Observations Under Suburban Skies
OR Delphini, also known as Struve 2725, is a binary star in the constellation Delpinus. With a wider eyepiece, one can view this binary and the double star Gamma Delphini together, making a notable double-double that shouldn’t be missed.
The star is also known as Struve 2725, SAO 106466, HD 197913, HIP 102490, OR Del
Childhood memories and ancient starlight meet under the vast Colorado sky.
The constellation Cygnus features the binary star 17 Cygni, located 69 light-years away. Composed of two stars, 17 Cygni A and B, it is faintly visible to the naked eye. This complex system, along with another binary pair, showcases intriguing dynamics reminiscent of a cosmic dance in the night sky. Also known as: SAO 68827, 17 Cyg, HR 7534, HD 187013, HIP 97295, STF 2580
The constellation Ophiuchus features the binary star 61 Ophiuchi, a bright pair visible through small telescopes. Discovered by Herschel in 1781, it is cataloged as STF 2202. The stars, classified as hot and white, exhibit an angular separation of 20.7 arcseconds, making them accessible and visually appealing to amateur astronomers. Also known as 61 Oph, Struve 2202, STF 2202, SAO 122690, HD 161270, HR 6609, HIP 86831
Follow a lifetime of stargazing through ten historic telescopes, from Galileo’s first refractor to the Hale, that reshaped our vision of the universe.
Messier 22 (M22) is a bright and nearby globular cluster in Sagittarius, notable for its unique features such as a planetary nebula and two black holes. Discovered by Abraham Ihle in 1665 and later cataloged by Charles Messier in 1764, M22 provides insights into the early Milky Way and is ideal for observation. Also known as NGC 6656.
In the vast expanse of our Milky Way galaxy, amidst a sea of stars, lies an ethereal celestial beauty known as Messier 17 (M17), or more commonly, the Swan Nebula. Named after its graceful swan-like appearance, this stellar nursery lies in the summer southern constellation of Sagittarius.
Struve 2007 (STF 2007) is a double star in Serpens Caput, first documented in 1823. The closer AB pair features a yellowish-white primary and a blue secondary, while an AC component forms a wider triple. It’s visually appealing and accessible for telescopic observation, particularly noted for its striking colors and separation. Also known as SAO 101922, HD 144563, HIP 78873, STF 2007.
The Garden Astronomer