Hic habes indicem stellarum constellationis Scorpii.

Nomen
B
F
HD
HIP
Ascensio
recta
Declinatio
Magn.
app.
Magn.
abs.
Distat
(sla)
Classis
spectralis
Nomina alia; nota
Antares α 21 148478 80763 16h 29m 24.47s −26° 25′ 55.0″ 1.06 −5.28 604 M1Ib + B2.5V Cor Scorpii, Qalb al-Aqrab, Vespertilo;
16° stella più luminosa della volta celeste; stella binaria; stella variabilis
λ Sco λ 35 158926 85927 17h 33m 36.53s −37° 06′ 13.5″ 1.62 −5.05 703 B1.5IV+... Shaula
θ Sco θ 159532 86228 17h 37m 19.13s −42° 59′ 52.2″ 1.86 −2.75 272 F1II Sargas
δ Sco δ 7 143275 78401 16h 00m 20.01s −22° 37′ 17.8″ 2.29 −3.16 401 B0.2IV Dschubba, Al Jabba, Iclarkrau
ε Sco ε 26 151680 82396 16h 50m 10.24s −34° 17′ 33.4″ 2.29 0.78 65 K2IIIb Wei
κ Sco κ 160578 86670 17h 42m 29.28s −39° 01′ 47.7″ 2.39 −3.38 464 B1.5III Girtab
β1 Sco β1 8 144217 78820 16h 05m 26.23s −19° 48′ 19.4″ 2.56 −3.50 530 B0.5V Acrab, Akrab, Elacrab, El Acrab, Graffias, Grafias, Grassias
υ Sco υ 34 158408 85696 17h 30m 45.84s −37° 17′ 44.7″ 2.70 −3.31 518 B2IV Lesath, Lesuth
τ Sco τ 23 149438 81266 16h 35m 52.96s −28° 12′ 57.5″ 2.82 −2.78 430 B0V Alniyat, Al Niyat
π Sco π 6 143018 78265 15h 58m 51.12s −26° 06′ 50.6″ 2.89 −2.85 459 B1V + B2V Vrischika
σ Sco σ 20 147165 80112 16h 21m 11.32s −25° 35′ 33.9″ 2.90 −3.86 734 B1III + B1V +... Alniyat, Al Niyat, stella quadrupla
ι1 Sco ι1 161471 87073 17h 47m 35.08s −40° 07′ 37.1″ 2.99 −5.71 1791 F3Ia Apollyon
μ1 Sco μ1 151890 82514 16h 51m 52.24s −38° 02′ 50.4″ 3.00 −4.01 821 B1.5IV + B Denebakrab; stella variabilis generis Beta Lyrae
HD 161892 G 161892 87261 17h 49m 51.45s −37° 02′ 36.1″ 3.19 0.24 127 K0/K1III Basanismus
η Sco η 155203 84143 17h 12m 09.18s −43° 14′ 18.6″ 3.32 1.61 72 F3III-IVp
μ2 Sco μ2 151985 82545 16h 52m 20.15s −38° 01′ 02.9″ 3.56 −2.44 517 B2IV
ζ2 Sco ζ2 152334 82729 16h 54m 35.11s −42° 21′ 38.7″ 3.62 0.30 150 K4III
ρ Sco ρ 5 142669 78104 15h 56m 53.09s −29° 12′ 50.4″ 3.87 −1.62 409 B2IV/V
ω1 Sco ω1 9 144470 78933 16h 06m 48.43s −20° 40′ 08.9″ 3.93 −1.64 423 B1V Jabhat al Akrab
ν Sco ν 14 145502 79374 16h 11m 59.74s −19° 27′ 38.3″ 4.00 −1.63 436 B2IV Jabbah, Jabah, Lesath; stella quintupla
ξ1 Sco ξ1 144069 78727 16h 04m 21.63s −11° 22′ 24.8″ 4.16 F6IV Grafias; systema stellare
HD 149447 H 149447 81304 16h 36m 22.46s −35° 15′ 19.3″ 4.18 −0.90 339 K5III
HD 148703 N 148703 80911 16h 31m 22.94s −34° 42′ 15.6″ 4.24 −2.56 746 B2III-IV
HD 159433 Q 159433 86170 17h 36m 32.85s −38° 38′ 05.5″ 4.26 1.03 144 G8/K0III/IV
ω2 Sco ω2 10 144608 78990 16h 07m 24.30s −20° 52′ 07.2″ 4.31 −0.24 265 G6/G8III Jabhat al Akrab
