# List of stars in Triangulum

This is a list of notable stars in the constellation Triangulum, sorted by decreasing brightness.
| Name | B | F | Var | HD | HIP | RA | Dec | vis. mag. | abs. mag. | Dist. (ly) | Sp. class | Notes |
| β Tri | 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 | | | | | | 12$^h$ 13$^m$ 27.89$^s$ | +23° 03′ 20.45″ | 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.] |||||||||||||