2433:
37:
1127:
Siwak, Michał; Winiarski, Maciej; Ogłoza, Waldemar; Dróżdż, Marek; Zoła, Stanisław; Moffat, Anthony F. J.; Stachowski, Grzegorz; Rucinski, Slavek M.; Cameron, Chris; Matthews, Jaymie M.; Weiss, Werner W. (October 2018).
533:
per year. The primary has an uncertain spectral type and luminosity class. FU Orionis stars do not show strong emission lines during the outburst and have spectral features that resemble F- or G-type
475:
emission show a complex kinematic environment and signatures of disk rotation, which are asymmetric. The asymmetry of the disk rotation is explained with interactions of the disks during a
639:
Siwak, Michal; Rucinski, Slavek M.; Matthews, Jaymie M.; Kuschnig, Rainer; Guenther, David B.; Moffat, Anthony F. J.; Rowe, Jason F.; Sasselov, Dimitar; Weiss, Werner W. (June 2013).
885:
Pérez, Sebastián; Hales, Antonio; Liu, Hauyu Baobab; Zhu, Zhaohuan; Casassus, Simon; Williams, Jonathan; Zurlo, Alice; Cuello, Nicolás; Cieza, Lucas; Principe, David (January 2020).
525:
424:
system, which are assigned sequentially as new variables are discovered. FU Orionis is about 1,360 light years distant and is associated with the molecular cloud
2475:
711:
1247:
560:
425:
795:
78:
1240:
537:
during the maximum. The outer parts of FU Orionis stars produce a K-M supergiant spectrum, which can be observed in the
412:, that in 1937 rose in apparent visual magnitude from 16.5 to 9.6, and has since been around magnitude 9. The name
567:) and close to the star an arc-shaped nebula is visible. Other FU Orionis stars are associated with an arc-shaped
435:, was discovered, and a number of additional examples have been discovered since then. These stars constitute the
2470:
793:
The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General
Catalogue of Variable Stars
71:
2465:
2436:
1233:
464:
2245:
1823:
1277:
2416:
2408:
1960:
421:
42:
2460:
1828:
819:
Gaia
Collaboration (2018-08-01). "Gaia Data Release 2 - Summary of the contents and survey properties".
471:
and the secondary disk has a similar inclination and size. The disks are separated by about 250 au. The
1272:
494:
448:
1078:
Smith, H. A.; Thronson, H. A.; Lada, C. J.; Harper, D. A.; Loewenstein, R. F.; Smith, J. (July 1982).
2455:
1740:
417:
27:
19:
This article is about the particular star. For the type of variable stars named after this star, see
541:. The secondary, called FU Orionis south could be the more massive component in the system with 1.2
590:"The photometric evolution of FU Orionis objects: disc instability and wind–envelope interaction"
701:
2145:
1901:
1267:
140:
2480:
2091:
1838:
1537:
1256:
792:
409:
326:
91:
1155:
842:
1151:
1091:
1047:
979:
908:
838:
756:
662:
611:
385:
246:
8:
2020:
1095:
1051:
983:
912:
760:
666:
615:
2295:
1141:
1005:
969:
934:
898:
862:
828:
802:, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line December 8, 2008.
652:
601:
460:
123:
2150:
1352:
1306:
1169:
1109:
997:
938:
926:
854:
774:
769:
744:
624:
589:
568:
468:
64:
1009:
866:
2275:
2025:
1439:
1434:
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1382:
1377:
1372:
1367:
1362:
1357:
1287:
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916:
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619:
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230:
20:
1219:
1164:
1129:
850:
1489:
1282:
953:
799:
557:
534:
472:
436:
431:
For a long time this variable was considered unique, but in 1970 a similar star,
341:
176:
99:
1399:
921:
886:
364:
355:
238:
218:
206:
2449:
2390:
1808:
1527:
1479:
1173:
1113:
1001:
930:
858:
778:
538:
405:
397:
195:
171:
86:
2385:
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2250:
2080:
1950:
1803:
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1522:
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1507:
1502:
1497:
1404:
675:
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306:
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2066:
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Clarke, C.; Lodato, G.; Melnikov, S. Y.; Ibrahimov, M. A. (August 2005).
432:
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1934:
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1324:
1214:
1187:
1022:
887:"Resolving the FU Orionis System with ALMA: Interacting Twin Disks?"