ο Sco ο 19 147084 80079 16h 20m 38.18s −24° 10′ 09.4″ 4.55 −3.24 1177 A4II/III Alniyat, Al Niyat
13 Sco c2 13 145482 79404 16h 12m 18.21s −27° 55′ 34.7″ 4.58 −1.20 468 B2V
2 Sco A 2 142114 77840 15h 53m 36.73s −25° 19′ 37.5″ 4.59 −1.03 434 B2.5Vn
1 Sco b 1 141637 77635 15h 50m 58.75s −25° 45′ 04.4″ 4.63 −1.39 522 B1.5Vn
ζ1 Sco ζ1 152236 82671 16h 53m 59.73s −42° 21′ 43.3″ 4.70 B1Iae
ξ2 Sco ξ2 144070 78728 16h 04m 22.10s −11° 22′ 23.0″ 4.77 pars systematis ξ Sco
ι2 Sco ι2 161912 87294 17h 50m 11.11s −40° 05′ 25.5″ 4.78 −5.50 3705 A6Ib
22 Sco i 22 148605 80815 16h 30m 12.48s −25° 06′ 54.6″ 4.79 −0.61 393 B3V
HD 161840 161840 87220 17h 49m 10.47s −31° 42′ 11.5″ 4.79 −1.56 607 B8Ib/II
HD 146624 d 146624 79881 16h 18m 17.92s −28° 36′ 49.6″ 4.80 1.63 140 A0V:
HD 154090 k 154090 83574 17h 04m 49.35s −34° 07′ 22.5″ 4.83 −4.74 2672 B2Iab
HD 163145 163145 87846 17h 56m 47.43s −44° 20′ 31.9″ 4.85 −0.29 347 K2III
HD 163376 163376 87936 17h 57m 47.81s −41° 42′ 58.5″ 4.88 −1.24 547 M0III
β2 Sco β2 8 144218 78821 16h 05m 26.58s −19° 48′ 06.6″ 4.90 −2.80 1132 B2V
ψ Sco ψ 15 145570 79375 16h 12m 00.00s −10° 03′ 51.1″ 4.93 1.41 165 A3IV
HD 143787 143787 78650 16h 03m 20.67s −25° 51′ 54.5″ 4.96 0.90 212 K3III
HD 153613 153613 83336 17h 01m 52.65s −32° 08′ 36.2″ 5.03 −0.86 491 B8V
HD 154948 154948 84033 17h 10m 42.35s −44° 33′ 27.2″ 5.06 0.24 300 G8/K0III+..
HD 145250 145250 79302 16h 11m 02.13s −29° 24′ 57.6″ 5.09 0.62 255 K0III
HD 157243 157243 85162 17h 24m 13.09s −44° 09′ 45.0″ 5.10 −1.73 756 B7III
HD 151804 151804 82493 16h 51m 33.72s −41° 13′ 49.9″ 5.23 −6.36 6792 O9e
χ Sco χ 17 145897 79540 16h 13m 50.91s −11° 50′ 15.8″ 5.24 −0.41 439 K3III
HD 148688 148688 80945 16h 31m 41.77s −41° 49′ 01.7″ 5.31 −6.79 8579 B1Ia
HD 144690 144690 79050 16h 08m 07.52s −26° 19′ 36.0″ 5.35 −0.23 425 M2III
HD 147513 147513 80337 16h 24m 01.24s −39° 11′ 34.8″ 5.37 4.82 42 G3/G5V planetam habet
HD 142165 142165 77858 15h 53m 53.92s −24° 31′ 59.1″ 5.38 −0.14 414 B5V
HD 147722 147722 80399 16h 24m 39.73s −29° 42′ 16.1″ 5.40 2.91 102 G0
HD 142184 142184 77859 15h 53m 55.87s −23° 58′ 40.9″ 5.41 0.01 393 B2V
HD 147628 147628 80390 16h 24m 31.77s −37° 33′ 57.5″ 5.42 −0.36 468 B8V
HD 142990 142990 78246 15h 58m 34.87s −24° 49′ 53.1″ 5.43 −0.45 488 B5V
16 Sco 16 145607 79387 16h 12m 07.29s −08° 32′ 51.3″ 5.43 1.01 250 A4V
HD 149404 149404 81305 16h 36m 22.57s −42° 51′ 31.9″ 5.46 −4.39 3047 O9Ia
HD 152234 152234 82676 16h 54m 01.84s −41° 48′ 23.0″ 5.46 −5.84 5927 B0.5Ia
HD 151078 151078 82135 16h 46m 47.97s −39° 22′ 36.8″ 5.48 0.21 369 K0III
