Messier 73 is an asterism of four stars in the constellation of Aquarius. An asterism is composed of physically unconnected stars that appear close to each other in the sky as seen from Earth.
Eduard Schönfeld was a German astronomer.
X Sagittarii is a bright giant Cepheid variable star in the constellation Sagittarius.
Epsilon Ursae Minoris is a binary star system in the northern circumpolar constellation of Ursa Minor. It is visible to the naked eye with a combined apparent visual magnitude of 4.19. Based upon an annual parallax shift of 10.73 mas as seen from the Earth, it is located around 300 light years from the Sun. The pair are drawing nearer to the Sun with a radial velocity of −10.57 km/s.
Eta Volantis, Latinized from η Volantis, is a single star in the southern constellation of Volans. It has an apparent visual magnitude of 5.28, which is bright enough to be seen with the naked eye as a dim, white-hued star. Based upon parallax measurements, it is approximately 375 light years from the Sun. The star is moving further away from the Sun with a radial velocity of 20 km/s.
Karl Nikolaus Adalbert Krueger was a German astronomer. Born in Marienburg, Prussia, he was editor of Astronomische Nachrichten from 1881 until his death.
An R Coronae Borealis variable is an eruptive variable star that varies in luminosity in two modes, one low amplitude pulsation, and one irregular, unpredictably-sudden fading by 1 to 9 magnitudes. The prototype star R Coronae Borealis was discovered by the English amateur astronomer Edward Pigott in 1795, who first observed the enigmatic fadings of the star. Only about 150 RCB stars are currently known in our Galaxy while up to 1000 were expected, making this class a very rare kind of star.
HD 223229 is a suspected variable star in the northern constellation of Andromeda. It is a double star consisting of a magnitude 6.11 primary and a magnitude 8.73 companion. The pair have an angular separation of 0.80″ along a position angle of 250°, as of 2009. The primary is a B-type subgiant star with a stellar classification of B3IV. It has an estimated 6.3 times the mass of the Sun, with an effective temperature of 17,900 K.
HD 215114 is a double star in the equatorial constellation of Aquarius. As of 2012, the pair have an angular separation of 2.29″ along a position angle of 306.4°.
U Andromedae is a variable star in the constellation of Andromeda. It is a star of spectral type M6e, then it is classified as a Mira variable, and varies from an apparent visual magnitude of 9.0 at maximum brightness to a magnitude of 15.0 at minimum brightness, with a period of approximately 347 days. It was first observed to be variable by Thomas D. Anderson during 1894 and 1895.
A total solar eclipse occurred on Thursday, August 29, 1867. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Totality occurred across central Argentina and the southern Atlantic ocean.
126 Tauri is a blue subgiant star in the constellation Taurus. Its apparent magnitude is 4.83. It is also a binary star, with an orbital period of 111 years.
Be Stars are a heterogeneous set of stars with B spectral types and emission lines. A narrower definition, sometimes referred to as Classical Be Stars, is a non-supergiant B star whose spectrum has, or had at some time, one or more Balmer emission lines.
NGC 956 is what appears to be an open cluster in the constellation Andromeda. The object was found on December 23, 1831 by the British astronomer John Herschel. However, an analysis in 2008 led to the conclusion that this "object" was merely an alignment of stars, appearing to be an open cluster.
Adolph Christian Wilhelm Schur, RAS Associate was a German astronomer and professor of astronomy at the University of Göttingen. He held important positions at multiple observatories throughout his career, namely deputy director of the Strasbourg Observatory and director of the Göttingen Observatory. His main work was in astrometry, although he focused on publishing astronomical catalogues in his later life.
