325:. The planet has a density of approximately 9.33 g/cm and about 5.7 times the surface gravity of Earth. Such a high density for an object of this size implies that, like its sister planet, Kepler-277c is an enormous rock-based planet with a small portion of its mass as water. It is currently the third most massive and second largest terrestrial planet ever discovered, behind Kepler-277b in mass and
375:, with a temperature of 5946 K, a metallicity of -0.315 , and an unknown age. For comparison, the Sun has a temperature of 5778 K, a metallicity of 0.00 , and an age of about 4.5 billion years. The large radius in comparison to its mass and temperature suggest that Kepler-277 could be a
346:
takes 88 days to orbit the Sun at a distance of 0.38 AU. At this distance, Kepler-277c is very hot and most likely tidally locked to its host star. It is close to a 1:2 resonance with Kepler-277b, which orbits at an average distance of about 0.136 AU.
329:
in both radius and mass. Due to its proximity to its host star, Kepler-277c is quite hot with an equilibrium temperature of about 745 K (472 °C; 881 °F), hot enough to melt certain metals.
2033:
1561:
1214:
536:
428:
275:
with a very high mass and density for an object of its radius, suggesting a composition made mainly of rock with some amounts of water. Along with its sister planet,
338:
Kepler-277c orbits close to its host star, with one orbit lasting 33.006 days. Its semi-major axis, or average distance from the parent object, is about 0.209
296:
Kepler-277c was detected using the transit method and TTVs, allowing for both its mass and radius to be determined to some level. It is approximately 3.36
455:
Xie, Ji-Wei (7 January 2014). "Transit Timing
Variation of Near-Resonance Planetary Pairs. Ii. Confirmation of 30 Planets in 15 Multiple-Planet Systems".
311:
with no solid surface. However, the mass of Kepler-277c is extremely high for its size. Transit-timing variations indicate a planetary mass of about 64.2
511:
2023:
48:
2028:
582:
67:
1538:
755:
607:
27:
280:
132:
1181:
1854:
953:
727:
602:
515:
550:
2043:
474:
81:
1807:
268:
106:
32:
575:
490:
464:
260:
1412:
1392:
1382:
1377:
1362:
943:
938:
933:
928:
923:
918:
913:
908:
898:
893:
888:
1347:
1342:
1337:
1322:
1312:
1292:
1171:
1166:
1161:
1156:
1151:
1146:
1136:
1131:
1116:
1101:
1096:
1071:
1061:
1056:
1051:
1021:
1016:
1011:
1006:
1001:
996:
986:
976:
971:
1982:
1977:
1967:
1962:
1957:
1952:
1947:
1942:
1937:
1932:
1927:
1922:
1912:
1902:
1897:
1892:
1887:
1882:
1872:
1867:
1862:
883:
878:
863:
853:
848:
838:
833:
828:
823:
818:
813:
808:
803:
798:
793:
626:
339:
74:
1493:
783:
778:
773:
768:
482:
343:
326:
206:
59:
1533:
1518:
1498:
214:
478:
92:
2038:
2017:
664:
659:
568:
494:
486:
1799:
1780:
699:
654:
649:
308:
147:
1835:
1775:
1754:
1749:
1744:
1739:
1734:
1724:
1472:
694:
684:
674:
669:
644:
393:
276:
237:
1812:
1719:
1714:
1709:
1704:
1699:
1694:
1689:
1684:
1679:
1674:
1669:
1664:
1659:
1654:
1649:
1644:
1639:
1634:
1629:
1624:
1619:
1614:
1609:
1604:
1599:
1594:
1488:
1467:
1462:
1457:
1452:
1447:
1442:
1437:
1432:
1427:
1422:
1417:
1407:
1402:
1397:
1387:
1372:
1367:
1357:
1352:
903:
689:
639:
388:
356:
173:
119:
1589:
1584:
1579:
1574:
1569:
1552:
1332:
1327:
1317:
1307:
1302:
1297:
1287:
1282:
1277:
1272:
1267:
1262:
1257:
1252:
1247:
1242:
1237:
1204:
1199:
1194:
1189:
1141:
1126:
1121:
1111:
1106:
1091:
1086:
1081:
1076:
1066:
1046:
1041:
1036:
1031:
1026:
991:
981:
966:
961:
717:
712:
679:
272:
1972:
1917:
1907:
1877:
1817:
1770:
1513:
1232:
1227:
1222:
873:
868:
858:
843:
788:
745:
740:
735:
704:
376:
560:
1998:
1785:
1528:
1503:
763:
304:
230:
187:
1845:
1827:
1523:
1508:
617:
469:
264:
634:
591:
203:
159:
564:
361:
The parent star Kepler-277 is a large yellow star. It is 1.69
99:
263:
planet ever discovered, with a mass about 64 times that of
255:(also known by its Kepler Objects of Interest designation
423:
421:
419:
417:
415:
413:
411:
409:
2034:
Exoplanets discovered by the Kepler space telescope
1991:
1853:
1844:
1826:
1798:
1763:
1560:
1551:
1481:
1213:
1180:
952:
754:
726:
625:
616:
236:
212:
184:
158:
130:
125:
115:
105:
90:
80:
65:
58:
46:
38:
26:
21:
307:. At that radius, most planets should be gaseous
259:) is the third most massive and second-largest
576:
429:"Kepler-277 c CONFIRMED PLANET OVERVIEW PAGE"
8:
506:
504:
16:
457:The Astrophysical Journal Supplement Series
1850:
1557:
622:
583:
569:
561:
468:
450:
448:
279:, the planet's mass was determined using
405:
15:
242:745 K (472 °C; 881 °F)
7:
318:, close to Saturn's mass at 95.16
14:
271:, Kepler-277c is a Neptune-sized
281:transit-timing variations (TTVs)
1:
2024:Exoplanets discovered in 2014
342:. For comparison, the planet
267:. Discovered in 2014 by the
2060:
551:"A planet made of diamond"
487:10.1088/0067-0049/210/2/25
354:
1539:WISEP J190648.47+401106.8
608:Lyra in Chinese astronomy
598:
246:
93:Orbital period (sidereal)
126:Physical characteristics
33:Kepler Space Observatory
303:, close to the size of
60:Orbital characteristics
433:NASA Exoplanet Archive
269:Kepler Space Telescope
2029:Transiting exoplanets
1776:HD 173416 b (Wangshu)
603:List of stars in Lyra
592:Constellation of Lyra
292:Size and temperature
1771:HAT-P-5b (Kráľomoc)
512:"PHL's calculators"
479:2014ApJS..210...25X
39:Discovery date
28:Discovery site
18:
2011:
2010:
2007:
2006:
1794:
1793:
1547:
1546:
250:
249:
2051:
1851:
1558:
1504:HAT-P-5 (Chasoň)
623:
585:
578:
571:
562:
555:
554:
547:
541:
540:
533:
527:
526:
524:
523:
514:. Archived from
508:
499:
498:
472:
452:
443:
442:
440:
439:
425:
327:PSR J1719-1438 b
229:
228:
227:
202:
201:
200:
172:
171:
146:
145:
49:Detection method
19:
2059:
2058:
2054:
2053:
2052:
2050:
2049:
2048:
2014:
2013:
2012:
2003:
1987:
1840:
1822:
1808:δ Lyrae cluster
1790:
1759:
1543:
1499:GSC 02652-01324
1477:
1209:
1176:
948:
750:
722:
612:
594:
589:
559:
558:
549:
548:
544:
535:
534:
530:
521:
519:
510:
509:
502:
454:
453:
446:
437:
435:
427:
426:
407:
402:
385:
374:
371:
367:
364:
359:
353:
336:
324:
321:
317:
314:
302:
299:
294:
289:
287:Characteristics
225:
223:
222:
220:
217:
215:Surface gravity
198:
196:
195:
193:
190:
179:
176:
170:
167:
166:
165:
153:
150:
144:
141:
140:
139:
135:
95:
70:
68:Semi-major axis
51:
12:
11:
5:
2057:
2055:
2047:
2046:
2041:
2036:
2031:
2026:
2016:
2015:
2009:
2008:
2005:
2004:
2002:
2001:
1995:
1993:
1989:
1988:
1986:
1985:
1980:
1975:
1970:
1965:
1960:
1955:
1950:
1945:
1940:
1935:
1930:
1925:
1920:
1915:
1910:
1905:
1900:
1895:
1890:
1885:
1880:
1875:
1870:
1865:
1859:
1857:
1848:
1842:
