61 Cygni A: V1803 Cygni, HD 201091, HIP 104214,
HR 8085, BD+38°4343, LHS 62, SAO 70919[6]
61 Cygni B: HD 201092, HIP 104217, HR 8086, BD+38°4344, LHS 63[7]
Database references
SIMBAD
The system
A
B
61 Cygni/ˈsɪɡni/ is a binary star system in the constellation Cygnus, consisting of a pair of K-type dwarf stars that orbit each other in a period of about 659 years. Of apparent magnitude 5.20 and 6.05, respectively, they can be seen with binoculars in city skies or with the naked eye in rural areas without light pollution.
61 Cygni first attracted the attention of astronomers when its large proper motion was first demonstrated by Giuseppe Piazzi in 1804. In 1838, Friedrich Bessel measured its distance from Earth at about 10.4 light-years, very close to the actual value of about 11.4 light-years; this was the first distance estimate for any star other than the Sun, and first star to have its stellar parallax measured. Among all stars or stellar systems listed in the modern Hipparcos Catalogue, 61 Cygni has the seventh-highest proper motion, and the highest among all visible stars or systems.[note 1][16][17]
Over the course of the twentieth century, several different astronomers reported evidence of a massive planet orbiting one of the two stars, but recent high-precision radial velocity observations have shown that all such claims were unfounded.[18] No planets have been confirmed in this stellar system to date.
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^"SIMBAD Query Result: ADS 14636 AB -- Double or multiple star". SIMBAD. Centre de Données astronomiques de Strasbourg. Archived from the original on 1 February 2014. Retrieved 3 February 2019. (61 Cygni)
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^Hipparcos: Catalogues: The Millennium Star Atlas: The Top 20 High Proper Motion Archived 28 April 2021 at the Wayback Machine, European Space Agency, retrieved 2019-06-27
^Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (2006). "Detection limits from the McDonald Observatory planet search program". Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
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61Cygni /ˈsɪɡni/ is a binary star system in the constellation Cygnus, consisting of a pair of K-type dwarf stars that orbit each other in a period of...
parallax measurements in 1832–1838, for the stars Alpha Centauri, Vega, and 61Cygni. Throughout the year the position of a star S is noted in relation to other...
binaries include 61Cygni (a binary in the constellation Cygnus, composed of two K class (orange) main-sequence stars, 61Cygni A and 61Cygni B, which is...
in 1838, who used this approach to calculate the 3.5-parsec distance of 61Cygni. The parallax of a star is defined as half of the angular distance that...
catalogue are sometimes indicated by the Greek letter sigma, Σ. Thus, 61Cygni is also designated as Σ2758. Since most double stars are true binary stars...
stellar parallax. In 1838 he published a parallax of 0.314 arcseconds for 61Cygni, which indicated that the star is 10.3 ly away. Compared with the current...
This PMa offset between 61 Cyg A and B points at the possible presence of a third body in the system, likely orbiting around 61 Cyg B. Pinamonti, M.; Damasso...
there are "nearly twenty-five million inhabited planets in the Galaxy". 61Cygni A star system advanced by Lord Dorwin as the potential site for a planet...
than zero by measuring the parallax of 0.314 arcseconds of a star named 61Cygni. In the same year Friedrich Georg Wilhelm Struve and Thomas Henderson measured...
16 Cygni A and 16 Cygni B, together with a red dwarf, 16 Cygni C. In 1996 an extrasolar planet was discovered in an eccentric orbit around 16 Cygni B....
the naked eye (conservatively limiting unaided visual magnitude to 6.0), 61Cygni A (magnitude V=5.20) has the highest proper motion at 5.281″ yr−1, discounting...
the German astronomer Friedrich Bessel. He showed that the star system 61Cygni had a parallax of just 0.31 arcseconds (compared to the modern value of...
generation ships were deployed to colonise a planet orbiting the star 61Cygni (this becomes a major segment of the plot of Chasm City). The flotilla...
mass into interstellar ships containing Corrupted warriors. Kira flees to 61Cygni on a shuttle and discovers that the Wranaui have started a war with humanity...
astronomer Friedrich Wilhelm Bessel measured the parallax of the star 61Cygni successfully, and disproved Ptolemy's claim that parallax motion did not...
the early 1900s. The first direct measurement of the distance to a star (61Cygni at 11.4 light-years) was made in 1838 by Friedrich Bessel using the parallax...
motions of stars to find parallax measurement candidates. One of them, 61Cygni, was specially appointed as a good candidate for measuring a parallax,...
1839 after Bessel released his own accurately determined parallax for 61Cygni in 1838. For this reason, Alpha Centauri is sometimes considered as the...
Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg. α Cygni (Latinised to Alpha Cygni) is the star's designation...
Friedrich Bessel discovered a parallax of 0.314 arcseconds of the star 61Cygni. According to Owen Gingerich and Christopher Linton, these tables were...
Friedrich Bessel discovered a parallax of 0.314 arcseconds of the star 61Cygni). The Copernican explanation for this lack of parallax was that the stars...
1 (or Icarus) — second most distant star, 9 billion light years away. P Cygni — suddenly brightened in the 17th century WNC4 — Messier Object 40 Zeta...