2406:
28:
571:
decreasing at a very fast mean rate of 2.1 seconds per year, the largest rate for any known system. The first observations of the system, in 1894, revealed a period of 1.6606 days, which decreased to 1.6581 days in 1993, showing a decrease rate that is variable with time, but with time intervals of
590:
10 solar masses per year; the variation of this rate causes the variation in the rate of period decrease. The alternative possibility is mass transfer from the more massive to the less massive star, which naturally tends to decrease the orbital period. This may create an
556:. The secondary component has a mass equal to 9.6 solar masses, radius of 7.4 solar radii and a brightness 1,900 times larger than the Sun's. The separation between the center of each star is only 15.3 solar radii. The system is viewed from a high
572:
10 to 30 years when it is constant. The transition between such intervals of constant change can be accompanied by very fast decreases in the period, such as of 15 seconds per year in 1975.
725:
Samus, N. N.; Durlevich, O. V.; Kazarovets, E. V.; Kireeva, N. N.; Pastukhova, E. N. (2009). "VizieR On-line Data
Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)".
2433:
850:
575:
The most probable explanation for the period decrease is mass transfer from the less massive to the more massive star and subsequent mass loss through the L
502:
has a maximum of 8.71, fading to 9.98 during primary eclipse and 9.42 during secondary eclipse. From its brightness, it's estimated to be around 6,000
2453:
2443:
1020:
586:, which is compensated by a decrease in the separation between the stars. In this model, the system is losing mass at a rate of about 5
2024:
2458:
57:
1045:
2438:
2371:
1782:
662:
1040:
777:
Drechsel, H.; Rahe, J.; Wargau, W.; Wolf, B. (June 1982). "The interacting early-type contact binary SV Centauri".
1257:
1029:
649:
443:
1807:
703:
40:
1013:
2448:
1643:
451:
447:
119:
582:
of the system, which is located on the outer side of the more massive star. The mass loss causes loss of
2231:
2226:
2126:
1415:
1224:
537:
421:
343:
2353:
2090:
1360:
976:
949:
906:
879:
816:
786:
748:
740:
730:
681:
248:
515:
160:
1812:
2428:
2409:
1943:
1938:
1933:
1006:
967:
Linnell, Albert P.; Scheick, Xania (October 1991). "Does SV Centauri harbor an accretion disk?".
922:
752:
744:
671:
568:
499:
102:
33:
807:
Schild, R. E.; Garrison, R. F.; Hiltner, W. A. (1983). "UBV photometry for southern OB stars".
1199:
1194:
1169:
1164:
1064:
53:
2322:
2055:
1109:
1087:
1082:
1077:
984:
914:
910:
824:
790:
691:
686:
583:
579:
545:
495:
408:
330:
232:
156:
472:
2312:
1139:
180:
78:
1832:
980:
953:
883:
842:
820:
734:
2340:
2019:
1405:
1400:
1184:
1134:
1124:
1104:
1099:
1072:
592:
564:
529:
435:
240:
220:
208:
2422:
1370:
1365:
1355:
1350:
1345:
1335:
1325:
1320:
1315:
1129:
1114:
1094:
926:
870:
Drechsel, H.; Lorenz, R. (April 1993). "Period of SV Centauri
Continues Decreasing".
533:
488:
484:
197:
151:
65:
2317:
2297:
2065:
1966:
1863:
1214:
1209:
1204:
1189:
1179:
1159:
1154:
1119:
553:
390:
363:
310:
283:
696:
653:
2246:
1928:
1923:
1918:
1913:
1908:
1903:
1898:
1893:
1888:
1883:
1878:
1873:
1868:
1488:
1478:
1433:
1310:
1305:
1300:
1290:
1174:
1149:
1144:
940:
Drechsel, H. (1994). "On the evolution state of the interacting binary SV Cen".