467:. The primary is surrounded by a dust disk with a radius of 11
2359:
2354:
2349:
2344:
2339:
2290:
2260:
2235:
2230:
2214:
2209:
2204:
2199:
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2189:
2184:
2179:
2129:
2124:
2119:
2114:
2109:
2104:
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2015:
2010:
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1995:
1929:
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1846:
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1079:
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992:
957:
903:
833:
745:"The Nature and Evolutionary State of the FU Orionis Binary System"
348:
657:
36:
2285:
2005:
1990:
1965:
1955:
1881:
1818:
1813:
1339:
1334:
1329:
641:"Photometric variability in FU Ori and Z CMa as observed by MOST"
564:
74:
67:
451:
which display an extreme change in magnitude and spectral type.
2324:
2280:
2270:
2255:
2164:
1414:
706:
379:
333:
258:
2265:
1409:
1319:
638:
587:
482:
The primary, called FU Orionis north has a mass of 0.6
459:
FU Orionis consists of two components, both surrounded by a
1297:
222:
210:
1126:
1130:"Insights into the inner regions of the FU Orionis disc"
1215:
AAVSO Variable Star of the Month. FU Ori: February 2002
1077:
1040:
951:
497:
56:(2013), illustrates the short timescale variability.
2407:
818:
519:
645:Monthly Notices of the Royal Astronomical Society
594:Monthly Notices of the Royal Astronomical Society
2447:
884:
952:Wang, Hongchi; Apai, Dániel; Henning, Thomas;
1241:
880:
878:
876:
712:Centre de données astronomiques de Strasbourg
738:
736:
734:
732:
730:
728:
571:that becomes visible as the star brightens.
52:(2005). The inset plot, adapted from Siwak,
1027:
117:+09° 04′ 12.31″
1255:
1248:
1234:
873:
2042:
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1145:
1103:
1059:
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920:
902:
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768:
742:
725:
674:
656:
623:
605:
581:
743:Beck, Tracy L.; Aspin, C. (March 2012).
632:
16:Variable star in the constellation Orion
2476:Objects with variable star designations
1033:
202:
2448:
814:
812:
810:
808:
1229:
1080:"Far-infrared observations of FU Ori"
1073:
1071:
696:
694:
692:
690:
688:
686:
1016:
785:
70:
48:for FU Orionis, adapted from Clarke
805:
214:
13:
1068:
683:
556:FU Orionis is associated with the
14:
2492:
1208:
548:and a spectral type of about K5.
520:{\displaystyle 3.8\times 10^{-5}}
454:
2432:
2431:
1034:Townley, S. D. (December 1915).
625:10.1111/j.1365-2966.2005.09231.x
463:. Both disks were resolved with
35:
1180:
1120:
1036:"Designation of Variable Stars"
237:2.4029 ± 0.0497
945:
1:
1278:Orion molecular cloud complex
962:Astrophysical Journal Letters
574:
439:of variable stars, GCVS type
1134:Astronomy & Astrophysics
958:"FU Orionis: A Binary Star?"
821:Astronomy & Astrophysics
7:
1165:10.1051/0004-6361/201833401
851:10.1051/0004-6361/201833051
10:
2497:
1273:Orion in Chinese astronomy
770:10.1088/0004-6256/143/3/55
217: -2.834 ± 0.065
18:
2429:
2403:
2368:
2332:
2323:
2246:Becklin–Neugebauer Object
2223:
2172:
2163:
2138:
2090:
2079:
2038:
1943:
1900:
1837:
1739:
1536:
1305:
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1263:
551:
418:variable star designation
372:
361:
354:
299:
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269:
265:
205: 2.218 ± 0.079
189:
182:
134:
61:
33:
1188:"FU Orionis | aavso.org"
922:10.3847/1538-4357/ab5c1b
791:FU Ori, database entry,
749:The Astronomical Journal
1156:2018A&A...618A..79S
843:2018A&A...616A...1G
449:pre–main sequence stars
124:Apparent magnitude
2471:Durchmusterung objects
2146:Lambda Orionis Cluster
1268:List of stars in Orion
1257:Constellation of Orion
521:
2466:Orion (constellation)
2151:Trapezium Cluster (θ)
1084:Astrophysical Journal
891:Astrophysical Journal
522:
676:10.1093/mnras/stt441
495:
2409:Astronomical events
1222:at NightSkyInfo.com
1096:1982ApJ...258..170S
1052:1915PASP...27..209T
984:2004ApJ...601L..83W
913:2020ApJ...889...59P
761:2012AJ....143...55B
667:2013MNRAS.432..194S
616:2005MNRAS.361..942C
565:Lambda Orionis Ring
447:. These stars are
373:Database references
30:
2461:G-type supergiants
798:2017-06-20 at the
517:
469:astronomical units
461:circumstellar disk
443:, often nicknamed
356:Other designations
172:Variable type
141:Spectral type
26:
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2424:
2399:
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2319:
2318:
2159:
2158:
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2034:
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1023:AAVSO: FU Orionis
569:reflection nebula
391:
390:
2488:
2456:FU Orionis stars
2435:
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2276:Horsehead Nebula
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975:astro-ph/0311606
956:(January 2004).
