This is a list of notable stars in the constellation Triangulum, sorted by decreasing brightness.

B

F

Var

HD

HIP

RA

Dec

Dist. (ly)

Notes

β

4

13161

10064

02^h 09^m 32.52^s

+34° 59′ 14.6″

3.00

0.09

124

A5III

α Tri

α

2

11443

8796

01^h 53^m 04.90^s

+29° 34′ 45.8″

3.42

1.95

64

F6IV

Mothallah, Ras al Mothallah, Caput Trianguli; rotating ellipsoidal variable

γ Tri

γ

9

14055

10670

02^h 17^m 18.84^s

+33° 50′ 50.4″

4.03

1.24

118

A1Vnn

δ Tri

δ

8

13974

10644

02^h 17^m 02.42^s

+34° 13′ 29.4″

4.84

4.66

35

G0V

ι Tri

ι

6

TZ

13480

10280

02^h 12^m 22.32^s

+30° 18′ 11.6″

4.94

0.08

305

F5V comp SB

RS CVn variable, ΔV = 0.09^m, P = 14.732 d

14 Tri

14

15656

11784

02^h 32^m 06.14^s

+36° 08′ 50.0″

5.15

−0.25

391

K5III

variable star, ΔV = 0.006^m, P = 0.08576 d

7 Tri

7

13869

10559

02^h 15^m 56.30^s

+33° 21′ 32.3″

5.25

0.48

293

A0V

10 Tri

10

14252

10793

02^h 18^m 56.99^s

+28° 38′ 33.6″

5.29

0.13

350

A2V

12 Tri

12

15257

11486

02^h 28^m 09.99^s

+29° 40′ 10.3″

5.29

1.90

155

F0III

15 Tri

15

16058

12086

02^h 35^m 46.80^s

+34° 41′ 15.7″

5.38

M3III

suspected slow irregular variable, ΔV = 0.14^m

R Tri

R

16210

12193

02^h 37^m 02.50^s

+34° 15′ 50.0″

5.40

1299

M4IIIe

Mira variable, V_max = 5.4^m, V_min = 12.6^m, P = 266.9 d

ε Tri

ε

3

12471

9570

02^h 02^m 57.97^s

+33° 17′ 02.9″

5.50

0.22

370

A2V

binary star

11 Tri

11

15176

11432

02^h 27^m 27.79^s

+31° 48′ 04.9″

5.55

0.83

286

K1III:

HD 10390

10390

7943

01^h 42^m 03.45^s

+35° 14′ 44.8″

5.63

1.13

259

B9IV-V

HD 11007

11007

8433

01^h 48^m 41.68^s

+32° 41′ 22.2″

5.78

3.60

89

F8V

HD 11928

11928

9132

01^h 57^m 43.74^s

+27° 48′ 16.3″

5.84

0.02

476

M2III

variable star, ΔV = 0.013^m, P = 50.65856 d

HD 15755

15755

11840

02^h 32^m 52.66^s

+34° 32′ 32.8″

5.84

1.33

260

K0III

13 Tri

13

15335

11548

02^h 28^m 48.54^s

+29° 55′ 53.7″

5.89

3.45

100

G0V

HD 10348

10348

7906

01^h 41^m 39.24^s

+30° 02′ 49.7″

5.97

−0.06

523

K0III

HD 16187

16187

12160

02^h 36^m 43.05^s

+31° 36′ 27.6″

6.07

0.36

452

K0

HD 16220

16220

12200

02^h 37^m 06.51^s

+32° 53′ 27.7″

6.23

2.52

180

F8V

5 Tri

5

13372

10220

02^h 11^m 25.00^s

+31° 31′ 35.1″

6.24

0.39

482

A1m

HD 15464

15464

11651

02^h 30^m 16.56^s

+33° 50′ 01.8″

6.26

0.98

371

K1III

variable star, ΔV = 0.005^m, P = 0.26973 d

HD 10588

10588

8086

01^h 43^m 50.15^s

+32° 11′ 31.2″

6.32

0.57

460

G8III-IV SB

HD 13747

13747

10446

02^h 14^m 37.88^s

+28° 41′ 29.1″

6.35

2.48

194

K1III

HD 9298

9298

7147

01^h 32^m 07.58^s

+34° 47′ 59.9″

6.39

−0.90

937

B7IIIMNp...

