epsilon Pegasi) marks the horse’s muzzle; a short line of stars links Enif back toward the Square as the neck.
From the Northern Hemisphere, look high in the eastern to southeastern sky after dark. Once you find the Great Square, look west of it for Enif.
From the Southern Hemisphere, look toward the northern to northeastern sky. The Great Square appears lower and may look tilted, with Enif lying west of it.
If you already know Cassiopeia, its distinctive W-shaped pattern can also help you find the area: look south of Cassiopeia toward Andromeda, and you’ll come to the Great Square of Pegasus.
Pegasus: mythology
Pegasus is the winged horse of Greek mythology. He springs from the blood of Medusa when Perseus cuts off her head. Some versions add that the blood mixes with sea foam.
Many stories link Pegasus to Perseus and Andromeda. In one version, Perseus rides Pegasus to rescue Andromeda. In another, he flies with Hermes’ winged sandals instead.
Pegasus is best known as the mount of Bellerophon. With a golden bridle from Athena, Bellerophon tames the horse and defeats the Chimera. Later, he tries to fly to Olympus. Zeus sends a gadfly to sting Pegasus; the horse rears, Bellerophon falls, and Pegasus rises safely to the gods. There he carries Zeus’s thunderbolts and is placed among the stars as the constellation Pegasus.
Aquarius
- Brightness: ☆☆
- Visibility range: 65°N to 90°S
- Brightest star: Sadalsuud (mag 2.9)
- Notable deep-sky objects: Saturn Nebula (NGC 7009, mag 8), Helix Nebula (NGC 7293, mag 7.3)
How to find Aquarius in October
Aquarius is a faint constellation with only a few bright stars, so choose a dark, moonless night to observe it. It lies between Capricornus and Pisces and belongs to the zodiac, so the Sun, Moon, and planets can pass through it.
From the Northern Hemisphere, face south and look for a faint, spread-out pattern. The Water Jar asterism — a small Y-shaped pattern of four stars — will help you identify the constellation.
From the Southern Hemisphere, Aquarius appears much higher in the sky. Use bright Fomalhaut in Piscis Austrinus as a landmark; Aquarius lies just north of it.
Aquarius: mythology
Aquarius is depicted as the Water-Bearer. In Greek myth, it represents Ganymede, a handsome Trojan shepherd. Zeus fell in love with the boy and carried him to Olympus — either in the form of an eagle or by sending his eagle, Aquila. Ganymede became the cupbearer of the gods, serving wine and nectar.
In many depictions of Aquarius, water pours from his jar. The stream is said to feed the Great Fish (Piscis Austrinus) and to signal the rainy season. To honor Ganymede, Zeus placed the Water-Bearer among the stars as Aquarius.
Cepheus
- Brightness: ☆☆
- Visibility range: 90°N to 10°S
- Brightest star: Alderamin (mag 2.5)
- Notable deep-sky objects: Iris Nebula (NGC 7023, mag 6.8)
How to find Cepheus in October
Cepheus lies near the north celestial pole, between Cassiopeia and Polaris. Its five main stars form a distinctive shape resembling a child’s drawing of a house.
From the Northern Hemisphere, look toward the northern sky. From about 40°N and farther north, Cepheus is circumpolar, remaining above the horizon throughout the night and all year round.
From the Southern Hemisphere, Cepheus appears very low above the northern horizon and is visible only from relatively low southern latitudes. Farther south, most or all of its main pattern remains below the horizon.
Cepheus: mythology
The constellation Cepheus is named after the mythical king of Aethiopia, husband of Cassiopeia, and father of Andromeda. After his death, it is said that Zeus placed him among the stars because he was descended from the nymph Io, one of Zeus’ favorites. The entire royal family, along with Pegasus and Perseus, appears in the autumn sky.
Lacerta
- Brightness: ☆
- Visibility range: 90°N to 35°S
- Brightest star: Stellio (Alpha Lacertae, mag 3.8)
- Notable deep-sky objects: NGC 7243 (open cluster, mag 6.4)
How to find Lacerta in October
Lacerta lies in a relatively dark part of the sky between Cygnus and Andromeda, with Cassiopeia and Cepheus to the north and the Great Square of Pegasus to the south. Its faint stars form a small zigzag often compared to a “little W,” echoing the much brighter W-shaped Cassiopeia nearby.
From the Northern Hemisphere, look high in the northern to northeastern sky. Use Cygnus and Cassiopeia as your main landmarks, then search the darker region between them.