27 Sco 27 152820 82960 16h 57m 11.17s −33° 15′ 34.1″ 5.48 −1.25 724 K5III
18 Sco 18 146233 79672 16h 15m 37.13s −08° 22′ 05.7″ 5.49 4.76 46 G1V stella simile al Sole
HD 144987 144987 79199 16h 09m 52.61s −33° 32′ 44.5″ 5.50 −0.12 433 B8V
HD 146836 146836 79980 16h 19m 32.68s −30° 54′ 24.4″ 5.53 2.44 135 F5IV
HD 156098 156098 84551 17h 17m 03.71s −32° 39′ 45.7″ 5.53 2.01 165 F6V
HD 160668 160668 86698 17h 42m 51.09s −36° 56′ 43.8″ 5.53 −0.57 542 K5III
HD 162587 162587 87569 17h 53m 23.47s −34° 53′ 42.4″ 5.58 −1.97 1055 K3III
HD 155806 155806 84401 17h 15m 19.25s −33° 32′ 54.3″ 5.60 −5.08 4466 O9
4 Sco 4 142445 77984 15h 55m 30.10s −26° 15′ 57.3″ 5.63 0.02 432 A3V
HD 150742 150742 81972 16h 44m 42.60s −40° 50′ 22.6″ 5.64 −0.26 492 B3V
HD 155259 155259 84150 17h 12m 16.22s −39° 30′ 24.4″ 5.66 1.61 211 A0/A1V
12 Sco c1 12 145483 79399 16h 12m 16.05s −28° 25′ 01.9″ 5.67 0.87 298 B9V
HD 159176 159176 86011 17h 34m 42.49s −32° 34′ 54.0″ 5.69 −4.40 3396 O5/6(e)
11 Sco 11 144708 79005 16h 07m 36.44s −12° 44′ 43.2″ 5.75 0.17 426 B9V
HD 156293 156293 84690 17h 18m 47.84s −44° 07′ 46.9″ 5.76 0.68 339 B9V
HD 152408 152408 82775 16h 54m 58.51s −41° 09′ 03.1″ 5.78 −6.56 9588 O8Iab+...
HD 148247 148247 80672 16h 28m 14.46s −37° 10′ 47.3″ 5.79 0.84 319 K1IIICN...
HD 149711 149711 81472 16h 38m 26.30s −43° 23′ 54.2″ 5.83 −0.79 686 B2.5IV
HD 142883 142883 78168 15h 57m 40.47s −20° 58′ 58.9″ 5.84 0.11 455 B3V
HD 150331 150331 81741 16h 41m 45.50s −33° 08′ 44.2″ 5.84 1.08 292 G1II
HD 152293 152293 82716 16h 54m 26.94s −42° 28′ 44.0″ 5.84 F5Ib-II
HD 158799 158799 85889 17h 33m 07.39s −41° 10′ 23.0″ 5.84 −1.55 982 B9Ib/II
HD 162391 162391 87472 17h 52m 19.76s −34° 25′ 00.6″ 5.84 −0.95 744 G8/K0III
HD 144844 144844 79098 16h 08m 43.73s −23° 41′ 07.3″ 5.86 0.28 426 B9V
HD 145191 145191 79320 16h 11m 17.77s −41° 07′ 10.2″ 5.86 1.66 226 F0IV
3 Sco 3 142301 77909 15h 54m 39.54s −25° 14′ 37.2″ 5.87 0.14 455 B8III/IV
HD 160928 160928 86847 17h 44m 42.01s −42° 43′ 45.5″ 5.87 1.29 269 A2/A3IV/V
HD 162374 162374 87460 17h 52m 13.66s −34° 47′ 57.1″ 5.88 −1.15 830 B6Ib
HD 144334 144334 78877 16h 06m 06.38s −23° 36′ 22.5″ 5.90 0.03 487 B8V
HD 145838 145838 79596 16h 14m 22.37s −33° 00′ 39.8″ 5.91 −0.56 643 K0III
HD 153890 153890 83491 17h 03m 50.87s −38° 09′ 09.0″ 5.91 1.88 209 F3V
HD 156384 156384 84709 17h 18m 56.36s −34° 59′ 22.5″ 5.91 6.69 23 K4V
HD 157097 157097 85048 17h 22m 54.73s −37° 13′ 14.5″ 5.91 0.36 421 K1III
HD 149886 149886 81523 16h 39m 05.24s −37° 13′ 02.1″ 5.93 0.31 434 B9.5V+...