557:
141:
130:
91:
36:
2348:
2307:
2302:
2292:
1588:
1578:
1573:
1563:
1553:
1493:
1473:
1468:
1463:
1390:
1285:
1280:
1275:
1270:
1265:
1247:
1242:
1237:
1232:
596:
549:
503:
370:
323:
290:
255:
168:
27:
998:
2214:
2154:
2060:
1850:
1766:
1761:
1756:
1751:
1746:
1741:
1736:
1731:
1726:
1721:
1716:
1711:
1706:
1701:
1696:
1691:
1686:
1681:
1676:
1671:
1666:
1661:
1633:
1628:
1623:
1618:
1613:
1608:
1603:
1598:
1593:
1583:
1568:
1558:
1548:
1543:
1538:
1533:
1528:
1523:
1518:
1513:
1508:
1498:
1483:
1458:
1453:
1448:
1443:
1438:
1428:
1423:
1385:
1380:
1375:
1330:
897:
Herczeg, T. J.; Drechsel, H. (September 1985). "The period of SV Centauri".
616:
491:
70:
2389:
2384:
2276:
2271:
2266:
2261:
2256:
2251:
2241:
2236:
2221:
2209:
2204:
2199:
2194:
2189:
2184:
2179:
2174:
2169:
2164:
2159:
2149:
2144:
2139:
2134:
2080:
2075:
2029:
2014:
2009:
2004:
1999:
1994:
1989:
1984:
1979:
1948:
1792:
1656:
1651:
511:
2070:
1974:
1858:
1827:
1822:
1817:
1797:
1503:
1340:
918:
2379:
2117:
2103:
2095:
2085:
2047:
1802:
1787:
1395:
707:
541:
521:
507:
466:
428:
383:
350:
303:
260:
988:
828:
676:
544:. The primary component, the brighter star with 11,700 times the
1055:
224:
212:
1002:
658:
Data
Release 2: Summary of the contents and survey properties"
843:"V* SV Cen — Eclipsing binary of W UMa type (contact binary)"
2370:
2339:
2285:
2125:
2116:
2046:
1965:
1849:
1775:
1642:
1414:
1256:
1223:
1063:
1054:
652:; et al. (Gaia collaboration) (August 2018).
772:
770:
768:
766:
764:
762:
760:
1014:
851:Centre de Données astronomiques de Strasbourg
548:, is the less massive one with 7.7 times the
8:
802:
800:
96:−60° 33′ 57.757″
2367:
2336:
2122:
2043:
1962:
1846:
1060:
1021:
1007:
999:
942:Astronomische Gesellschaft Abstract Series
695:
685:
675:
644:
642:
640:
638:
636:
634:
595:around the less massive star, similar to
56:J2000
2434:Objects with variable star designations
809:Astrophysical Journal Supplement Series
608:
204:
872:Information Bulletin on Variable Stars
720:
718:
716:
18:
7:
727:VizieR On-line Data Catalog: B/gcvs
518:yield a similar distance of around
216:
16:Star in the constellation Centaurus
552:and has a radius of 6.8 times the
532:made of two hot B-type stars with
14:
2405:
2404:
26:
704:Gaia DR2 record for this source
239:0.4876 ± 0.0352
2454:Henry Draper Catalogue objects
2025:Scorpius–Centaurus association
1046:Centaurus in Chinese astronomy
899:Astrophysics and Space Science
619:. The All Sky Automated Survey
39:for SV Centauri, plotted from
1:
663:Astronomy & Astrophysics
697:10.1051/0004-6361/201833051
2475:
2444:B-type main-sequence stars
1041:List of stars in Centaurus
1030:Constellation of Centaurus
779:Astronomy and Astrophysics
540:of 23,000 and 14,000
2402:
2366:
2335:
2042:
1961:
1845:
1036:
739:Originally published in:
617:"ASAS All Star Catalogue"
459:
441:
434:
356:
276:
271:
267:
174:
167:
113:
50:
24:
1361:V816 (Przybylski's Star)
911:1985Ap&SS.114....1H
791:1982A&A...110..246D
687:2018A&A...616A...1G
536:of B1V and B6.5III and
103:Apparent magnitude
2459:Durchmusterung objects
538:effective temperatures
969:Astrophysical Journal
191:−27.7 ± 6.3 km/s
2439:Beta Lyrae variables
2354:Shapley Supercluster
2091:Southern Crab Nebula
1808:PSR B1259−63/LS 2883
1088:C (Proxima Centauri)
2372:Astronomical events
1078:A (Rigil Kentaurus)
981:1991ApJ...379..721L
954:1994AGAb...10...95D
884:1993IBVS.3868....1D
821:1983ApJS...51..321S
753:2017AZh....94...87S
745:2017ARep...61...80S
735:2009yCat....102025S
516:Gaia Data Release 2
510:) away from Earth.