From the Southern Hemisphere, Lacerta appears low above the northern horizon and is best seen from lower southern latitudes. A clear horizon and dark sky will help reveal its faint stars.
Lacerta: mythology
Lacerta was introduced by Johannes Hevelius in 1687 and depicted in his star atlas published posthumously in 1690. It has no ancient myth associated with it. Its name means “lizard” in Latin, referring to the constellation’s small, winding pattern of stars.
Octans
- Brightness: ☆
- Visibility range: 5°S to 90°S
- Brightest star: Nu (ν) Octantis (mag 3.7)
- Notable deep-sky objects: NGC 7098 (mag 11.3)
How to find Octans in October
Octans surrounds the south celestial pole and is a faint constellation with no prominent star pattern. Its brightest star, Nu (ν) Octantis, shines at only about magnitude 3.7, so dark skies are helpful.
From the Southern Hemisphere, face south and first locate the south celestial pole. One common method is to use the Southern Cross (Crux): draw an imaginary line along the Cross’s long axis toward the foot of the Cross, and extend it about four and a half times. Octans surrounds this area. The faint star Sigma Octantis (mag 5.5) lies close to the pole, but unlike Polaris in the north, it is too dim to serve as an obvious naked-eye landmark. An astronomical app can help you trace the constellation’s faint stars.
From the Northern Hemisphere, Octans is not visible from most locations. Only observers very close to the equator may see part of the constellation extremely low above the southern horizon.
Octans: mythology
Octans has no ancient mythology. It was introduced in the 18th century by French astronomer Nicolas-Louis de Lacaille and named after the octant, a navigational instrument used to measure the altitude of celestial objects. Like several other constellations created by Lacaille, Octans represents a scientific instrument rather than a mythological figure.
Which October constellations are best for each hemisphere?
In the Northern Hemisphere, the best-placed October constellations from this list include Pegasus, Cepheus, Lacerta, Aquarius, and Piscis Austrinus. Pegasus is especially easy to recognize by its Great Square, while Cepheus is well placed high in the northern sky.
In the Southern Hemisphere, Grus, Piscis Austrinus, Aquarius, and Octans are especially well placed. Grus and Piscis Austrinus appear high in the sky, while Octans surrounds the south celestial pole. Pegasus is also visible toward the northern part of the sky.
More to see in the October 2026 night sky
The New Moon on October 10 provides the darkest skies of the month, making the nights around this date especially good for observing faint constellations and deep-sky objects. The Full Moon occurs on October 26 and is traditionally known in the Northern Hemisphere as the Hunter’s Moon. Other main lunar phases are the Last Quarter on October 3 and the First Quarter on October 18. Find the exact times in our Moon Calendar.
Several notable events occur in October 2026:
- October 4: Saturn reaches opposition, shining at magnitude 0.3 and remaining visible throughout the night.
- October 6: The Moon passes extremely close to Jupiter. A lunar occultation of Jupiter will be visible from parts of Africa, the Americas, and several Atlantic islands.
- October 8–9: The Draconid meteor shower peaks under excellent conditions, with the Moon only about 3% illuminated. The shower typically produces around five meteors per hour and is best seen from the Northern Hemisphere.
- October 12: Mercury reaches its greatest eastern elongation, appearing about 25° from the Sun. Evening visibility is especially favorable from the Southern Hemisphere, while from northern mid-latitudes Mercury stays much lower in twilight.
- October 21–22: The Orionid meteor shower reaches its peak, producing up to about 20 meteors per hour. The waxing gibbous Moon will interfere early in the night, but darker skies return after it sets, making the hours before dawn the best time to watch.
Best October constellations and stars: key takeaways
October offers a varied mix of bright and faint constellations. In the Northern Hemisphere, start with the Great Square of Pegasus, then use nearby Cassiopeia, Cepheus, and Cygnus to help locate the fainter constellation Lacerta. Farther south, bright Fomalhaut provides an excellent landmark for finding Piscis Austrinus and Aquarius.
In the Southern Hemisphere, Piscis Austrinus and Grus are especially well placed, while Octans circles the south celestial pole but is much harder to trace because of its faint stars. Pegasus and Aquarius are also visible toward the northern part of the sky.
For the faintest constellations, choose a dark, moonless evening around 9 p.m. local time. To locate any of these constellations, open the free Star Walk 2 app, enter the constellation’s name in the search field, and follow the arrow on the sky map.