1 Tri

1

1047

7948

01^h 42^m 05.92^s

+29° 30′ 21.85″

7.52

0.78

730

A2V

HD 13189

13189

10085

02^h 09^m 40.17^s

+32° 18′ 59.2″

7.57

1.23

602

K3II

has a planet or a brown dwarf companion (b)

HD 9446

9446

7245

01^h 33^m 20.18^s

+29° 15′ 54.5″

8.35

4.74

172

G5V

has two planets (b & c)

HD 12545

XX

12545

9630

02^h 03^m 47.11^s

+35° 35′ 28.7″

8.42

522

K0III

RS CVn variable, V_max = 8.1^m, V_min = 8.7^m, P = 24.26007 d

X Tri

X

12211

9383

02^h 00^m 33.72^s

+27° 53′ 19.3″

8.86

2.76

541

A7V

Algol variable, V_max = 8.55^m, V_min = 11.27^m, P = 0.9715352 d

V Tri

V

01^h 31^m 47.10^s

+30° 22′ 01.6″

10.96

A3

β Lyr variable, V_max = 10.7^m, V_min = 11.8^m, P = 0.5852057 d

RV Tri

RV

02^h 13^m 18.16^s

+31° 01′ 01.6″

11.21

A2:

Algol variable

WASP-56

01^h 44^m 19.59^s

+31° 41′ 22.5″

11.46

G6

has a planet

RW Tri

RW

02^h 25^m 36.15^s

+28° 05′ 50.9″

12.50

M0V

Algol variable and nova-like star, V_max = 12.5^m, V_min = 15.61^m, P = 0.231883392 d

HAT-P-38

02^h 21^m 31.9^s

+32° 14′ 47″

12.56

812

G

Horna; has a planet (b)

AI Tri

AI

02^h 03^m 48.61^s

+29° 59′ 25.8″

15.30

M2.5

AM Her variable, V_max = 14.7^m, V_min = 18.2^m, P = 0.19174566 d

Var 83

01^h 34^m 10.91^s

+30° 34′ 37.4″

15.40

3000000

in Triangulum Galaxy; luminous blue variable, V_max = 15.4^m, V_min = 16.6^m; one of the most luminous stars known

Var B

01^h 33^m 49.20^s

+30° 38′ 09.1″

16.21

3000000

A

in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known

Var C

01^h 33^m 35.14^s

+30° 36′ 00.4″

16.43

3000000

B

in Triangulum Galaxy; luminous blue variable, V_max = 15.2^m, V_min = 17.2^m; one of the most luminous stars known

Var 19

01^h 33^m 57.1^s

+30° 45′ 12″

18.20

3000000

in Triangulum Galaxy; formerly thought to be a Cepheid variable

M33 X-7

01^h 33^m 34.13^s

+30° 32′ 11.3″

18.70

3000000

O6III

in Triangulum Galaxy; High-mass X-ray binary; contains largest known stellar black hole

Var A

01^h 32^m 32.52^s

+30° 30′ 22.4″

3000000

F8Ia

in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known

Var 2

Y

01^h 34^m 18.4^s

+30° 38′ 27″

3000000

Ofpe/WN9

in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known

LSPM J0207+3331

02^h 07^m 33.81^s

+33° 31′ 29.53″

145

DA

oldest white dwarf to host a circumstellar disk

Table legend:

• Name = Proper name
• B = Bayer designation
• F or/and G. = Flamsteed designation or Gould designation
• Var = Variable star designation
• HD = Henry Draper Catalogue designation number
• HIP = Hipparcos Catalogue designation number
• RA = Right ascension for the Epoch/Equinox J2000.0
• Dec = Declination for the Epoch/Equinox J2000.0

• vis. mag. = visual magnitude (m or m_v), also known as apparent magnitude
• abs. mag. = absolute magnitude (M_v)
• Dist. (ly) = Distance in light-years from Earth
• Sp. class = Spectral class of the star in the stellar classification system
• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.]

References

ESA (1997). "The Hipparcos and Tycho Catalogues". Retrieved 30 July 2012.
Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 30 July 2012.
Roman, N. G. (1987). "Identification of a Constellation from a Position". Retrieved 30 July 2012.
Samus, N. N.; Durlevich, O. V.; et al. (2004). "Combined General Catalogue of Variable Stars (GCVS4.2)". Retrieved 30 July 2012.
Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database, version 2012Feb)". Retrieved 30 July 2012.
"AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014.

Lists of stars by constellation

List of stars in ...

Constellation of Triangulum

Stars

Bayer	α (Mothallah) β γ δ ε ι
Flamsteed	1 5 7 10 11 12 13 14 15
Variable	R V X RW XX
HR	490 523
HD	9446 13189
Other	B324 HAT-P-38 (Horna) LSPM J0207+3331 M33-013406.63 M33 X-7 Romano's Star Var 83

Exoplanets	HAT-P-38b (Hiisi) HD 9446 b c HD 13189 b

Nebulae	588 595 604

Galaxies

NGC	Triangulum Galaxy 608 634 669 670 672 684 688 736 739 740 750 751 769 777 784 804 805 819 855 860 861 890 925 931 940 941 953 959 970 973 1060
Numbered	I II
Other	Arp 166 RD1

See also

References