Žirafa (sazvežđe)
(preusmereno sa Сазвјежђе Жирафа)
| Sazvežđe | |
 | |
| Latinsko ime | Camelopardalis |
|---|---|
| Skraćenica | Cam[1] |
| Genitiv | Camelopardalis[1] |
| Simbolizuje | žirafu[1] |
| Rektascenzija | 6 |
| Deklinacija | +70[2] |
| Površina | 757 sq. deg. (18) |
| Najsjajnija zvezda | Beta Žirafe (4,03m) |
| Meteorski rojevi | nema |
| Susedna sazvežđa | |
| Vidljivo u rasponu +90° i −10°. U najboljem položaju za posmatranje u 21:00 čas u februaru. | |
Žirafa (lat. Camelopardalis) je sazvežđe severne hemisfere koje su početkom 17. veka definisali holandski astronom Petar Plancije i nemački astronom Jakob Barč,[3][1] kako bi pokrili deo neba između Velikog medveda i Kasiopeje koji su stari Grci ostavili prazan jer u njemu nema nijedne zvezde sjajnije od 4. magnitude. Latinski naziv sazvežđa se ponekad zapisuje i kao Camelopardalus ili Camelopardus.
Zvezde
[uredi | uredi izvor]Uprkos svojoj veličini (18. najveće sazveđže po površini), u Žirafi nema sjajnih zvezda — najsjajnija je beta Žirafe magnitude 4,03. U pitanju je dvojna zvezda čija je glavna komponenta žuti superdžin G klase, a nalazi se na oko 1000 svetlosnih godina od Sunčevog sistema. Druga po sjajnosti je CS Žirafe magnitude 4,21. U pitanju je takođe dvojna zvezda, primarna komponenta je plavobeli superdžin B klase. Alfa Žirafe je sa magnitudom 4,3 treća po sjajnosti, radi se o superdžinu O klase koji ubrzano gubi masu.
Objekti dubokog neba
[uredi | uredi izvor]NGC 2403 je spiralna galaksija magnitude 8,4 koju je u 18. veku otkrio Vilhelm Heršel. NGC 1502 je Otvoreno jato 6. magnitude u čijem se centru nalaze dve binarne zvezde. IC 342 je spiralna galaksija koja leži u blizini galaktičkog ekvatora, što otežava njeno posmatranje. U Žirafi se nalaze još i planetarna maglina NGC 1501 i mala galaksija NGC 2655.
Reference
[uredi | uredi izvor]- ^ a b v g Ridpath 2001, str. 92–93.
- ^ „Camelopardalis, constellation boundary”. The Constellations. International Astronomical Union. Pristupljeno 14. 2. 2014.
- ^ Knowledge Encyclopedia Space!. Dorling Kindersley Ltd. 2015. str. 164. ISBN 9780241245347.
Literatura
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- „SU Leonis Minoris – Variable Star of RS CVn type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 20. 10. 2012.
- „SV Leonis Minoris – Variable Star of RS CVn type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 20. 10. 2012.
- „21 Leonis Minoris – Variable Star of delta Sct type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 15. 10. 2012.
- „37 Leonis Minoris”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 5. 11. 2012.
- „46 Leonis Minoris – Variable Star”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 2. 11. 2012.
- „GJ 356 B – Star in double system”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 20. 10. 2012.
- „HD 82886”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 19. 10. 2012.
- „LHS 2216 – High Proper Motion Star”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 21. 10. 2012.
- „R Leonis Minoris – Variable Star of Mira Ceti type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 22. 10. 2012.
- „RY Leonis Minoris – Pulsating White Dwarf”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 22. 10. 2012.
- „S Leonis Minoris – Variable Star of Mira Ceti type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 22. 10. 2012.
- „U Leonis Minoris – Semi-regular pulsating Star”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 22. 10. 2012.
- „Interacting Galaxy Pair Arp 107”. Spitzer Space Telescope website. Spitzer Science Center, California Institute of Technology. 9. 6. 2005. Pristupljeno 19. 10. 2012.
Spoljašnje veze
[uredi | uredi izvor]
Vikimedijina Ostava ima datoteke za članak:
- The Deep Photographic Guide to the Constellations: Camelopardalis
- Star Tales – Camelopardalis
- NASA – Voyager Interstellar Mission Characteristics
- Sazvežđe Žirafa Arhivirano na sajtu Wayback Machine (24. februar 2012) na TopAstronomer.com (jezik: engleski)
| Državne | |
|---|---|
| Ostale | |