HD 154783 154783 83896 17h 08m 47.55s −30° 24′ 12.8″ 5.93 1.36 267 Fm
HD 162189 162189 87390 17h 51m 32.57s −40° 46′ 20.4″ 5.94 −0.83 738 M2III
HD 152161 152161 82650 16h 53m 42.44s −43° 03′ 03.2″ 5.95 −1.81 1160 M3II/III
HD 153368 153368 83235 17h 00m 36.99s −35° 56′ 02.3″ 5.95 1.19 292 K2IIICN...
HD 155450 155450 84226 17h 12m 58.56s −32° 26′ 18.0″ 5.95 −4.35 3747 B1Ib
HD 155826 155826 84425 17h 15m 36.08s −38° 35′ 34.6″ 5.95 3.52 100 G0V
HD 146850 146850 79938 16h 19m 00.43s −14° 52′ 22.2″ 5.97 −1.15 865 K3IIICNpvar
HD 154310 154310 83693 17h 06m 20.20s −37° 13′ 39.1″ 5.98 0.42 422 A2IV
HD 158105 158105 85543 17h 28m 56.09s −36° 46′ 41.8″ 5.98 −0.47 637 K0III
HD 150894 150894 81992 16h 45m 00.21s −28° 30′ 34.8″ 5.99 −0.83 755 A3IV
HD 162724 162724 87616 17h 53m 54.77s −34° 45′ 09.8″ 6.00 −1.45 1009 B9IV/V
HD 160371 160371 86527 17h 40m 58.55s −32° 12′ 52.0″ 6.01 −2.35 1531 K3III + (G)
HD 162517 162517 87532 17h 52m 57.60s −35° 37′ 27.1″ 6.03 1.99 209 F2V
HD 150608 150608 81904 16h 43m 47.60s −38° 09′ 22.5″ 6.05 −0.62 703 B9II/III
HD 153072 153072 83100 16h 58m 52.25s −37° 37′ 13.5″ 6.05 1.47 269 A3III
HD 162496 162496 87516 17h 52m 49.22s −34° 06′ 53.4″ 6.05 −0.60 697 K1III
HD 162926 162926 87722 17h 55m 08.03s −36° 28′ 32.3″ 6.05 −0.75 748 B9.5III
HD 146001 146001 79622 16h 14m 53.44s −25° 28′ 36.9″ 6.06 0.30 462 B8V
HD 143619 143619 78575 16h 02m 39.40s −29° 08′ 08.8″ 6.07 0.37 451 K2/K3III
HD 148760 148760 80910 16h 31m 22.87s −26° 32′ 15.2″ 6.07 1.87 225 K1III
HD 152248 152248 82691 16h 54m 10.06s −41° 49′ 30.1″ 6.07 O7e
HD 146254 146254 79692 16h 15m 51.49s −14° 50′ 56.8″ 6.09 −0.28 614 A0III
HD 155974 155974 84489 17h 16m 21.68s −35° 44′ 58.1″ 6.09 3.55 105 F6V
HD 159707 159707 86311 17h 38m 08.45s −42° 52′ 48.7″ 6.09 −0.54 692 B8V
HD 151771 151771 82453 16h 51m 00.04s −37° 30′ 52.1″ 6.10 −0.99 853 B8II/III
HD 162817 162817 87671 17h 54m 27.12s −34° 28′ 00.2″ 6.10 −0.96 842 B9.5/A0III
HD 146954 146954 80066 16h 20m 32.63s −39° 25′ 48.8″ 6.11 0.20 496 B9V
HD 150591 150591 81914 16h 43m 54.09s −41° 06′ 47.9″ 6.14 0.28 485 B6/B7V
HD 157486 157486 85237 17h 25m 02.67s −34° 41′ 45.6″ 6.14 0.19 505 Ap...
