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Constellation : Dra=Le Dragon Nom Distance (Al) Magnitude Type Spectr

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Le Dragon 1 Constellation : Dra=le Dragon Nom distance (al) magnitude type spectr. remarques ααα ou Thuban 200 3,6 M0III βββ ou Alwaïd ou Rastaban 400 2,79 G2Ib γγγ ou Etamin ou Eltanin 150 2,24 K5III δδδ ou Nodus II ou Al Taïs 99 3,07 G9III ννν ou Kuma 100 4,9 et... A6V et.. binaire A: blanche 4,9 A5 B à à 62" ξξξ ou Grumium 200 3,8 K2III ζζζ ou Nodus I ou Adhibah 300 3,17 B6III εεε ou Tyl 146 3,8 et K0III et Etoile double, A : jaune-orange 7 K0 B à 3,4" ιιι ou Edasish ou Ed Asic 100 3.42 et K2IIIet étoile binaire : A : orange 8.87 K7 B à 4'14" A possède 1 planète extrasolaire b : m=8,6MJup. p=550j. d=1,34ua) λλλ ou Gianfar ou Giauzar 125 4,1 M0III ΦΦΦ 270 4,2 A0 Le Dragon 2 σσσ ou ΑΑΑl safi 18 4,7 K0V µµµ ou Arrabis 88 5.66 et F7Vet Binaire A jaune 5.69 F5 B à 2,3" de période 482 ans ψψψ1ψ1 ou Dsiban 72 4,6 et F5IV et binaire A : blanche 5,6 F8 B à 30" ψψψ2ψ222 720 5,4 F2II ηηη 88 2,73 G8III étoile triple (difficile à voir) θθθ 64 4,1 F8IV κκκ 400 3,9 B6III οοο 320 4,6 et G9III Etoile double A : orange 8,2 B : rouge-orange. à 37" Etoile triple liée. 17 et 398 5.38 et B9V 17 A bleue 6.42 A2 B à 3.2" 16 5.50 B9V 16 à 1'29" de 17 39 189 5 et A4 et Etoile triple, A : blanche 7,9 et F8 et B : à 1'30"de A 7,5 A2 C à 3,7" de A Etoile triple 41 et 173 5,74 K2V 41 A : jaune et variable 5,7 F5 B A 18" 40 166 F7 .40 à 3'44" de 41 La Petite Reine un objet STAR d'Harrington , (Little Queen), astérisme ayant la forme d'un W, comme la Grande Reine : Cassiopée. TrES-2 11,4 Possède 1 planète extrasolaire b: m=1,28 Mup. p=2,5 j.d=0,036ua météorites : les Draconides ou Giacobinides dont le radiant est l'étoile Grumium vers le 9 octobre, poussières de la comète Giacobini-Zinner Il y a aussi les les Eta Draconides (22 mars-8avril)et les Tau Draconides (13mars-17avril Le Dragon 3 Nom distance (al) magnitude remarques NGC3147 85 millions 11,5 galaxie Sbc (5'X4') NGC4125 65millions 10,7 galaxie E6 (5'X3') NGC4291 11,5 galaxie E (d= 2.0'x 1,7') NGC4319 70 millions 13 galaxie spirale. Elle semble être reliée par un pont de matière avec Markarian 205, un quasar à 900 millions al ! NGC4589 90 millions 11,8 galaxie E2 (3'X3') NGC4750 75 millions 11.9 galaxie Sa (2'x2') NGC 5879 40 millions 11,6 galaxie spirale (d= 3,9'x 1,4' ) NGC5866 (ou parfois 40millions 11,1 galaxie S0 (5'X2') M102) galaxie du Fuseau NGC5907 (la galaxie de 40 millions 10,3 Galaxie Sb (12'X3') l'écharde) diamètre réel: 150 000al vitesse radiale: 725km/s petit noyau caché par une épaisse couche de poussière. NGC5982 130millions 11,10 galaxie E3 (d= 3,0'x 2,1' ) NGC5985 90 millions 11,8 galaxie SB/ Sc (6'X3') NGC6340 100 millions 11.9 galaxie S0/Sa (4'X3,6') NGC6503 12 millions 10,9 galaxie Sc (11'X4') NGC6543 3200 9,5 nébuleuse planétaire, Oeil de Chat ou nébuleuse du pôle de l'écliptique (C.Flammarion): d = 22"X16",diam. 20 000ua étoile centrale: Ts=35000K. Elle possède un anneau extérieur très faible de d=4'. Le Dragon 4 A partir de λλλ Dragon. Au 26mm (77X) on la reconnaît accompagnée de l'étoile 2 Dragon. NGC3147 : chemin assez facile mais la galaxie est seulement visible en vision décalée. La carte montre 3 galaxies alignées NGC4291, NGC4589 et NGC4750 NGC4291 Dans l"alignement de 2 étoiles brillantes au chercheur. Au 26mm on aperçoit un petit triangle rectangle. Mettre l'étoiles brillante hors du