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Octans

Octant

Genitive: Octantis

Southern 291 sq° Oct

Étoile la plus brillante : Nu Octantis

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Mythologie

Création de Lacaille représentant l'octant, un instrument de navigation. Contient le pôle céleste sud.

Points Forts de l'Observation

La constellation du pôle sud. Sigma Octantis est l'étoile visible à l'œil nu la plus proche du pôle céleste sud mais est très faible (mag 5,4), contrairement à Polaris dans le nord.

Étoiles Principales

20
Nu Oct

HIP 107089; Nu Oct

3.76 mag K1III
Beta Oct

HIP 112405; Beta Oct

4.15 mag A9IV-V
Delta Oct

HIP 70638; Delta Oct

4.32 mag K2III
Theta Oct

HIP 122; Theta Oct

4.78 mag K3III
Epsilon Oct

HIP 110256; Epsilon Oct

5.10 mag 4.58 - 5.30 SRB M5III
Gamma Oct

HIP 117689; Gamma1 Oct

5.11 mag G7III
Alpha Oct

HIP 104043; Alpha Oct

5.15 mag A7III+G2III
Gamma Oct

HIP 814; Gamma3 Oct

5.28 mag G8III
Chi Oct

HIP 92824; Chi Oct

5.28 mag K3III
Lambda Oct

HIP 107843; Lambda Oct

5.29 mag 3.3″ B: 7.3 G8-K0III
Xi Oct

HIP 112781; Xi Oct

5.35 mag B6IV
Zeta Oct

HIP 43908; Zeta Oct

5.42 mag A8-9IV
Iota Oct

HIP 63031; Iota Oct

5.46 mag 0.7″ B: 6.9 K0III
Phi Oct

HIP 90133; Phi Oct

5.47 mag A0V
Polaris Australis

HIP 104382; Sigma Oct

5.47 mag F0III
Tau Oct

HIP 115836; Tau Oct

5.49 mag K2III
Psi Oct

HIP 110078; Psi Oct

5.51 mag F3III
Rho Oct

HIP 76996; Rho Oct

5.57 mag 65.8″ B: 11.6 A2V
Kappa Oct

HIP 66753; Kappa Oct

5.58 mag Am
Pi Oct

HIP 73540; Pi Oct

5.65 mag G8-K0III

Étoiles Doubles

12
HIP 110712
6.04 mag 21.3″ B: 8.8 G3V
Mu Oct

HIP 102125; Mu Oct

6.55 mag 16.7″ B: 7.1 G5III
Lambda Oct

HIP 107843; Lambda Oct

5.29 mag 3.3″ B: 7.3 G8-K0III
HIP 58697
6.05 mag 25.0″ B: 9.0 K3III
HIP 108849
5.95 mag 34.8″ B: 10.6 F3III
HIP 106424
6.47 mag 23.8″ B: 10.4 A0V
HIP 101427
5.77 mag 25.5″ B: 10.8 G6-8II
Rho Oct

HIP 76996; Rho Oct

5.57 mag 65.8″ B: 11.6 A2V
HIP 17328
6.41 mag 1.9″ B: 8.1 B9.5IV
Iota Oct

HIP 63031; Iota Oct

5.46 mag 0.7″ B: 6.9 K0III
Psi Oct

HIP 110078; Psi Oct

5.51 mag F3III
HIP 112725
6.73 mag A4V

Étoiles Variables

1
Epsilon Oct

HIP 110256; Epsilon Oct

5.10 mag 4.58 - 5.30 SRB M5III

Objets du Ciel Profond

14
Galaxie (12)
NGC 7098
— mag 4.4 Sa
Polarissima Australis

NGC 2573

13.5 mag 3.6 Sc
NGC 7637
— mag 2.5 Sc
IC 4864
— mag 1.6 SABa
IC 4912
— mag 1.0 SBc
IC 5022
— mag 1.2 SABc
IC 5025
— mag 1.3 Sbc
IC 5026
— mag 2.5 Scd
NGC 6920
— mag 1.8 S0
NGC 6438
13.0 mag 2.6 S0
IC 4333
— mag 1.7 S0-a
NGC 6557
— mag S0
Inconnu (2)
IC 4928
— mag
IC 5040
— mag Sd