1841:
1839:
1838:
1832:
1830:
1824:
1823:
1821:
1820:
1815:
1810:
1804:
1802:
1796:
1795:
1792:
1791:
1789:
1788:
1783:
1778:
1773:
1767:
1765:
1761:
1760:
1758:
1757:
1752:
1747:
1742:
1737:
1732:
1727:
1722:
1717:
1712:
1707:
1702:
1697:
1692:
1687:
1682:
1677:
1672:
1667:
1662:
1657:
1652:
1647:
1642:
1637:
1632:
1627:
1622:
1617:
1612:
1607:
1602:
1597:
1592:
1587:
1582:
1577:
1572:
1566:
1564:
1555:
1549:
1548:
1545:
1544:
1542:
1541:
1536:
1534:WISE 1828+2650
1531:
1526:
1521:
1519:LSR J1835+3259
1516:
1511:
1506:
1501:
1496:
1491:
1485:
1483:
1479:
1478:
1476:
1475:
1470:
1465:
1460:
1455:
1450:
1445:
1440:
1435:
1430:
1425:
1420:
1415:
1410:
1405:
1400:
1395:
1390:
1385:
1380:
1375:
1370:
1365:
1360:
1355:
1350:
1345:
1340:
1335:
1330:
1325:
1320:
1315:
1310:
1305:
1300:
1295:
1290:
1285:
1280:
1275:
1270:
1265:
1260:
1255:
1250:
1245:
1240:
1235:
1230:
1225:
1219:
1217:
1211:
1210:
1208:
1207:
1202:
1197:
1192:
1186:
1184:
1178:
1177:
1175:
1174:
1169:
1164:
1159:
1154:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1114:
1109:
1104:
1099:
1094:
1089:
1084:
1079:
1074:
1069:
1064:
1059:
1054:
1049:
1044:
1039:
1034:
1029:
1024:
1019:
1014:
1009:
1004:
999:
994:
989:
984:
979:
974:
969:
964:
958:
956:
950:
949:
947:
946:
941:
936:
931:
926:
921:
916:
911:
906:
901:
896:
891:
886:
881:
876:
871:
866:
861:
856:
851:
846:
841:
836:
831:
826:
821:
816:
811:
806:
801:
796:
791:
786:
781:
776:
771:
766:
760:
758:
752:
751:
749:
748:
743:
738:
732:
730:
724:
723:
721:
720:
715:
710:
702:
697:
692:
687:
682:
677:
672:
667:
662:
657:
652:
647:
642:
637:
631:
629:
620:
614:
613:
611:
610:
605:
599:
596:
595:
590:
588:
587:
580:
573:
565:
557:
556:
542:
528:
500:
444:
404:
403:
401:
398:
397:
396:
391:
384:
381:
372:
369:
365:
362:
355:Main article:
352:
349:
335:
332:
322:
319:
315:
312:
300:
297:
293:
290:
288:
285:
248:
247:
244:
243:
240:
234:
233:
218:
213:
210:
209:
191:
185:
182:
181:
177:
174:
168:
162:
156:
155:
151:
148:
142:
136:
131:
128:
127:
123:
122:
117:
113:
112:
109:
103:
102:
96:
91:
88:
87:
84:
78:
77:
71:
66:
63:
62:
56:
55:
52:
47:
44:
43:
40:
36:
35:
30:
24:
23:
13:
10:
9:
6:
4:
3:
2:
2056:
2045:
2042:
2040:
2037:
2035:
2032:
2030:
2027:
2025:
2022:
2021:
2019:
2000:
1997:
1996:
1994:
1990:
1984:
1981:
1979:
1976:
1974:
1971:
1969:
1966:
1964:
1961:
1959:
1956:
1954:
1951:
1949:
1946:
1944:
1941:
1939:
1936:
1934:
1931:
1929:
1926:
1924:
1921:
1919:
1916:
1914:
1911:
1909:
1906:
1904:
1901:
1899:
1896:
1894:
1891:
1889:
1886:
1884:
1881:
1879:
1876:
1874:
1871:
1869:
1866:
1864:
1861:
1860:
1858:
1856:
1852:
1849:
1847:
1843:
1837:
1834:
1833:
1831:
1829:
1825:
1819:
1816:
1814:
1811:
1809:
1806:
1805:
1803:
1801:
1800:Star clusters
1797:
1787:
1784:
1782:
1779:
1777:
1774:
1772:
1769:
1768:
1766:
1762:
1756:
1753:
1751:
1748:
1746:
1743:
1741:
1738:
1736:
1733:
1731:
1728:
1726:
1723:
1721:
1718:
1716:
1713:
1711:
1708:
1706:
1703:
1701:
1698:
1696:
1693:
1691:
1688:
1686:
1683:
1681:
1678:
1676:
1673:
1671:
1668:
1666:
1663:
1661:
1658:
1656:
1653:
1651:
1648:
1646:
1643:
1641:
1638:
1636:
1633:
1631:
1628:
1626:
1623:
1621:
1618:
1616:
1613:
1611:
1608:
1606:
1603:
1601:
1598:
1596:
1593:
1591:
1588:
1586:
1583:
1581:
1578:
1576:
1573:
1571:
1568:
1567:
1565:
1563:
1559:
1556:
1554:
1550:
1540:
1537:
1535:
1532:
1530:
1527:
1525:
1522:
1520:
1517:
1515:
1512:
1510:
1507:
1505:
1502:
1500:
1497:
1495:
1492:
1490:
1487:
1486:
1484:
1480:
1474:
1471:
1469:
1466:
1464:
1461:
1459:
1456:
1454:
1451:
1449:
1446:
1444:
1441:
1439:
1436:
1434:
1431:
1429:
1426:
1424:
1421:
1419:
1416:
1414:
1411:
1409:
1406:
1404:
1401:
1399:
1396:
1394:
1391:
1389:
1386:
1384:
1381:
1379:
1376:
1374:
1371:
1369:
1366:
1364:
1361:
1359:
1356:
1354:
1351:
1349:
1346:
1344:
1341:
1339:
1336:
1334:
1331:
1329:
1326:
1324:
1321:
1319:
1316:
1314:
1311:
1309:
1306:
1304:
1301:
1299:
1296:
1294:
1291:
1289:
1286:
1284:
1281:
1279:
1276:
1274:
1271:
1269:
1266:
1264:
1261:
1259:
1256:
1254:
1251:
1249:
1246:
1244:
1241:
1239:
1236:
1234:
1231:
1229:
1226:
1224:
1221:
1220:
1218:
1216:
1212:
1206:
1203:
1201:
1198:
1196:
1193:
1191:
1188:
1187:
1185:
1183:
1179:
1173:
1170:
1168:
1165:
1163:
1160:
1158:
1155:
1153:
1150:
1148:
1145:
1143:
1140:
1138:
1135:
1133:
1130:
1128:
1125:
1123:
1120:
1118:
1115:
1113:
1110:
1108:
1105:
1103:
1100:
1098:
1095:
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1073:
1070:
1068:
1065:
1063:
1060:
1058:
1055:
1053:
1050:
1048:
1045:
1043:
1040:
1038:
1035:
1033:
1030:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
973:
970:
968:
965:
963:
960:
959:
957:
955:
951:
945:
942:
940:
937:
935:
932:
930:
927:
925:
922:
920:
917:
915:
912:
910:
907:
905:
902:
900:
897:
895:
892:
890:
887:
885:
882:
880:
877:
875:
872:
870:
867:
865:
862:
860:
857:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
825:
822:
820:
817:
815:
812:
810:
807:
805:
802:
800:
797:
795:
792:
790:
787:
785:
782:
780:
777:
775:
772:
770:
767:
765:
762:
761:
759:
757:
753:
747:
744:
742:
739:
737:
734:
733:
731:
729:
725:
719:
716:
714:
711:
709:
708:
703:
701:
698:
696:
693:
691:
688:
686:
683:
681:
678:
676:
673:
671:
668:
666:
663:
661:
658:
656:
653:
651:
648:
646:
643:
641:
638:
636:
633:
632:
630:
628:
624:
621:
619:
615:
609:
606:
604:
601:
600:
597:
593:
586:
581:
579:
574:
572:
567:
566:
563:
552:
546:
543:
538:
532:
529:
518:on 2019-06-02
517:
513:
507:
505:
501:
496:
492:
488:
484:
480:
476:
471:
466:
462:
458:
451:
449:
445:
434:
430:
424:
422:
420:
418:
416:
414:
412:
410:
406:
399:
395:
392:
390:
387:
386:
382:
380:
378:
358:
350:
348:
345:
341:
333:
331:
328:
310:
309:Mini-Neptunes
306:
291:
286:
284:
282:
278:
274:
270:
266:
262:
258:
254:
245:
241:
239:
235:
232:
219:
216:
211:
208:
205:
192:
189:
183:
180:
163:
161:
157:
154:
137:
134:
129:
124:
121:
118:
114:
110:
108:
104:
101:
97:
94:
89:
85:
83:
79:
76:
72:
69:
64:
61:
57:
53:
50:
45:
41:
37:
34:
31:
29:
25:
20:
1781:HD 178911 Bb
1729:
706:
545:
537:"Kepler-277"
531:
520:. Retrieved
516:the original
460:
456:
436:. Retrieved
432:
360:
337:
295:
256:
252:
251:
82:Eccentricity
2044:Mega-Earths
1836:Ring Nebula
1027:7043 (Xihe)
680:η (Aladfar)
645:γ (Sulafat)
640:β (Sheliak)
394:Kepler-277b
277:Kepler-277b
257:KOI-1215.02
253:Kepler-277c
238:Temperature
169:−15.7
143:−0.72
133:Mean radius
107:Inclination
17:Kepler-277c
2018:Categories
1813:Messier 56
1553:Exoplanets
1489:Gliese 758
707:(Alathfar)
522:2018-01-21
438:2018-01-20
400:References
389:Mega-Earth
357:Kepler-277
120:Kepler-277
728:Flamsteed
495:119105092
470:1309.2329
463:(2): 25.