champ. La galaxie est le 4ème sommet du rectangle formé avec le triangle précédent. On voit mieux en vision décalée NGC4589 est une petite tache floue près d'une étoile au 26mm. Il faut là-encore, la vision décalée mais dans ce cas elle saute aux yeux NGC4750 , visible elle-aussi en vision décalée, elle apparaît comme une petite boule dans un champ vide d'étoiles brillantes au 26mm. NGC4125 Rechercher κ(kappa) Dragon. Au chercheur, κ est entouré de 4 et 6 Dragon alignées avec elle. Une 4ème étoile brillante est situé presque dans l'alignement. NGC4125 n'est pas très facile à trouver (étoiles guides faibles ) mais visible en vision directe. Pour la trouver, repérer un trapèze. Le Dragon 5 A partir de iota ( ιιι) Dragon ιιι Dragon = Edasich Belle couleur dorée mais les 2 composantes sont trop écartées. Peu spectaculaire NGC 5879. Au chercheur, aller vers 3étoiles formant un angle de 120° . La galaxie est à droite de celle de droite. Pas facile à voir , il faut sortir l"étoile brillante du champ et rechercher en vision décalée dans la zone proche de cette étoile brillante. NGC5907, la galaxie de l'écharde. Elle est visible, bien que faible, au 26mm. Elle est très allongée et sa longueur prend le quart du champ de cet oculaire NGC5866 (M102 ?) La galaxie du Fuseau. C'est une galaxie vue presque par la tranche. Elle est assez brillante et on comprend que certains auteurs aient pensé que c'était M102. Bien vue, proche d'une étoile. NGC 5982 et NGC5985 , 2 galaxies proches. NGC 5982 . Son éclat est plus concentré que NGC5985. La vision décalée permet de mieux la voir. NGC 5985 est plus large et étalée , il faut bien insister pour l'apercevoir au bout de trois étoiles formant un triangle pointu qui semble la pointer. A partir d' εεε (epsilon) Dragon On la trouve à l'oeil nu Epsilon Dragon belle étoile double. Au 9mm (22X) une petite étoile apparaît toute proche d'epsilon qui est une belle orange. Le Dragon 6 A partir de ψψψ (psi) 1et 2 Dragon Psi 1 Beau couple doré au 26mm 40-41 Dragon une étoile triple dont les 2 plus brillantes forment un beau couple doré. La Petite Reine ( Little Queen) . Bien vue au chercheur. Il faut l'apprécier au 26mm (77X) NGC6340 . Presque visible directement, proche d'une étoile. On la voit bien en vision décalée dans un champ (au 26mm - 77X) qui contient beaucoup d"étoiles. NGC6503 apparaît allongée près d'une étoile assez brillante. Bien vue NGC6543 est le clou du spectacle dans cette constellation. Au chercheur, on croit voir 3 étoiles alignées. L'astre du milieu n'est pas une étoile, c'est NGC6543, l'œil de Chat. Au 26 mm, on y voit une petite boule très brillante proche d'une étoile. La nébuleuse planétaire reste très brillante au 9mm mais tout de même assez petite. Belle boule au filtre OIII Le Dragon 7 A partir de la Tête du Dragon ( βββ, γγγ, ννν et ξξξ ) ννν ou Kuma. Joli couple de même éclat, visible au chercheur et beau au 26mm (77X) Mu (Alrakis) Bien séparée au 9mm(222X) : 2 étoiles de même éclat 16-17 Bien vue , joli couple. Au chercheur, on sépare 16 et 17. Au 26mm (77X) on voit 2 étoiles de même éclat puis au 9mm (22X) on sépare les 2 composantes de 17. On voit même les couleurs. 39 Dragon une étoile triple, encore .Au 26mm (77X) on voit 2 étoiles mais au 9mm (22X) la plus brillante se dédouble. Elle est accompagné d'un petit compagnon. Joli. Omicron Dragon une belle étoile double. Au 26mm(77X) la plus brillante a un bel éclat doré; .
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