HD 162586 162586 87567 17h 53m 19.58s −34° 43′ 50.9″ 6.14 −0.88 825 B4III
HD 142250 142250 77900 15h 54m 30.12s −27° 20′ 18.9″ 6.15 0.09 531 B7V
HD 154368 154368 83706 17h 06m 28.37s −35° 27′ 03.7″ 6.15 −1.67 1194 O9.5Iab
HD 158741 158741 85839 17h 32m 24.64s −34° 16′ 45.6″ 6.16 1.06 341 F2IV
HD 144927 144927 79173 16h 09m 31.76s −32° 38′ 56.2″ 6.18 1.07 344 K1III
HD 152667 152667 82911 16h 56m 35.98s −40° 49′ 24.4″ 6.18 B0.5Ia
HD 154153 154153 83650 17h 05m 48.47s −44° 06′ 18.4″ 6.18 2.08 215 A4III
HD 162396 162396 87523 17h 52m 52.47s −41° 59′ 45.8″ 6.19 3.62 107 F8V
HD 155940 155940 84445 17h 15m 51.36s −30° 12′ 38.2″ 6.20 0.92 370 B9/B9.5V
HD 150573 150573 81903 16h 43m 45.70s −41° 07′ 08.9″ 6.21 0.61 430 A4V
HD 143900 143900 78699 16h 03m 54.71s −24° 43′ 34.8″ 6.22 −0.09 597 K2/K3III
HD 159633 159633 86246 17h 37m 26.92s −38° 03′ 58.9″ 6.26 −3.44 2835 G2Ib
HD 152235 152235 82669 16h 53m 58.85s −41° 59′ 39.6″ 6.28 B1Ia
HD 154025 154025 83594 17h 05m 05.39s −45° 30′ 07.4″ 6.28 1.33 319 A2V
HD 163433 163433 87948 17h 57m 57.80s −39° 08′ 11.3″ 6.28 0.29 513 A0IV/V
HD 146834 146834 79945 16h 19m 07.71s −20° 13′ 04.9″ 6.29 0.40 490 K0III
HD 152636 152636 82855 16h 55m 57.74s −33° 30′ 24.8″ 6.29 0.03 581 K5III
ν Sco ν 14 145501 16h 11m 58.60s −19° 26′ 59.0″ 6.30 pars systematis ν Sco
HD 152424 152424 82783 16h 55m 03.33s −42° 05′ 27.0″ 6.30 O9Ia
HD 155276 155276 84151 17h 12m 16.55s −38° 49′ 20.7″ 6.30 1.03 370 K1IIICN...
HD 158042 158042 85549 17h 29m 00.86s −43° 58′ 26.0″ 6.30 −2.04 1516 B5III
HD 144585 144585 78955 16h 07m 03.53s −14° 04′ 16.8″ 6.32 4.02 94 G5V
HD 144661 144661 79031 16h 07m 51.90s −24° 27′ 44.2″ 6.32 0.97 384 B8IV/V
HD 145997 145997 79605 16h 14m 39.30s −18° 32′ 07.2″ 6.32 1.63 282 K1III
HD 157038 157038 85020 17h 22m 39.22s −37° 48′ 16.7″ 6.33 B4Ia+...
HD 152431 152431 82731 16h 54m 35.94s −30° 35′ 14.4″ 6.34 −0.09 631 A5IIIm...
HD 151965 151965 82554 16h 52m 27.42s −40° 43′ 23.2″ 6.35 0.07 588 B9p Si
HD 151932 151932 82543 16h 52m 19.25s −41° 51′ 16.2″ 6.36 WN...
HD 156325 156325 84650 17h 18m 20.51s −32° 33′ 11.1″ 6.36 −1.57 1259 B5III
HD 158156 158156 85589 17h 29m 25.60s −38° 31′ 01.0″ 6.38 1.34 332 A1V
HD 145792 145792 79530 16h 13m 45.50s −24° 25′ 19.4″ 6.40 0.69 453 B6IV
HD 146436 146436 79788 16h 16m 59.20s −20° 06′ 14.7″ 6.40 −0.03 631 G8III
HD 145964 145964 79599 16h 14m 28.89s −21° 06′ 27.2″ 6.41 1.29 345 B9V
HD 161390 161390 87042 17h 47m 07.30s −38° 06′ 43.5″ 6.41 1.07 381 A0V
HD 162725 162725 87624 17h 53m 58.13s −34° 49′ 51.8″ 6.41 −0.96 973 Ap...
