What Constellations Can You See From Estes Park?

From Estes Park, at about 40.4 degrees north, you can find constellations with your naked eyes in every season, and the anchor patterns around Polaris return in every season. Prominent in the evening means prominent in evening hours in that season.

Which patterns anchor the sky all year?

Ursa Major, Ursa Minor, Draco, Cassiopeia, and Cepheus are the northern patterns grouped around Polaris. EarthSky defines a circumpolar constellation as one that revolves around the celestial pole without dipping below the horizon during the night, and notes that which patterns qualify depends on latitude. EarthSky states Cassiopeia and Perseus are circumpolar from about 40 degrees north, and the Big Dipper is circumpolar at 41 degrees north and farther north. This post uses the Dipper, Polaris, and Cassiopeia as anchors only.

The Big Dipper is an asterism in Ursa Major, not a constellation. Its two outer bowl stars point to Polaris, the North Star. Polaris is the end star of the Little Dipper handle in Ursa Minor. Cassiopeia is a W shaped constellation opposite the Big Dipper across Polaris. From Polaris, a line to the outer star of the Cassiopeia W leads on to the Great Square of Pegasus. Learn those three first, because they anchor every hop in this post.

What can you see on winter evenings?

Winter evenings list Orion, Taurus, Gemini, Canis Major, Canis Minor, and Auriga. Orion is easiest to find by three bright stars in a line, Orion Belt. Betelgeuse is a giant red star at a shoulder. To find Canis Major, imagine a straight line through Orion Belt, move left and south to Sirius, the brightest star in the night sky. Follow the Belt stars to Aldebaran and the Pleiades, and follow a line from Rigel through Betelgeuse upward to Castor and Pollux. The winter night sky in Rocky Mountain National Park covers Orion and Sirius.

What can you see on spring evenings?

Spring evenings list Leo, Bootes, and Virgo, plus Ursa Major high overhead, with Cancer, Hydra, and Crater also listed. Leo shows the Sickle, a backward question mark shape, with Regulus at its base. Follow the curve of the Big Dipper handle to Arcturus in Bootes, then continue the arc on to Spica in Virgo. The saying is arc to Arcturus, speed on to Spica. Arcturus, Spica, and Regulus form the Spring Triangle, visible in the evening between March and May.

What can you see on summer evenings?

Summer evenings list Cygnus, Lyra, Aquila, Hercules, Scorpius, Sagittarius, and Ophiuchus. The Summer Triangle is Vega in Lyra, Deneb in Cygnus, and Altair in Aquila. At nightfall in northern summer, look east for Vega. Deneb is to the lower left of Vega, and Altair is to the lower right. Scorpius is a long string of bright stars with reddish Antares. Nine bright stars in Sagittarius make the Teapot shape. Find Hercules between Vega and Arcturus. Its Keystone is a wedge shaped pattern of four stars about one third of the way from Vega toward Arcturus, to the upper right of Vega. The Keystone is the most distinctive part of this faint constellation.

What can you see on autumn evenings?

Autumn evenings list Pegasus, Andromeda, Perseus, Aquarius, Capricornus, and Pisces, plus Cassiopeia high in the north. The Great Square of Pegasus has four stars of nearly equal brightness: Scheat, Alpheratz, Markab, and Algenib. Alpheratz belongs to Andromeda. To find the Square, star hop from the Big Dipper to Polaris, then to the outer star of the Cassiopeia W, then on to the Square. A line through Mirach and Mu Andromedae points to the Andromeda Galaxy, seen as a smudge to the unaided eye. Aquarius is best seen on a fall evening, just east of Capricornus, and the Great Square guides you toward it. Capricornus sits low in the south on late summer and early autumn evenings, shaped like an arrowhead. Draw a line from Vega through Altair to find it. For Pisces, look south of the Great Square for the Circlet, a small circle of faint stars. Pisces forms a V shape and needs a dark sky.

How do you find constellations without equipment?

Use the star hops above, a dark spot, and patience. Stellarium Mobile on Apple is free with in app purchases, and its listing states it identifies stars, constellations, planets, and deep sky objects in real time with night mode in red. Sky Tonight on Apple is free with in app purchases, and its listing states you point the device at the sky and use Time Machine and a calendar that includes lunar phases. For help under the real sky, see stargazing in Rocky Mountain National Park, and the Stargaze tour is a live offering.