460:Database references
21:
2247:5128 (Centaurus A)
1934:Proxima Centauri b
919:10.1007/BF02463863
567:of SV Centauri is
514:measurements from
500:apparent magnitude
436:Other designations
259:(2,100 ± 100
207: −6.109
152:Variable type
120:Spectral type
19:
2416:
2415:
2398:
2397:
2362:
2361:
2331:
2330:
2112:
2111:
2100:
2038:
2037:
1957:
1956:
1841:
1840:
1818:WASP-15 (Nyamien)
528:SV Centauri is a
478:
477:
254:6,700 ± 500
219: 0.291
2466:
2408:
2407:
2368:
2337:
2123:
2098:
2056:Boomerang Nebula
2044:
1963:
1847:
1833:WASP-167/KELT-13
1783:2MASS J1126−5003
1061:
1023:
1016:
1009:
1000:
993:
992:
964:
958:
957:
937:
931:
930:
894:
888:
887:
867:
861:
860:
858:
857:
839:
833:
832:
804:
795:
794:
774:
755:
738:
722:
711:
701:
699:
689:
679:
646:
629:
628:
626:
624:
613:
589:
584:angular momentum
580:Lagrangian point
546:solar luminosity
524:
496:eclipsing binary
446: Centauri,
218:
206:
157:Eclipsing binary
114:Characteristics
106:
86:
81:
51:Observation data
30:
22:
2474:
2473:
2469:
2468:
2467:
2465:
2464:
2463:
2419:
2418:
2417:
2412:
2394:
2358:
2341:Galaxy clusters
2327:
2313:IRAS 13224-3809
2281:
2108:
2034:
1953:
1837:
1771:
1737:117618 (Dofida)
1638:
1410:
1252:
1219:
1050:
1032:
1027:
997:
996:
966:
965:
961:
939:
938:
934:
896:
895:
891:
869:
868:
864:
855:
853:
841:
840:
836:
806:
805:
798:
776:
775:
758:
724:
723:
714:
650:Brown, A. G. A.
648:
647:
632:
622:
620:
615:
614:
610:
605:
587:
578:
519:
455:
450:−59 3950,
414:
411:
396:
393:
376:
373:
336:
333:
316:
313:
296:
293:
258:
215:
186:
181:Radial velocity
101:
84:
79:Right ascension
77:
52:
46:
31:
17:
12:
11:
5:
2472:
2470:
2462:
2461:
2456:
2451:
2446:
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2436:
2431:
2421:
2420:
2414:
2413:
2403:
2400:
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2300:
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2287:
2283:
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2274:
2269:
2264:
2259:
2254:
2249:
2244:
2239:
2234:
2229:
2224:
2219:
2218:
2217:
2207:
2202:
2197:
2192:
2187:
2182:
2177:
2172:
2167:
2162:
2157:
2152:
2147:
2142:
2137:
2131:
2129:
2120:
2114:
2113:
2110:
2109:
2107:
2106:
2101:
2093:
2088:
2083:
2078:
2073:
2068:
2063:
2058:
2052:
2050:
2040:
2039:
2036:
2035:
2033:
2032:
2027:
2022:
2017:
2012:
2007:
2002:
1997:
1992:
1987:
1982:
1977:
1971:
1969:
1959:
1958:
1955:
1954:
1952:
1951:
1946:
1941:
1936:
1931:
1926:
1921:
1916:
1911:
1906:
1901:
1896:
1891:
1886:
1881:
1876:
1871:
1866:
1861:
1855:
1853:
1843:
1842:
1839:
1838:
1836:
1835:
1830:
1825:
1820:
1815:
1813:PSR J1311–3430
1810:
1805:
1800:
1795:
1790:
1785:
1779:
1777:
1773:
1772:
1770:
1769:
1764:
1759:
1754:
1749:
1744:
1739:
1734:
1729:
1724:
1719:
1714:
1709:
1704:
1699:
1694:
1689:
1684:
1679:
1674:
1672:102117 (Uklun)
1669:
1664:
1659:
1654:
1648:
1646:
1640:
1639:
1637:
1636:
1631:
1626:
1621:
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1611:
1606:
1601:
1596:
1591:
1586:
1581:
1576:
1571:
1566:
1561:
1556:
1551:
1546:
1541:
1536:
1531:
1526:
1521:
1516:
1511:
1506:
1501:
1496:
1491:
1486:
1481:
1476:
1471:
1466:
1461:
1456:
1451:
1446:
1441:
1436:
1431:
1426:
1420:
1418:
1412:
1411:
1409:
1408:
1403:
1398:
1393:
1388:
1383:
1378:
1373:
1368:
1363:
1358:
1353:
1348:
1343:
1338:
1333:
1328:
1323:
1318:
1313:
1308:
1303:
1298:
1293:
1288:
1283:
1278:
1273:
1268:
1262:
1260:
1254:
1253:
1251:
1250:
1245:
1240:
1235:
1229:
1227:
1221:
1220:
1218:
1217:
1212:
1207:
1202:
1197:
1192:
1187:
1182:
1177:
1172:
1167:
1162:
1157:
1152:
1147:
1142:
1137:
1132:
1127:
1122:
1117:
1112:
1107:
1102:
1097:
1092:
1091:
1090:
1085:
1080:
1069:
1067:
1058:
1052:
1051:
1049:
1048:
1043:
1037:
1034:
1033:
1028:
1026:
1025:
1018:
1011:
1003:
995:
994:
989:10.1086/170547
959:
932:
889:
862:
834:
829:10.1086/190852
796:
785:(2): 246–262.
756:
712:
630:
607:
606:
604:
601:
593:accretion disk
576:
565:orbital period
534:spectral types
530:contact binary
476:
475:
470:
462:
461:
457:
456:
442:
439:
438:
432:
431:
425:
417:
416:
412:
409:
405:
399:
398:
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391:
387:
379:
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371:
367:
359:
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354:
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347:
339:
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331:
327:
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314:
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299:
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287:
279:
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237:
228:
227:
202:
193:
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184:
176:
175:
172:
171:
165:
164:
154:
148:
147:
144:
137:
136:
133:
126:
125:
124:B1V + B6.5III
122:
116:
115:
111:
110:
107:
98:
97:
94:
88:
87:
82:
74:
73:
68:
62:
61:
48:
47:
25:
15:
13:
10:
9:
6:
4:
3:
2:
2471:
2460:
2457:
2455:
2452:
2450:
2449:B-type giants
2447:
2445:
2442:
2440:
2437:
2435:
2432:
2430:
2427:
2426:
2424:
2411:
2401:
2391:
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2386:
2383:
2381:
2378:
2377:
2375:
2373:
2369:
2365:
2355:
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2344:
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2338:
2334:
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2321:
2319:
2316:
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2311:
2309:
2306:
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2301:
2299:
2296:
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2290:
2288:
2284:
2278:
2275:
2273:
2270:
2268:
2265:
2263:
2260:
2258:
2255:
2253:
2250:
2248:
2245:
2243:
2240:
2238:
2235:
2233:
2230:
2228:
2225:
2223:
2220:
2216:
2213:
2212:
2211:
2208:
2206:
2203:
2201:
2198:
2196:
2193:
2191:
2188:
2186:
2183:
2181:
2178:
2176:
2173:
2171:
2168:
2166:
2163:
2161:
2158:
2156:
2153:
2151:
2148:
2146:
2143:
2141:
2138:
2136:
2133:
2132:
2130:
2128:
2124:
2121:
2119:
2115:
2105:
2102:
2097:
2094:
2092:
2089:
2087:
2084:
2082:
2079:
2077:
2074:
2072:
2069:
2067:
2064:
2062:
2059:
2057:
2054:
2053:
2051:
2049:
2045:
2041:
2031:
2028:
2026:
2023:
2021:
2018:
2016:
2013:
2011:
2008:
2006:
2003:
2001:
1998:
1996:
1993:
1991:
1988:
1986:
1983:
1981:
1978:
1976:
1973:
1972:
1970:
1968:
1967:Star clusters
1964:
1960:
1950:
1947:
1945:
1942:
1940:
1937:
1935:
1932:
1930:
1927:
1925:
1922:
1920:
1917:
1915:
1912:
1910:
1907:
1905:
1902:
1900:
1897:
1895:
1892:
1890:
1887:
1885:
1882:
1880:
1877:
1875:
1872:
1870:
1867:
1865:
1862:
1860:
1857:
1856:
1854:
1852:
1848:
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1834:
1831:
1829:
1826:
1824:
1821:
1819:
1816:
1814:
1811:
1809:
1806:
1804:
1801:
1799:
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1794:
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1789:
1786:
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1780:
1778:
1774:
1768:
1765:
1763:
1760:
1758:
1755:
1753:
1750:
1748:
1745:
1743:
1740:
1738:
1735:
1733:
1730:
1728:
1725:
1723:
1720:
1718:
1715:
1713:
1710:
1708:
1705:
1703:
1700:
1698:
1695:
1693:
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1128:
1126:
1123:
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1100:γ (Muhlifain)
1098:
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631:
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581:
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569:monotonically
566:
561:
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547:
543:
539:
535:
531:
526:
523:
517:
513:
509:
505:
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498:, its visual
497:
493:
490:
489:constellation
486:
485:variable star
482:
474:
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454: 102552
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198:Proper motion
195:
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117:
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109:8.71 to 9.98
108:
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99:
95:
93:
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89:
85:11 47 57.2195
83:
80:
76:
75:
72:
69:
67:
66:Constellation
64:
63:
59:
55:
49:
44:
43:
38:
35:
29:
23:
2323:PKS 1353−341
2318:PKS 1144-379
2298:ESO 325-G004
1864:b Centauri b
1295:
972:
968:
962:
945:
941:
935:
902:
898:
892:
875:
871:
865:
854:. Retrieved
846:
837:
812:
808:
782:
778:
726:
667:
661:
655:
621:. Retrieved
611:
574:
562:
554:solar radius
527:
480:
479:
465:
427:14,000
420:
402:
382:
362:
349:23,000
342:
329:11,700
322:
302:
282:
247:
231:
196:
179:
41:
20:SV Centauri
1929:HIP 67522 b
1924:HIP 65426 b
1919:HD 121504 b
1914:HD 117618 b
1909:HD 117207 b
1904:HD 114729 b
1899:HD 114386 b
1889:HD 113538 b
1884:HD 101930 b
1879:HD 109749 b
1874:HD 103197 b
1869:HD 102117 b
1125:θ (Menkent)
1083:B (Toliman)
975:: 721–728.
905:(1): 1–13.
558:inclination
520:2,100
504:light-years
481:SV Centauri
422:Temperature
344:Temperature
142:color index
131:color index
92:Declination
37:light curve
2423:Categories
2349:Abell S740
2308:ESO 444-46
2303:ESO 383-76
2293:ESO 269-57
2066:G292.0+1.8
1851:Exoplanets
1115:ζ (Alnair)
856:2017-11-29
677:1804.09365
623:8 December
603:References
597:Beta Lyrae
560:of 81.8°.
550:solar mass
407:1900
403:Luminosity
324:Luminosity
169:Astrometry
2429:Centaurus
2061:Fleming 1
1225:Flamsteed
1095:β (Hadar)
927:121108005
492:Centaurus
389:7.4
369:9.6
357:Secondary
309:6.8
289:7.7
105: (V)
71:Centaurus
34:blue band
2410:Category
2390:SN 1986G
2385:SN 1895B
2118:Galaxies
2099:(RCW 86)
2081:NGC 5307
2076:NGC 3918
2030:Stock 16
2015:NGC 5662
2010:NGC 5617
2005:NGC 5460
2000:NGC 5316
1995:NGC 5281
1990:NGC 5286
1985:NGC 4230
1980:NGC 3766
1949:WASP-15b
1793:Gaia BH2
1634:5489 (c)
1629:5485 (c)
1624:5471 (b)
1614:5358 (v)
1594:5222 (y)
1589:5207 (N)
1584:5174 (z)
1579:5172 (M)
1574:5141 (Q)
1569:5089 (d)
1564:5071 (K)
1559:5041 (m)
1554:5035 (J)
1549:5006 (r)
1534:4940 (f)
1529:4889 (n)
1524:4888 (e)
1519:4874 (p)
1514:4831 (w)
1509:4817 (l)
1499:4748 (u)
1494:4732 (G)
1489:4724 (x)
1479:4712 (x)
1474:4682 (F)
1469:4652 (D)
1464:4620 (E)
1459:4546 (B)
1454:4537 (j)
1434:4476 (C)
1429:4466 (C)
1424:4460 (A)
1391:V945 (H)
1336:V763 (C)
1331:V761 (a)
1258:Variable
878:(1): 1.