954:Pascucci, Ilaria
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607:astro-ph/0505515
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437:FU Orionis class
300:FU Orionis south
275:FU Orionis north
252:1,360 ± 30
216:
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155:
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135:Characteristics
127:
107:
102:
62:Observation data
39:
31:
25:
21:FU Orionis stars
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2296:McNeil's Nebula
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2155:
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2030:
2026:WISE J0521+1025
2021:WISE J0457−0207
1939:
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800:Wayback Machine
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558:molecular cloud
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367:+09 5427.
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100:Right ascension
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1105:10.1086/160065
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1061:10.1086/122431
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993:10.1086/381705
968:(1): L83–L86.
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1325:γ (Bellatrix)
1323:
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1318:
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563:(part of the
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539:near-infrared
536:
512:
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491:and accretes
490:
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477:stellar flyby
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406:constellation
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366:
363:FU Ori,
360:
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145:uncertain + K
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87:Constellation
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32:
29:
22:
2481:Binary stars
2391:TXS 0506+056
2386:II Zwicky 28
2311:Orion Nebula
2251:Flame Nebula
1788:
1491:
1346:
1283:Orion's Belt
1195:. Retrieved
1191:
1182:
1137:
1133:
1122:
1087:
1083:
1046:(161): 209.
1043:
1039:
1029:
1018:
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715:. Retrieved
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305:
280:
245:
229:
194:
106:05 45 22.362
53:
49:
2067:HD 290327 b
1951:4U 0614+091
1340:ζ (Alnitak)
1335:ε (Alnilam)
1330:δ (Mintaka)
1090:: 170–176.
717:December 8,
702:"V* FU Ori"
535:supergiants
433:V1057 Cygni
402:binary star
327:Temperature
162:color index
113:Declination
46:light curve
2450:Categories
2417:GRB 991216
2381:CGCG 396-2
2306:Messier 78
2301:Messier 43
2241:Barnard 30
2062:HD 38529 b
2057:HD 37605 b
2052:HD 34445 b
2044:Exoplanets
1986:Gliese 221
1981:Gliese 208
1976:Gliese 205
1971:Gliese 179
1961:GRB 991216
1415:λ (Meissa)
1405:ι (Hatysa)
1347:(Algjebba)
1220:FU Orionis
1197:2020-02-08
1147:1807.09134
904:1911.11282
834:1804.09365
575:References
561:Barnard 35
426:Barnard 35
422:Argelander
414:FU Orionis
394:FU Orionis
332:4350
184:Astrometry
2376:4C +09.17
1538:Flamsteed
1455:π (Tabit)
1410:κ (Saiph)
1320:β (Rigel)
1174:0004-6361
1114:0004-637X
1002:0004-637X
939:208291454
931:0004-637X
897:(1): 59.
859:0004-6361
779:0004-6256
755:(3): 55.
658:1303.2568
510:−
502:×
312:1.2
287:0.6
126: (V)
43:blue band
2437:Category
2325:Galaxies
2291:LDN 1641
2261:HH 24-26
2236:Abell 13
2231:Abell 12
2083:clusters
2016:S Ori 70
2011:S Ori 52
2001:LP 658-2
1996:HOPS 383
1741:Variable
1492:(Thabit)
1010:17793369
867:49211658
796:Archived
546:☉
531:☉
488:☉
398:variable
347:~2
318:☉
293:☉
247:Distance
231:Parallax
2286:IC 2118
2165:Nebulae
2006:PDS 110
1991:GJ 3379
1966:G 99-47
1956:CVSO 30
1152:Bibcode
1140:: A79.
