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Canis Major

Grand Chien

Genitive: Canis Majoris

Equatorial 380 sq° CMa

Étoile la plus brillante : Sirius

Mythologie

Le Grand Chien, l'un des chiens de chasse d'Orion. Sirius, l'étoile du Chien, est l'étoile la plus brillante de tout le ciel et était importante pour les anciens Égyptiens car son lever héliaque annonçait la crue du Nil.

Points Forts de l'Observation

Sirius, de magnitude -1,46, domine le ciel d'hiver. Contient les amas ouverts M41 et NGC 2362 (amas de Tau Canis Majoris), ainsi que la nébuleuse en émission NGC 2359 (casque de Thor).

Étoiles Principales

20

HIP 32349; Alpha CMa; 9 CMa

-1.46 mag 11.1″ B: 8.4 A0mA1Va

HIP 33579; Epsilon CMa; 21 CMa

1.50 mag 7.9″ B: 7.5 B1III

HIP 34444; Delta CMa; 25 CMa

1.84 mag 265.9″ B: 8.8 F8Ia

HIP 30324; Beta CMa; 2 CMa

1.98 mag 186.1″ B: 10.5 B1III

HIP 35904; Eta CMa; 31 CMa

2.45 mag 177.0″ B: 6.8 B5Ia

HIP 30122; Zeta CMa; 1 CMa

3.02 mag 169.6″ B: 7.8 B2.5 V

HIP 33977; 24 CMa

3.02 mag B4Ia

HIP 33856; Sigma CMa; 22 CMa

3.47 mag K4III

HIP 35037; Omega CMa; 28 CMa

3.85 mag B2.5Ve

HIP 33152; 16 CMa

3.87 mag K2Iab

HIP 31592; Nu CMa; 7 CMa

3.95 mag K1III

HIP 32759; Kappa CMa; 13 CMa

3.96 mag B1.5Ve

HIP 33160; Theta CMa; 14 CMa

4.07 mag K4III

HIP 34045; Gamma CMa; 23 CMa

4.12 mag B8II

HIP 31125; Xi CMa; 4 CMa

4.33 mag B0.5IV

HIP 33347; Iota CMa; 20 CMa

4.37 mag B3II

HIP 35415; Tau CMa; 30 CMa

4.40 mag 8.3″ B: 10.2 O9Ib

HIP 31700; Nu CMa; 8 CMa

4.43 mag 1.2″ B: 8.2 K1-II-III

HIP 30788; Lambda CMa

4.48 mag B4V

HIP 31416; Xi CMa; 5 CMa

4.54 mag A0V

Étoiles Doubles

15
4.79 mag 26.5″ B: 5.8 K3Ib-II

HIP 31564; Nu CMa; 6 CMa

5.70 mag 17.4″ B: 7.4 G8III+F3IV-V

HIP 33345; Mu CMa; 18 CMa

5.00 mag 2.8″ B: 7.1 G5III+A2

HIP 33302; Pi CMa; 19 CMa

4.68 mag 11.6″ B: 9.6 gF2

HIP 32349; Alpha CMa; 9 CMa

-1.46 mag 11.1″ B: 8.4 A0mA1Va

HIP 33248; 17 CMa

5.74 mag 42.5″ B: 8.7 A3IV
6.36 mag 19.3″ B: 9.1 B2IV+G5IV
5.70 mag 42.7″ B: 7.7 B6Vnpe

HIP 33579; Epsilon CMa; 21 CMa

1.50 mag 7.9″ B: 7.5 B1III
6.35 mag 9.0″ B: 9.3 B5V
6.65 mag 15.1″ B: 11.1 B2V
5.69 mag 24.7″ B: 7.9 B2IVe

HIP 32385

5.80 mag 5.0″ B: 8.2 B2III
6.12 mag 23.1″ B: 10.5 B5Ve
6.13 mag 18.0″ B: 8.3 F0

Étoiles Variables

2

HIP 35487

5.70 mag 5.7 - 6.3 EA/SD F1V

HIP 35412; 29 CMa

4.98 mag 4.84 - 5.33 EB/KE O7Ia:fp

Objets du Ciel Profond

30
Amas Ouvert (12)
4.5 mag 38.
4.1 mag 8
7.2 mag 13
6.5 mag 20.
7.7 mag 12.
8.0 mag 19.
8.6 mag 13.
8.4 mag 6.
9.4 mag 5.
7.9 mag 4.
7.4 mag 3.
Galaxie (16)
10.7 mag 4.3 SABc
12.0 mag 5.6 Sc
11.4 mag 3.3 Sbc
10.4 mag 4.8 S0-a
13.0 mag 2.3 Sbc
14.0 mag 2.3 Sc
— mag Sc
11.9 mag 2.1 E-S0
11.2 mag 2.3 E
— mag 1.8 IB
14.0 mag SABa
13.0 mag SBab
13.0 mag Sc
14.0 mag Sab
— mag 2.3
14.0 mag S0
Nébuleuse en Émission (1)
— mag 8.
Nébuleuse Diffuse (1)
— mag 20.