Daljnogled (ozvezdje)
Daljnogled, tudi Teleskop je malo ozvezdje na južni nebesni polobli, eno izmed dvanajstih ozvezdij, ki jih je v 18. stoletju poimenoval francoski astronom Nicolas-Louis de Lacaille in eno izmed več znanstvenih instrumentov. Daljnogled je bil kasneje po površini zelo zmanjšan, kar sta storila Francis Baily in Benjamin Gould.
Ozvezdje | |
Latinsko ime | Telescopium |
---|---|
Kratica | Tel |
Rodilnik latinskega imena | Telescopii |
Simbolika | daljnogled/teleskop |
Rektascenzija | 19h {{{2}}}m |
Deklinacija | −50° |
Družina | La Caille |
Kvadrant | SQ4 |
Površina | 252 (°)² (57. po velikosti) |
Glavne zvezde | 2 |
Bayer/Flamsteed zvezde | 13 |
Zvezde s planeti | 0 |
Zvezde svetlejše kot 3,00m | 0 |
Zvezde znotraj 10,00 pc (32,62 ly) | 2 |
Najsvetlejša zvezda | α Tel (m) |
Najbližja zvezda | Gliese 754
starmagnitude=3,49 (19,35 sv.l., 5,93 pc) |
Messierova telesa | 0 |
Sosednja ozvezdja | |
Vidno na širinah med +40° in −90°. Najprimernejše opazovanje ob 21:00 - avgust. |
Najsvetlejša zvezda v ozvezdju je Alfa Daljnogleda, modrobela podorjakinja z navidezno magnitudo 3,5, ki ji sledi oranžna orjakinja Zeta Daljnogleda z magnitudo 4,1. Eta in PZ Daljnogleda sta dva mlada zvezdna sistema z zvezdnimi diski in spremljevalko rjavo pritlikavko. Daljnogled vsebuje dve nenavadni zvezdi z zelo malo vodika, ki sta morda produkt trčenja dveh belih pritlikavk: PV Daljnogleda, znana tudi kot HD 168476, je vroča modra ekstremna helijeva zvezda, medtem ko je RS Daljnogleda spremenljivka tipa R Severne krone. RR Daljnogleda je kataklizmična spremenljivka, ki je leta 1948 z 6. magnitudo zasvetela kot nova.
Karakteristike uredi
Majhno ozvezdje Daljnogled meji na severu na Strelca in Južno krono, na zahodu na Oltar, na jugu na Pava, na vzhodu na Indijanca, ima pa tudi skupen kot z Mikroskopom na severovzhodu. Tričrkovno poimenovanje, ki ga je uvedla Mednarodna astronomska zveza leta 1922, je "Tel".[1] Uradne meje ozvezdja, ki jih je postavil Eugène Delporte leta 1930, so definirane štirikotno. V ekvatorskem nebesnem sistemu so meje med rektascenzijama 18h 09,1m in 20h 29,5m, drugi dve meji pa sta med deklinacijama −45,09° in −56,98°.[2] Celotno ozvezdje je vidno opazovalcev, ki so južneje od širine 33°N.[3][a]
Glej tudi uredi
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Sklici uredi
Citati
Viri
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: Vzdrževanje CS1: ref podvaja privzeto (povezava) Vzdrževanje CS1: samodejni prevod datuma (povezava) - 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, Virginia: The McDonald & Woodward Publishing Company. ISBN 978-0-939923-78-6.
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On-line viri
- »AAVSO Light Curve Generator«. AAVSO. Arhivirano iz prvotnega spletišča dne 11. septembra 2013. Pridobljeno 5. septembra 2013.
- Otero, Sebastian A. (31. julij 2006). »BL Telescopii«. AAVSO Website. American Association of Variable Star Observers. Pridobljeno 14. julija 2014.
- Otero, Sebastian A. (13. februar 2014). »RS Telescopii«. AAVSO Website. American Association of Variable Star Observers. Pridobljeno 3. julija 2014.
- Otero, Sebastian A. (11. november 2011). »RX Telescopii«. AAVSO Website. American Association of Variable Star Observers. Pridobljeno 26. junija 2014.
- Watson, Christopher (3. maj 2013). »NSV 12783«. AAVSO Website. American Association of Variable Star Observers. Pridobljeno 2. julija 2014.
- Bortle, John E. (Februar 2001). »The Bortle Dark-Sky Scale«. Sky & Telescope. Sky Publishing Corporation. Pridobljeno 29. novembra 2014.
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- »Epsilon Telescopii – Star in Double System«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 30. septembra 2012.
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- »HD 169405«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 26. junija 2014.
- »HD 181327«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 2. julija 2014.
- »HR 6934«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 29. septembra 2012.
- »HR 6938«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 29. septembra 2012.
- »Iota Telescopii«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 26. junija 2014.
- »Kappa Telescopii«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 30. septembra 2012.
- »LHS 60 - High Proper Motion Star«. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pridobljeno 11. novembra 2014.
- Rivinius, Th.; Baade, D.; Hadrava, P.; Heida, M.; Klement, R. (Maj 2020). »A naked-eye triple system with a nonaccreting black hole in the inner binary«. Astronomy & Astrophysics. 637 (L3): 11. doi:10.1051/0004-6361/202038020.