Reticulum
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| Constellation | |
| Reticulum | |
| Abbreviation | Ret |
|---|---|
| Genitive | Reticuli |
| Pronunciation | /rɪˈtɪkjʊləm/, genitive /rɪˈtɪkjʊlaɪ/ |
| Symbolism | the Reticle |
| Right ascension | Template:RA–Template:RALua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found. |
| Declination | −52.7470779°–−67.2479248°Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found. |
| Quadrant | SQ1 |
| Area | 114 sq. deg. (82nd) |
| Main stars | 4 |
| Bayer/Flamsteed stars | 11 |
| Stars with planets | 7 |
| Stars brighter than 3.00m | 0 |
| Stars within 10.00 pc (32.62 ly) | 2 |
| Brightest star | α Ret (Rhombus) (3.33m) |
| Nearest star | WISE 0350−5658[1]Template:Rp |
| Messier objects | none |
| Bordering constellations | Horologium Dorado Hydrus |
| Visible at latitudes between +23° and −90°. Best visible at 21:00 (9 p.m.) during the month of December. | |
Reticulum is a small, faint constellation in the southern sky. Its name is Latin for a small net, or reticle—a net of crosshairs at the focus of a telescope eyepiece that is used to measure star positions.[2] The constellation is best viewed between October and December, and save for one main star visible in ideal conditions, cannot be seen from north of the 30th parallel north.[3]
History
A constellation in this area was introduced by Isaac Habrecht II in his celestial globe in 1621, who named it Rhombus.[4] It was replaced with a somewhat different constellation by the French astronomer Nicolas Louis de Lacaille in the eighteenth century; during his stay at the Cape of Good Hope, he named the constellation le Réticule Rhomboide to commemorate the reticle in his telescope eyepiece.[5] The name was later Latinized to Reticulum in his star catalogue Coelum Australe Stelliferum. In 1810, the stars of Reticulum were used by William Croswell to produce the constellation Marmor Sculptile, which represented the bust of Christopher Columbus, but this did not catch on among astronomers.[6]
The constellation Reticulum became officially recognized during the First General Assembly of the International Astronomical Union in 1922. The boundary for this and other constellations was drawn up by Belgian astronomer Eugène Delporte along arcs of right ascension and declination for epoch 1875. These were published in 1930 in the Delimination Scientifique des Constellations at the behest of the IAU.[7][8]
Features
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Lacaille gave 10 stars Bayer designations Alpha through Iota in 1756 and labelled two stars as Zeta. In 1879, Benjamin Gould added Kappa Reticuli as he felt the star was bright enough to warrant a name.[9]
Only two of the stars in this constellation are brighter than visual magnitude 5: Alpha (α) (the proper name is Rhombus since 19 September 2024[10]) and Beta (β) reticuli. The reddish star R Reticuli is a Mira variable. This variable was discovered by C. Ragoonatha Chary at the Madras Observatory in India.[11]
The binary star system Epsilon Reticuli consists of a spectral class K2IV star being orbited by a white dwarf. Based on parallax measurements, this system is located about 50 light years from the Sun. In 2000, a planetary companion was announced, orbiting the star ε Reticuli A.[12]
Zeta Reticuli is a wide binary star system, with both members being similar to the Sun. It is located at a distance of about 39 light years. This system gained some notoriety in ufology when the alleged alien abductees Betty and Barney Hill named it as the home of their abductors.
In 2005, a type Ia supernova was discovered in the spiral galaxy NGC 1559, located in the constellation.[13]
The dwarf galaxy Reticulum II is enriched in r-process heavy elements.[14]
The Horologium-Reticulum Supercluster is a galaxy supercluster that ranges from 700 million to 1.2 billion light-years from Earth.
See also
References
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- ^ Page Module:Citation/CS1/styles.css has no content.Kirkpatrick, J. Davy; Marocco, Federico; et al. (April 2024). "The Initial Mass Function Based on the Full-sky 20 pc Census of ~3600 Stars and Brown Dwarfs". The Astrophysical Journal Supplement Series. 271 (2): 55. arXiv:2312.03639. Bibcode:2024ApJS..271...55K. doi:10.3847/1538-4365/ad24e2.
- ^ Page Module:Citation/CS1/styles.css has no content.Ridpath, Ian (1989). Star Tales. James Clarke & Co. pp. 10–11. ISBN 0-7188-2695-7.
- ^ Page Module:Citation/CS1/styles.css has no content.Farinacci, Jeff A. (2008). Guide to Observing Deep Sky Objects. Springer. pp. 150–151. ISBN 978-1-387-72850-3.
- ^ AtlasCoelestis.com: "Jacob Bartsch ― Usus Astronomicus Planisphaerii Stellati Argentoratum (Strasburgo) 1624"
- ^ Ian Ridpath's Star Tales – Reticulum
- ^ Page Module:Citation/CS1/styles.css has no content.Kanas, Nick (2007). Star maps: history, artistry, and cartography. New York, New York: Springer. p. 130. ISBN 978-0-387-71668-8.
- ^ Kanas (2007:308–309).
- ^ Page Module:Citation/CS1/styles.css has no content.Bradt, Hale (2004). Astronomy methods: a physical approach to astronomical observations. Cambridge University Press. p. 53. ISBN 0-521-53551-4.
- ^ Page Module:Citation/CS1/styles.css has no content.Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, VA: The McDonald & Woodward Publishing Company. pp. 305–07. ISBN 978-0-939923-78-6.
- ^ IAU-Catalog of Star Names
- ^ Page Module:Citation/CS1/styles.css has no content.Kameswara Rao, N.; Vagiswari, A.; Thakur, Priya; Birdie, Christina (2009). "C.Ragoonatha Chary and his Variable Stars". arXiv:0908.3081v1 [astro-ph.SR].
- ^ Page Module:Citation/CS1/styles.css has no content.Chauvin, G.; Lagrange, A.-M.; Udry, S.; Mayor, M. (November 2007). "Characterization of the long-period companions of the exoplanet host stars: HD 196885, HD 1237 and HD 27442. VLT/NACO and SINFONI near-infrared, follow-up imaging and spectroscopy". Astronomy and Astrophysics. 475 (2): 723–727. arXiv:0710.5918. Bibcode:2007A&A...475..723C. doi:10.1051/0004-6361:20067046. S2CID 16950822.
- ^ Page Module:Citation/CS1/styles.css has no content.ESO Public Affairs Department. "Celestial Blast in Bleak Reticulum". European Organisation for Astronomical Research in the Southern Hemisphere (ESO). Retrieved 2009-09-05.
{{cite news}}: CS1 maint: deprecated archival service (link) - ^ Page Module:Citation/CS1/styles.css has no content.Ji, Alexander P.; Frebel, Anna; Chiti, Anirudh; Simon, Joshua D. (21 March 2016). "R-process enrichment from a single event in an ancient dwarf galaxy". Nature. 531 (7596): 610–613. arXiv:1512.01558. Bibcode:2016Natur.531..610J. doi:10.1038/nature17425. PMID 27001693. S2CID 205248401.
Works cited
- Page Module:Citation/CS1/styles.css has no content."Reticulum". The Constellations. International Astronomical Union. Archived from the original on 2013-06-04. Retrieved 2023-02-26.
External links
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- The Deep Photographic Guide to the Constellations: Reticulum
- Starry Night Photography: Reticulum Constellation
- Star Tales – Reticulum
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