100 Herculis is a close binary star of two equally bright stars like diamonds on black velvet. The binary lies in the constellation Hercules and is enjoyed on summer nights.
Tag Archives: Summer
Struve 2404: A Tight, Attractive Orange-Red and Yellow Double in Aquila
Struve 2404 is a tight attractive double star in the summer constellation of Aquila, which lies on the celestial equator. The Russian astronomer Otto Wilhelm von Struve first recorded an observation of this pair in 1822.
This pair features a magnitude +6.9 primary star with a beautiful warm orange hue. The orange-red giant star has a stellar classification of K5III and is nearly 60 times the diameter of our sun! The secondary star lies closely by at 3.6 arcseconds away and shines at a magnitude of +7.8. The pair also known as STF 2404, HD 174569, SAO 104170, HR 7099.
NGC 6709: An 8-Bit Game Character in Aquila’s Star Cluster
NGC 6709 is located in the constellation Aquila (the Eagle) best viewed on late summer and early autumn nights. This congregation of stars was first documented by the renowned astronomer William Herschel in 1784. One may not find much written about the cluster, but this fact doesn’t diminish its attractiveness. Approximately 300 stars make upContinueContinue reading “NGC 6709: An 8-Bit Game Character in Aquila’s Star Cluster”
Epsilon Sagittae: A Warm Yellow and Pale Blue Double Star in Sagitta
On August 19, 1780, astronomer William Herschel discovered Epsilon Sagittae, a double star in the Sagitta constellation. It features a visible primary star with a magnitude of +5.7 and a fainter companion. Best viewed in summer, this pair showcases a golden-yellow and blue hue contrast for observers using binoculars or telescopes. Also known as SAO 105061, HD 185194, 4 Sagittae, Eps Sge, HIP 96516, HR 7463, H VI 26.
Epsilon Equulei (Struve 2737): A Quaint Star System of Yellow and Violet in Equuleus
The delicate and pretty magnitude 5 triple star Epsilon Equulei shines down from the constellation Equuleus on late summer and autumn nights. Learn more about this pretty star and see what it looks like through a backyard telescope.
Struve 2679: A Quaint Triangle Star System in Delphinus
The constellation Delphinus boasts a variety of nice celestial objects, including Struve 2679, a multiple-star system that is visible during late summer and early autumn nights. It makes a small triangle.
Struve 2690 (15 Delphini): A Quaint Multiple Star System in the Dolphin’s Tail
15 Delphini, also known as Struve 2690, is a multiple-star system that is visible during late summer and autumn nights. Most observers will see a quaint pair of equally bright stars in the tail of the constellation Delphinus, but more star lurk nearby!
NGC 6811: A Smoke Ring of Stars in the Constellation Cygnus
The star cluster NGC 6811 in Cygnus has a unique dark center that some people call “The Hole in the Cluster,” making this a great target for backyard astronomers.
The Garden Astronomer 