1092:Bibcode
1048:Bibcode
980:Bibcode
909:Bibcode
839:Bibcode
757:Bibcode
663:Bibcode
612:Bibcode
420:in the
270:Details
75:J2000.0
72:Equinox
68:J2000.0
2281:IC 434
2271:HH 111
2256:HH 1/2
1935:290327
1731:75 (l)
1726:74 (k)
1716:72 (f)
1706:69 (f)
1651:51 (b)
1646:49 (d)
1636:42 (c)
1616:32 (A)
1606:29 (e)
1601:27 (p)
1596:23 (m)
1591:22 (o)
1576:16 (h)
1566:14 (i)
1172:
1112:
1008:
1000:
937:
929:
865:
857:
827:: A1.
777:
707:SIMBAD
552:Nebula
380:SIMBAD
177:FU Ori
54:et al.
50:et al.
2369:Other
2266:HH 34
2224:Other
2139:Other
1944:Other
1930:42618
1925:37605
1920:37320
1915:34445
1910:33636
1829:V2384
1824:V2254
1819:V1352
1814:V1201
1809:V1005
1551:6 (g)
1307:Bayer
1298:Stars
1142:arXiv
1006:S2CID
970:arXiv
935:S2CID
899:arXiv
863:S2CID
829:arXiv
653:arXiv
602:arXiv
445:FUors
416:is a
410:Orion
396:is a
215:Dec.:
166:1.41
130:8.94
92:Orion
65:Epoch
2360:2119
2355:2110
2350:1924
2345:1819
2340:1683
2215:2174
2210:2071
2205:2067
2200:2064
2195:2023
2190:2022
2185:1999
2180:1788
2130:2202
2125:2194
2120:2175
2115:2169
2110:1981
2105:1980
2100:1662
2081:Star
1892:2275
1887:2251
1882:2024
1877:2007
1872:1988
1867:1952
1862:1887
1857:1874
1852:1763
1847:1759
1804:V883
1799:V380
1170:ISSN
1110:ISSN
998:ISSN
927:ISSN
855:ISSN
775:ISSN
719:2008
465:ALMA
400:and
386:data
307:Mass
282:Mass
160:B−V
79:ICRS
41:The
2333:NGC
2173:NGC
2092:NGC
1160:doi
1138:618
1100:doi
1088:258
1056:doi
988:doi
966:601
917:doi
895:889
847:doi
825:616
765:doi
753:143
671:doi
649:432
620:doi
598:361
499:3.8
408:of
349:Myr
342:Age
239:mas
233:(π)
219:mas
207:mas
203:RA:
198:(μ)
2452::
1902:HD
1839:HR
1794:GW
1789:FU
1784:DN
1779:BM
1774:BF
1769:VV
1764:UX
1721:73
1711:71
1701:68
1696:66
1691:64
1686:63
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1676:59
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1641:45
1631:38
1626:35
1621:33
1611:31
1586:21
1581:18
1571:15
1561:13
1556:11
1490:υ
1345:η
1190:.
1168:.
1158:.
1150:.
1136:.
1132:.
1108:.
1098:.
1086:.
1082:.
1070:^
1054:.
1044:27
1042:.
1038:.
1004:.
996:.
986:.
978:.
964:.
960:.
933:.
925:.
915:.
907:.
893:.
889:.
875:^
861:.
853:.
845:.
837:.
823:.
807:^
773:.
763:.
751:.
747:.
727:^
710:.
704:.
685:^
669:.
661:.
647:.
643:.
618:.
610:.
596:.
592:.
506:10
479:.
473:CO
441:FU
428:.
365:BD
259:pc
254:ly
223:yr
211:yr
152:−1
150:+2
81:)
1759:W
1754:U
1749:S
1546:5
1528:ω
1523:ψ
1518:ψ
1513:χ
1508:χ
1503:φ
1498:φ
1485:τ
1480:σ
1475:ρ
1470:π
1465:π
1460:π
1450:π
1445:π
1440:ο
1435:ο
1430:ξ
1425:ν
1420:μ
1400:θ
1393:H
1388:G
1383:F
1378:E
1373:D
1368:C
1363:B
1358:A
1353:θ
1249:e
1242:t
1235:v
1200:.
1176:.
1162::
1154::
1144::
1116:.
1102::
1094::
1064:.
1058::
1050::
1012:.
990::
982::
972::
941:.
919::
911::
901::
869:.
849::
841::
831::
781:.
767::
759::
721:.
679:.
673::
665::
655::
628:.
622::
614::
604::
543:M
528:M
513:5
485:M
334:K
315:M
290:M
261:)
221:/
209:/
147:5
77:(
23:.
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