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 3.00 0.09 124 A5III AlaybasanIAU-Catalog of Star Names α Tri α 2 11443 8796 3.42 1.95 64 F6IV Mothallah, Ras al Mothallah, Caput Trianguli; rotating ellipsoidal variable γ Tri γ 9 14055 10670 4.03 1.24 118 A1Vnn ApduIAU-Catalog of Star Names δ Tri δ 8 13974 10644 4.84 4.66 35 G0V DeltotonIAU-Catalog of Star Names ι Tri ι 6 TZ 13480 10280 4.94 0.08 305 F5V comp SB Triminus, RS CVn variable, 14 Tri 14 15656 11784 5.15 −0.25 391 K5III variable star, 7 Tri ηIn Bode's UranographiaIn Flamsteed’s Atlas CoelestisDesignation is no longer used 7 13869 10559 5.25 0.48 293 A0V 10 Tri a 10 14252 10793 5.29 0.13 350 A2V 12 Tri c 12 15257 11486 5.29 1.90 155 F0III 15 Tri 15 16058 12086 5.38 M3III suspected slow irregular variable, R Tri R 16210 12193 5.40 1299 M4IIIe Mira variable, ε Tri ε 3 12471 9570 5.50 0.22 370 A2V binary star 11 Tri d 11 15176 11432 5.55 0.83 286 K1III: HD 10390 10390 7943 5.63 1.13 259 B9IV-V HD 11007 11007 8433 5.78 3.60 89 F8V HD 11928 11928 9132 5.84 0.02 476 M2III variable star, HD 15755 15755 11840 5.84 1.33 260 K0III 13 Tri 13 15335 11548 5.89 3.45 100 G0V HD 10348 10348 7906 5.97 −0.06 523 K0III HD 16187 16187 12160 6.07 0.36 452 K0 HD 16220 16220 12200 6.23 2.52 180 F8V 5 Tri 5 13372 10220 6.24 0.39 482 A1m HD 15464 15464 11651 6.26 0.98 371 K1III variable star, HD 10588 10588 8086 6.32 0.57 460 G8III-IV SB HD 13747 13747 10446 6.35 2.48 194 K1III HD 9298 9298 7147 6.39 −0.90 937 B7IIIMNp... 1 Tri 1 1047 7948 7.52 0.78 730 A2V HD 13189 13189 10085 7.57 1.23 602 K3II has a planet or a brown dwarf companion (b) HD 9446 9446 7245 8.35 4.74 172 G5V has two planets (b & c) HD 12545 XX 12545 9630 8.42 522 K0III RS CVn variable, X Tri X 12211 9383 8.86 2.76 541 A7V Algol variable, V Tri V 10.96 A3 β Lyr variable, RV Tri RV 11.21 A2: Algol variable WASP-56 11.46 G6 has a planet RW Tri RW 12.50 M0V Algol variable and nova-like star, HAT-P-38 12.56 812 G Horna; has a planet (b) AI Tri AI 15.30 M2.5 AM Her variable, Var 83 15.40 3000000 in Triangulum Galaxy; luminous blue variable, ; one of the most luminous stars known Var B 16.21 3000000 A in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known Var C 16.43 3000000 B in Triangulum Galaxy; luminous blue variable, ; one of the most luminous stars known Var 19 18.20 3000000 in Triangulum Galaxy; formerly thought to be a Cepheid variable M33 X-7 18.70 3000000 O6III in Triangulum Galaxy; High-mass X-ray binary; contains largest known stellar black hole Var A 3000000 F8Ia in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known Var 2 Y 3000000 Ofpe/WN9 in Triangulum Galaxy; luminous blue variable; one of the most luminous stars known LSPM J0207+3331 145 DA oldest white dwarf to host a circumstellar disk

See also List of stars by constellation

References