368:and 1.12
351:Host star
273:exoplanet
22:Discovery
1846:Galaxies
1818:NGC 6791
1514:LHS 6343
756:Variable
635:α (Vega)
383:See also
377:Subgiant
373:☉
366:☉
1999:IC 1296
1828:Nebulae
1786:TrES-1b
1529:WASP-58
1494:GJ 4063
475:Bibcode
344:Mercury
305:Neptune
188:density
98:33.006
73:~0.209
54:Transit
1562:Kepler
1524:WASP-3
1509:KSw 71
1215:Kepler
1205:181068
1200:180314
1195:179070
1190:177830
764:R (13)
493:
379:star.
197:+15.33
1992:Other
1764:Other
1482:Other
627:Bayer
618:Stars
491:S2CID
465:arXiv
334:Orbit
265:Earth
261:rocky
226:−2.93
224:+6.12
199:−5.69
186:Mean
164:64.2
138:3.36
2039:Lyra
1983:6792
1978:6765
1973:6745
1968:6740
1963:6713
1958:6710
1953:6703
1948:6702
1943:6700
1938:6695
1933:6692
1928:6688
1923:6686
1918:6685
1913:6675
1908:6672
1903:6671
1898:6665
1893:6663
1888:6662
1883:6657
1878:6646
1873:6640
1868:6612
1863:6606
1755:705b
1750:453b
1745:422b
1740:440b
1735:438b
1725:277b
1473:1513
1172:7382
1167:7376
1162:7359
1157:7346
1152:7345
1147:7338
1142:7302
1137:7284
1132:7280
1127:7272
1122:7253
1117:7244
1112:7238
1107:7237
1102:7212
1097:7204
1092:7202
1087:7181
1082:7162
1077:7146
1072:7140
1067:7132
1062:7118
1057:7115
1052:7112
1047:7081
1042:7073
1037:7064
1032:7044
1022:7041
1017:7033
1012:7030
1007:7019
1002:7017
997:7016
992:6997
987:6984
982:6968
977:6901
972:6853
967:6847
962:6845
944:V558
939:V550
934:V545
929:V543
924:V542
919:V533
914:V478
909:V477
904:V473
899:V404
894:V361
889:V344
221:5.69
194:9.33
160:Mass
116:Star
111:null
86:null
42:2014
1855:NGC
1720:93b
1715:91b
1690:62b
1685:60d
1680:59b
1665:37b
1660:26e
1650:25b
1630:24b
1600:20b
1595:14b
1468:705
1463:635
1458:444
1453:429
1448:421
1443:410
1438:350
1433:282
1428:279
1423:277
1418:238
1413:177
1408:174
1403:160
1398:138
1393:131
1388:130
1383:128
1378:109
1373:105
1368:104
1363:103
1358:102
1353:100
483:doi
461:210
2020::
1580:9b
1575:8b
1570:7b
1348:98
1343:95
1338:94
1333:93
1328:92
1323:91
1318:88
1313:75
1308:65
1303:62
1298:60
1293:59
1288:46
1283:38
1278:37
1273:30
1268:26
1263:25
1258:24
1253:20
1248:19
1243:14
1238:13
1182:HD
954:HR
884:MV
879:KX
874:HR
869:HP
864:HK
859:FL
854:EZ
849:EP
844:DM
839:CY
834:CN
829:CC
824:AY
819:XY
814:UZ
809:TZ
804:TT
799:RZ
794:RV
789:RR
746:19
741:17
736:16
705:μ
503:^
489:.
481:.
473:.
459:.
447:^
431:.
408:^
340:AU
301:🜨
283:.
207:cm
152:🜨
75:AU
1730:c
1710:f
1705:e
1700:d
1695:c
1675:d
1670:c
1655:c
1645:e
1640:d
1635:c
1625:g
1620:f
1615:e
1610:d
1605:c
1590:d
1585:c
1233:9
1228:8
1223:7
784:W
779:V
774:T
769:S
718:ν
713:ν
700:λ
695:κ
690:ι
685:θ
675:ζ
670:ζ
665:ε
660:ε
655:δ
650:δ
584:e
577:t
570:v
553:.
539:.
525:.
497:.
485::
477::
467::
441:.
370:M
363:R
323:E
320:M
316:E
313:M
298:R
231:g
204:g
178:E
175:M
149:R
100:d
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.