Canis Major

おおいぬ座

Genitive: Canis Majoris

Equatorial 380 sq° CMa

最輝星： Sirius

星図で開くカタログを見る

神話

オリオンの猟犬の一つ、おおいぬ座。シリウス（犬の星）は全天で最も明るい星で、古代エジプトではその出現がナイル川の氾濫を告げるものとして重要であった。

観測の見どころ

シリウスは等級-1.46で冬の夜空を支配する。散開星団M41やNGC 2362（おおいぬ座タウ星団）、輝線星雲NGC 2359（トールのヘルメット星雲）を含む。

主な恒星

20

Sirius

HIP 32349; Alpha CMa; 9 CMa

-1.46 mag 11.1″ B: 8.4 A0mA1Va

Adara

HIP 33579; Epsilon CMa; 21 CMa

1.50 mag 7.9″ B: 7.5 B1III

Wezen

HIP 34444; Delta CMa; 25 CMa

1.84 mag 265.9″ B: 8.8 F8Ia

Murzim

HIP 30324; Beta CMa; 2 CMa

1.98 mag 186.1″ B: 10.5 B1III

Aludra

HIP 35904; Eta CMa; 31 CMa

2.45 mag 177.0″ B: 6.8 B5Ia

Furud

HIP 30122; Zeta CMa; 1 CMa

3.02 mag 169.6″ B: 7.8 B2.5 V

24 CMa

HIP 33977; 24 CMa

3.02 mag B4Ia

HIP 33856; Sigma CMa; 22 CMa

3.47 mag K4III

Omega CMa

HIP 35037; Omega CMa; 28 CMa

3.85 mag B2.5Ve

16 CMa

HIP 33152; 16 CMa

3.87 mag K2Iab

Nu CMa

HIP 31592; Nu CMa; 7 CMa

3.95 mag K1III

Kappa CMa

HIP 32759; Kappa CMa; 13 CMa

3.96 mag B1.5Ve

Theta CMa

HIP 33160; Theta CMa; 14 CMa

4.07 mag K4III

Muliphein

HIP 34045; Gamma CMa; 23 CMa

4.12 mag B8II

Xi CMa

HIP 31125; Xi CMa; 4 CMa

4.33 mag B0.5IV

Iota CMa

HIP 33347; Iota CMa; 20 CMa

4.37 mag B3II

Tau CMa

HIP 35415; Tau CMa; 30 CMa

4.40 mag 8.3″ B: 10.2 O9Ib

Nu CMa

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

Xi CMa

HIP 31416; Xi CMa; 5 CMa

4.54 mag A0V

二重星

15

HIP 35210

4.79 mag 26.5″ B: 5.8 K3Ib-II

Nu CMa

HIP 31564; Nu CMa; 6 CMa

5.70 mag 17.4″ B: 7.4 G8III+F3IV-V

Mu CMa

HIP 33345; Mu CMa; 18 CMa

5.00 mag 2.8″ B: 7.1 G5III+A2

Pi CMa

HIP 33302; Pi CMa; 19 CMa

4.68 mag 11.6″ B: 9.6 gF2

Sirius

HIP 32349; Alpha CMa; 9 CMa

-1.46 mag 11.1″ B: 8.4 A0mA1Va

17 CMa

HIP 33248; 17 CMa

5.74 mag 42.5″ B: 8.7 A3IV

HIP 34940

6.36 mag 19.3″ B: 9.1 B2IV+G5IV

HIP 32810

5.70 mag 42.7″ B: 7.7 B6Vnpe

Adara

HIP 33579; Epsilon CMa; 21 CMa

1.50 mag 7.9″ B: 7.5 B1III

HIP 31593

6.35 mag 9.0″ B: 9.3 B5V

HIP 34489

6.65 mag 15.1″ B: 11.1 B2V

HIP 31190

5.69 mag 24.7″ B: 7.9 B2IVe

HP CMa

HIP 32385

5.80 mag 5.0″ B: 8.2 B2III

HIP 30468

6.12 mag 23.1″ B: 10.5 B5Ve

HIP 32144

6.13 mag 18.0″ B: 8.3 F0

変光星

2

R CMa

HIP 35487

5.70 mag 5.7 - 6.3 EA/SD F1V

29 CMa

HIP 35412; 29 CMa

4.98 mag 4.84 - 5.33 EB/KE O7Ia:fp

深宇宙天体

30

散開星団 (12)

NGC 2287

4.5 mag 38.

NGC 2362

4.1 mag 8

NGC 2360

7.2 mag 13

NGC 2354

6.5 mag 20.

NGC 2345

7.7 mag 12.

NGC 2374

8.0 mag 19.

NGC 2204

8.6 mag 13.

NGC 2383

8.4 mag 6.

NGC 2243

9.4 mag 5.

NGC 2367

7.9 mag 4.

NGC 2384

7.4 mag 3.

NGC 2318

— mag

銀河 (16)

NGC 2207

10.7 mag 4.3 SABc

NGC 2280

12.0 mag 5.6 Sc

NGC 2223

11.4 mag 3.3 Sbc

NGC 2217

10.4 mag 4.8 S0-a

NGC 2206

13.0 mag 2.3 Sbc

NGC 2227

14.0 mag 2.3 Sc

IC 2163

— mag Sc

NGC 2272

11.9 mag 2.1 E-S0

NGC 2325

11.2 mag 2.3 E

IC 2171

— mag 1.8 IB

NGC 2216

14.0 mag SABa

NGC 2263

13.0 mag SBab

NGC 2283

13.0 mag Sc

NGC 2295

14.0 mag Sab

IC 456

— mag 2.3

NGC 2211

14.0 mag S0

輝線星雲 (1)

NGC 2359

— mag 8.

散光星雲 (1)

IC 468

— mag 20.