512:Parallax
413:☉
395:☉
375:☉
335:☉
315:☉
295:☉
249:Distance
233:Parallax
2071:IC 2944
2048:Nebulae
1975:IC 2944
1859:2M1207b
1828:WASP-42
1823:WASP-41
1798:GJ 3737
977:Bibcode
950:Bibcode
907:Bibcode
880:Bibcode
817:Bibcode
815:: 321.
787:Bibcode
749:Bibcode
741:Bibcode
731:Bibcode
682:Bibcode
508:parsecs
506:(1,800
487:in the
277:Primary
272:Details
161:β Lyrae
58:Equinox
2380:SN 185
2104:SuWt 2
2096:SN 185
2086:RCW 79
1803:J1407b
1788:2M1207
1767:131399
1762:125595
1757:125072
1752:124448
1747:121504
1742:121228
1732:117207
1727:116434
1722:115600
1717:114729
1712:114386
1707:113766
1702:113538
1697:110113
1692:109749
1687:108236
1682:107914
1677:103197
1667:101930
1662:100453
948:: 95.
925:
847:SIMBAD
708:VizieR
670:. A1.
467:SIMBAD
384:Radius
304:Radius
135:−0.74
60:J2000
2286:Other
2155:4650A
1776:Other
1657:98176
1652:97413
1406:V1400
1401:V1369
1396:V1032
1248:4 (h)
1243:3 (k)
1238:2 (g)
1233:1 (i)
1065:Bayer
1056:Stars
923:S2CID
702:
672:arXiv
494:. An
483:is a
217:Dec.:
146:0.06
54:Epoch
2277:5419
2272:5408
2267:5398
2262:5291
2257:5253
2252:5161
2242:5114
2237:5102
2232:5091
2227:5090
2222:5026
2210:5011
2205:4976
2200:4945
2195:4744
2190:4743
2185:4730
2180:4729
2175:4709
2170:4706
2165:4696
2160:4683
2150:4622
2145:4603
2140:4444
2135:3783
1619:5371
1609:5297
1604:5241
1599:5224
1544:4989
1539:4979
1504:4796
1484:4721
1449:4523
1444:4522
1439:4499
1386:V863
1381:V886
1376:V885
1371:V842
1366:V831
1356:V810
1351:V803
1346:V779
1341:V766
1326:V752
1321:V744
1316:V346
876:3868
656:Gaia
625:2021
563:The
473:data
364:Mass
284:Mass
140:B−V
129:U−B
45:data
42:ASAS
2127:NGC
985:doi
973:379
915:doi
903:114
825:doi
783:110
706:at
692:doi
668:616
241:mas
235:(π)
221:mas
209:mas
205:RA:
200:(μ)
2425::
1644:HD
1416:HR
1311:DY
1306:BV
1301:SX
1296:SV
1291:RR
983:.
971:.
946:10
944:.
921:.
913:.
901:.
874:.
849:.
845:.
823:.
813:51
811:.
799:^
781:.
759:^
747:;
729:.
715:^
690:.
680:.
666:.
660:.
633:^
599:.
525:.
522:pc
452:HD
448:CD
444:SV
261:pc
256:ly
225:yr
213:yr
183:(R
163:)
32:A
2215:A
2020:ω
1944:d
1939:c
1894:c
1286:Y
1281:V
1276:U
1271:T
1266:R
1215:ψ
1210:χ
1205:φ
1200:υ
1195:υ
1190:τ
1185:σ
1180:ρ
1175:π
1170:ο
1165:ο
1160:ξ
1155:ξ
1150:ν
1145:μ
1140:λ
1135:κ
1130:ι
1120:η
1110:ε
1105:δ
1073:α
1022:e
1015:t
1008:v
991:.
987::
979::
956:.
952::
929:.
917::
909::
886:.
882::
859:.
831:.
827::
819::
793:.
789::
751::
743::
737:.
733::
710:.
700:.
694::
684::
674::
654:"
627:.
588:×
577:3
542:K
429:K
410:L
392:R
372:M
351:K
332:L
312:R
292:M
263:)
223:/
211:/
187:)
185:v
159:(
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