HD 155603 155603 84332 17h 14m 27.66s −39° 45′ 59.9″ 6.42 K0Ia
HD 157060 157060 85019 17h 22m 37.90s −35° 54′ 39.4″ 6.42 3.58 121 F8V
HD 145100 145100 79203 16h 09m 55.31s −18° 20′ 25.6″ 6.43 2.96 161 F3V
HD 149174 149174 81198 16h 35m 07.77s −45° 14′ 39.2″ 6.43 0.06 614 K2/K3III
HD 158619 158619 85786 17h 31m 47.36s −33° 42′ 11.1″ 6.43 0.98 401 K2III
HD 160748 160748 86716 17h 43m 06.86s −33° 03′ 04.6″ 6.44 −3.13 2672 M1III
HD 147553 147553 80324 16h 23m 56.72s −33° 11′ 57.6″ 6.45 1.11 381 A0V+...
HD 150638 150638 81891 16h 43m 38.73s −32° 06′ 21.2″ 6.46 −0.44 784 B8V
HD 155985 155985 84556 17h 17m 05.54s −44° 46′ 42.9″ 6.46 B0.5Iab:
HD 163234 163234 87865 17h 56m 55.89s −40° 18′ 20.3″ 6.46 0.22 576 K3III
HD 150420 150420 81803 16h 42m 29.11s −37° 04′ 44.9″ 6.47 1.09 388 G3III
HD 153919 153919 83499 17h 03m 56.77s −37° 50′ 39.0″ 6.48 O5f
HD 159312 159312 86098 17h 35m 43.08s −37° 26′ 23.3″ 6.48 1.40 338 A0V
HD 153234 153234 83202 17h 00m 14.26s −44° 59′ 18.5″ 6.50 2.98 165 F3V
V636 Sco 156979 85035 17h 22m 46.48s −45° 36′ 51.4″ 6.68 F7/F8Ib/II
25 Sco 25 151179 82140 16h 46m 51.35s −25° 31′ 42.7″ 6.72 −0.10 755 K0II
RR Sco 152783 82912 16h 56m 37.85s −30° 34′ 48.1″ 6.97 −0.76 1148 M6IIIe
Scorpius X-1 12.2 9000 stella binaria ai raggi X
PSR B1620-26 12.2 5600 stella di neutroni/pumilio alba binaria orbitante cum un pianeta;
membro dell' ammasso globulare M4 (astronomia)


Nexus externi

recensere
 
A2412 Coronae Borealis

Andromeda  · Antlia  · Apus  · Aquarius  · Aquila  · Ara  · Aries  · Auriga  · Bootes  · Caelum  · Camelopardalis  · Cancer  · Canes Venatici  · Canis Maior  · Canis Minor  · Capricornus  · Carina  · Cassiopeia  · Centaurus  · Cepheus  · Cetus  · Chamaeleon  · Circinus  · Columba  · Coma Berenices  · Corona Australis  · Corona Borealis  · Corvus  · Crater  · Crux  · Cygnus  · Delphinus  · Dorado  · Draco  · Equuleus  · Eridanus  · Fornax  · Gemini  · Grus  · Hercules  · Horologium  · Hydra  · Hydrus  · Indus  · Lacerta  · Leo  · Leo minor  · Lepus  · Libra  · Lupus  · Lynx  · Lyra  · Mensa  · Microscopium  · Monoceros  · Musca  · Norma  · Octans  · Ophiuchus  · Orion  · Pavo  · Pegasus  · Perseus  · Phoenix  · Pictor  · Pisces  · Piscis Austrinus  · Puppis  · Pyxis  · Reticulum  · Sagitta  · Sagittarius  · Scorpius  · Sculptor  · Scutum  · Serpens  · Sextans  · Taurus  · Telescopium  · Triangulum  · Triangulum Australe  · Tucana  · Ursa Maior  · Ursa Minor  · Vela  · Virgo  · Volans  · Vulpecula