Circinus
Genitive: Circini
Southern
93 sq°
Cir
Brightest star: Alpha Circini
Mythology
Created by Lacaille in the 18th century to represent a drawing compass. One of the smallest constellations.
Observing Highlights
Contains the Circinus Galaxy, one of the closest Seyfert galaxies, and Alpha Circini, the brightest rapidly oscillating Ap star.
Main Stars
20
Main Stars
20HIP 71908; Alpha Cir
3.19 mag
15.7″
B: 8.5
A7VpSrCrEu Kn
HIP 74824; Beta Cir
4.07 mag
A3V
HIP 75323; Gamma Cir
4.51 mag
0.8″
B: 5.7
B5IV+F8
HIP 74837; Epsilon Cir
4.86 mag
K2.5III
HIP 74778; Delta Cir
5.09 mag
O8.5V
HIP 73129; Theta Cir
5.11 mag
0.1″
B: 5.9
B4Vnpe
HIP 73776; Eta Cir
5.17 mag
G8III
5.20 mag
K2III
5.36 mag
34.7″
B: 10.8
A9V
5.46 mag
5.5″
B: 12.0
O7.5III((f))
5.61 mag
A3Ib
5.67 mag
F7V
5.71 mag
K2III
5.73 mag
1.2″
B: 8.6
B0.5Ve
5.75 mag
K5-M0III
5.75 mag
B1.5III
5.83 mag
K1III
5.85 mag
K3III
HIP 72773
5.87 mag
5.65 - 6.09
DCEP
G3II+B8V
5.91 mag
47.2″
B: 8.6
B2.5Ve
Double Stars
15
Double Stars
15
5.91 mag
47.2″
B: 8.6
B2.5Ve
6.20 mag
6.5″
B: 9.5
K0III
6.04 mag
9.2″
B: 9.9
F7V
HIP 71908; Alpha Cir
3.19 mag
15.7″
B: 8.5
A7VpSrCrEu Kn
HIP 72121
6.10 mag
69.0″
B: 7.5
B2III
5.36 mag
34.7″
B: 10.8
A9V
5.46 mag
5.5″
B: 12.0
O7.5III((f))
5.73 mag
1.2″
B: 8.6
B0.5Ve
HIP 75323; Gamma Cir
4.51 mag
0.8″
B: 5.7
B5IV+F8
HIP 74778; Delta Cir
5.09 mag
O8.5V
HIP 74824; Beta Cir
4.07 mag
A3V
5.97 mag
F2III
6.05 mag
K4II
5.75 mag
B1.5III
5.83 mag
K1III
Variable Stars
1
Variable Stars
1HIP 72773
5.87 mag
5.65 - 6.09
DCEP
G3II+B8V
Deep Sky Objects
5
Deep Sky Objects
5
Open Cluster
(4)
Planetary Nebula
(1)
13.0 mag
0.1