Mythology
A Lacaille creation representing the reflecting octant, a navigational instrument. Contains the south celestial pole.
Observing Highlights
The south pole constellation. Sigma Octantis is the nearest naked-eye star to the south celestial pole but is very faint (mag 5.4), unlike Polaris in the north.
Main Stars
20
Main Stars
20HIP 107089; Nu Oct
3.76 mag
0.1″
K1III
HIP 112405; Beta Oct
4.15 mag
A9IV-V
HIP 70638; Delta Oct
4.32 mag
K2III
HIP 122; Theta Oct
4.78 mag
K3III
HIP 110256; Epsilon Oct
5.10 mag
M5III
5.11 mag
G7III
HIP 104043; Alpha Oct
5.15 mag
A7III+G2III
5.28 mag
G8III
HIP 92824; Chi Oct
5.28 mag
K3III
HIP 107843; Lambda Oct
5.29 mag
3.3″
B: 7.3
G8-K0III
HIP 112781; Xi Oct
5.35 mag
B6IV
HIP 43908; Zeta Oct
5.42 mag
A8-9IV
HIP 63031; Iota Oct
5.46 mag
0.7″
B: 6.9
K0III
HIP 90133; Phi Oct
5.47 mag
A0V
5.47 mag
F0III
HIP 115836; Tau Oct
5.49 mag
K2III
HIP 110078; Psi Oct
5.51 mag
7.4″
B: 14.5
F3III
HIP 76996; Rho Oct
5.57 mag
65.8″
B: 11.6
A2V
HIP 66753; Kappa Oct
5.58 mag
Am
5.65 mag
G8-K0III
Double Stars
12
Double Stars
12
6.04 mag
21.3″
B: 8.8
G3V
6.55 mag
16.7″
B: 7.1
G5III
HIP 107843; Lambda Oct
5.29 mag
3.3″
B: 7.3
G8-K0III
6.05 mag
25.0″
B: 9.0
K3III
5.95 mag
34.8″
B: 10.6
F3III
6.47 mag
23.8″
B: 10.4
A0V
5.77 mag
25.5″
B: 10.8
G6-8II
HIP 76996; Rho Oct
5.57 mag
65.8″
B: 11.6
A2V
HIP 110078; Psi Oct
5.51 mag
7.4″
B: 14.5
F3III
6.73 mag
5.4″
B: 12.9
A4V
6.41 mag
1.9″
B: 8.1
B9.5IV
HIP 63031; Iota Oct
5.46 mag
0.7″
B: 6.9
K0III
Variable Stars
1
Variable Stars
1HIP 110256; Epsilon Oct
5.10 mag
M5III
Deep Sky Objects
14
Deep Sky Objects
14
Galaxy
(12)
— mag
4.4
Sa
13.5 mag
3.6
Sc
— mag
2.5
Sc
— mag
1.6
SABa
— mag
1.0
SBc
— mag
1.2
SABc
— mag
1.3
Sbc
— mag
2.5
Scd
— mag
1.8
S0
13.0 mag
2.6
S0
— mag
1.7
S0-a
— mag
S0