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Constellations / Leo

Leo

Leonis

Northern 947 sq° Leo

Brightest star: Regulus

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Mythology

The Nemean Lion, slain by Heracles as his first labor. The lion's hide was impervious to weapons, so Heracles strangled it and wore its skin as armor.

Observing Highlights

A prominent zodiacal constellation with the bright star Regulus. Rich in galaxies including M65, M66, M95, M96, and M105 — the Leo Triplet and Leo I Group. Best seen in spring.

Main Stars

20
Regulus

Regulus

HIP 49669; Alpha Leo; 32 Leo

1.35 mag 175.9″ B: 8.2 B8IVn
Denebola

Denebola

HIP 57632; Beta Leo; 94 Leo

2.14 mag 39.1″ B: 15.7 A3V
Zosma

Zosma

HIP 54872; Delta Leo; 68 Leo

2.56 mag 207.8″ B: 10.9 A5IV(n)
Algieba

Algieba

HIP 50583; Gamma1 Leo; 41 Leo

2.61 mag 4.7″ B: 3.6 K1-IIIbFe-0.5
Ras Elased Australis

Ras Elased Australis

HIP 47908; Epsilon Leo; 17 Leo

2.98 mag G1II
Chort

Chort

HIP 54879; Theta Leo; 70 Leo

3.34 mag A2IV
Adhafera

Adhafera

HIP 50335; Zeta Leo; 36 Leo

3.44 mag 335.4″ B: 6.0 F0IIIa
Subra

Subra

HIP 47508; 14 Leo

3.52 mag 97.8″ B: 10.8 A5. V COMP
Eta Leo

HIP 49583; Eta Leo; 30 Leo

3.52 mag 0.4″ B: 8.4 A0Ib
Rho Leo

HIP 51624; Rho Leo; 47 Leo

3.85 mag B1.5Ib
Rasalas

Rasalas

HIP 48455; Mu Leo; 24 Leo

3.88 mag K2IIIb CN1 Ca1
Iota Leo

HIP 55642; Iota Leo; 78 Leo

3.94 mag 2.3″ B: 6.7 F3V
Sigma Leo

HIP 55434; Sigma Leo; 77 Leo

4.05 mag B9.5V s
Upsilon Leo

HIP 56647; Upsilon Leo; 91 Leo

4.30 mag 0.1″ G8.5IIICN-0.5
Alterf

Alterf

HIP 46750; Lambda Leo; 4 Leo

4.31 mag K5III
31 Leo

HIP 49637; 31 Leo

4.37 mag 8.2″ B: 13.6 K3.5IIIbFe-1
60 Leo

HIP 53954; 60 Leo

4.42 mag A1m
Kappa Leo

HIP 46146; Kappa Leo; 1 Leo

4.46 mag 2.1″ B: 9.7 K2III
Phi Leo

HIP 55084; Phi Leo; 74 Leo

4.47 mag 86.8″ B: 9.8 A7IVn
54 Leo

HIP 53417; 54 Leo

4.50 mag 6.9″ B: 6.3 A1V

Double Stars

15
Algieba

Algieba

HIP 50583; Gamma1 Leo; 41 Leo

2.61 mag 4.7″ B: 3.6 K1-IIIbFe-0.5
54 Leo

HIP 53417; 54 Leo

4.50 mag 6.9″ B: 6.3 A1V
90 Leo

HIP 56473; 90 Leo

5.95 mag 3.1″ B: 7.3 B4V
83 Leo

HIP 55846; 83 Leo

6.50 mag 28.6″ B: 7.5 K0IV
Tau Leo

HIP 55945; Tau Leo; 84 Leo

4.95 mag 89.2″ B: 7.5 G7.5IIIa
Iota Leo

HIP 55642; Iota Leo; 78 Leo

3.94 mag 2.3″ B: 6.7 F3V
6 Leo

HIP 46774; 6 Leo

5.07 mag 37.1″ B: 9.3 K2.5IIIbFe-0.5
31 Leo

HIP 49637; 31 Leo

4.37 mag 8.2″ B: 13.6 K3.5IIIbFe-1
44 Leo

HIP 51008; 44 Leo

5.61 mag 3.6″ B: 9.1 M3IIIabs
49 Leo

HIP 51802; 49 Leo

5.67 mag 2.1″ B: 7.9 A2V
HIP 53240
6.12 mag 35.2″ B: 8.7 K0III+G0V
7 Leo

HIP 47096; 7 Leo

6.36 mag 41.0″ B: 9.4 A1V
39 Leo

HIP 50384; 39 Leo

5.82 mag 7.8″ B: 11.3 F8Vb w
88 Leo

HIP 56242; 88 Leo

6.20 mag 15.4″ B: 9.1 G0V
DR Leo

HIP 47544

5.89 mag 29.6″ B: 13.6 K6III

Variable Stars

5
R Leo

HIP 48036

6.02 mag M8IIIe
Alterf

Alterf

HIP 46750; Lambda Leo; 4 Leo

4.31 mag K5III
56 Leo

HIP 53449; 56 Leo

5.81 mag 5.69 - 6.03 SR M5.5III
45 Leo

HIP 51213; 45 Leo

6.04 mag 6.01 - 6.03 ACV A0pSiCr:
19 Leo

HIP 48029; 19 Leo

6.45 mag 4.4 - 11.3 A7Vn

Deep Sky Objects

30
Galaxy (30)
M66

NGC 3627

8.9 mag 8.7 SABb
M65

NGC 3623

9.3 mag 10.0 SABa
NGC 3521
8.9 mag 9.5 SABbc
NGC 2903
8.9 mag 12.6 SBbc
M95

NGC 3351

9.7 mag 7.4 SBb
M96

NGC 3368

9.2 mag 7.1 SABab
NGC 3628
9.5 mag 14.8 SAb pec
NGC 3227
10.8 mag 5.6 SABa pec
NGC 3338
10.8 mag 5.5 Sc
NGC 3705
11.0 mag 5.0 SABa
NGC 2964
11.3 mag 3.0 Sbc
NGC 3507
11.0 mag 3.5 SBb
NGC 3384
10.0 mag 5.9 SB0
NGC 3810
10.8 mag 4.3 Sc
C40

NGC 3626

10.9 mag 3 S0-a
NGC 2905
10.0 mag 13.3
NGC 3041
11.5 mag 3.7 SABc
NGC 3162
11.6 mag 3.1 SABc
NGC 3646
11.2 mag 3.9 Sc
NGC 3684
11.7 mag 3.2 Sbc
NGC 3686
11.4 mag 3.3 SBbc
M105

NGC 3379

9.3 mag 4.5 E1
NGC 2968
11.8 mag 2.2 Sa
NGC 3067
11.7 mag 2.5 SABa
NGC 3367
11.5 mag 2.3 Sc
NGC 3655
11.6 mag 1.6 Sc
NGC 3681
11.7 mag 2.5 Sbc
NGC 3189
12.0 mag 4.5 Sa
NGC 3370
12.0 mag 3.1 SABc
NGC 3433
12.0 mag 3.5 Sc