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about every 0.48 days. It was the most active planet hosting star in their sample. The team studying the host star also found that L 34-26 is fast rotating with a rotation period of 2.83 days. The planet should not be influenced by the flares, because of the large orbital separation. The star is seen
343:
ratio, meaning that it formed inside a disk around L 34-26. In this scenario the most likely way COCONUTS-2b got in a higher orbit is by a stellar fly-by of two binaries or two planetary systems. In the second scenario L 34-26 is not actually young, but mimics youth due to tidal and/or magnetic
892:
Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, A.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; Bauer, James M.; Benford, Dominic J.; Bridge, Carrie R.; Lake, Sean E.
344:
interactions with an unseen companion. In this scenario COCONUTS-2b would be an old brown dwarf. In a third scenario COCONUTS-2b could be a captured old brown dwarf. This is however seen as unlikely due to the stellar fly-by requiring a low velocity.
393:
Due to its large orbital separation, COCONUTS-2b is a great laboratory to study the atmosphere and composition of young gas-giant exoplanets. Astronomers estimate the planet’s temperature to be around 434 K (161 °C; 322 °F).
728:
L 34-26, COCONUTS-2A, WISEPA J075108.79-763449.6, 1RXS J074912.9-764202, 2MASS J07491271-7642065, ASAS J074912-7641.9, Gaia DR1 5213167326052013184, Gaia DR2 5213167330349528064, Gaia DR3 5213167330349528064, NLTT 18592
1181:
1697:
335:
The peculiar properties of COCONUTS-2b could be explained with different scenarios as proposed by
Marocco et al. in 2024. The properties could be explained by a non-solar
863:
972:
1173:
2837:
1007:
1479:
Stelzer, B.; Bogner, M.; Magaudda, E.; Raetz, St. (2022). "Flares and rotation of M dwarfs with habitable zones accessible to TESS planet detections".
1202:
Marley, Mark S.; Fortney, Jonathan J.; Hubickyj, Olenka; Bodenheimer, Peter; Lissauer, Jack J. (2007-01-01). "On the
Luminosity of Young Jupiters".
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L 34-26, also known as COCONUTS-2A and TYC 9381-1809-1, is a M3-type dwarf star located 35 light-years away, in the constellation of
790:
1626:
1405:
57:
2361:
851:
430:
86:
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962:
1084:
Zhang, Zhoujian; Liu, Michael C.; Claytor, Zachary R.; Best, William M. J.; Dupuy, Trent J.; Siverd, Robert J. (2021-08-01).
124:
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2120:
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2074:
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1548:
1086:"The Second Discovery from the COCONUTS Program: A Cold Wide-orbit Exoplanet around a Young Field M Dwarf at 10.9 pc"
2345:
1638:
356:
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2214:
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1037:
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J07492-7642, RAVE J074912.7-764207, TIC 272232401, TYC 9381-1809-1, UCAC4 067-006518, USNO-B1.0 0132-00043434
2151:
776:
167:
46:. The planet in the center of the image stands out due to its red color. The host star is not pictured here.
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763:. The star is about one-third the mass of the Sun, with an age between 150 and 800 million years old.
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906:
852:"Massive COCONUTS exoplanet discovery led by UH grad student | University of Hawaiʻi System News"
812:
475:
286:
1649:
1033:
2448:
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1451:"Giant Exoplanet Orbits Its Host Star Once Every 1.1 Million Years | Astronomy | Sci-News.com"
1237:
1125:
932:
702:
492:
426:
895:"The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)"
300:(COCONUTS) survey, its association with L 34-26 was announced in 2021. At a distance of 35.5
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Marocco, Federico; Kirkpatrick, J. Davy; Schneider, Adam C.; et al. (2024-04-22).
720:
593:
573:
561:
309:
285:, it takes over one million years to complete one orbit around the star orbiting 7,506
174:
140:
92:
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2065:
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438:
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The planet was discovered in 2011 and was initially identified as a T9 free-floating
2112:
944:
2722:
1915:
1830:
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1400:
1249:
963:"Massive exoplanet 'Coconuts-2b' could help reveal the secrets of young gas giants"
670:
635:
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1325:
328:
of the host star and it is more likely that the planet formed on its own via high
37:
324:
The researchers found that it is unlikely that COCONUTS-2b was formed inside the
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771:
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1900:
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376:
301:
1241:
1174:"Astronomers Go Nuts For Closest Exoplanet Directly Imaged Ever: COCONUTS-2b"
1129:
936:
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2016:
1966:
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271:
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1997:
1961:
1948:
1814:
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1216:
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almost equator-on with i = 81.8±5.8 deg and might belong to the proposed
709:
2762:
2658:
2648:
1989:
1976:
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1825:
1796:
1714:
364:
329:
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2059:
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745:
694:
659:
613:
340:
336:
305:
1493:
1346:
1284:
1268:"Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE"
1233:
1102:
1920:
911:
383:
2371:
2029:
1533:
967:
577:
565:
186:
2318:
1537:
1330:
Data
Release 3. Summary of the content and survey properties"
1324:
Vallenari, A.; et al. (Gaia collaboration) (2023).
1148:
1004:
415:
L 34-26 (COCONUTS-2A) and its planetary companion in
352:
The planet has a spectral type of T9, based on a low
829:
image by the discoverers, showing planet COCONUTS-2b
2784:
2775:
2743:
2721:
2675:
2636:
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2535:
2467:
2379:
2370:
2223:
2148:
2046:
1873:
1687:
1669:
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363:/FIRE. This spectral type suggests high amounts of
244:
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185:
165:
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138:
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115:
103:
98:
84:
76:
56:
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1549:
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1069:
1067:
1065:
1063:
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1059:
1008:National Aeronautics and Space Administration
8:
30:
899:The Astrophysical Journal Supplement Series
469:−76° 42′ 06.72″
429:J2000.0
2781:
2740:
2718:
2672:
2376:
2337:
2323:
2315:
1556:
1542:
1534:
1319:
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36:
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1363:
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1283:
1215:
1119:
1101:
994:
992:
990:
910:
1261:
1259:
846:
844:
840:
786:
557:
296:WISEPA J075108.79−763449.6. During the
134:10 km) or ~0.1185 ly (~0.03633 pc)
956:
954:
401:
29:
2838:Exoplanets detected by direct imaging
1044:from the original on 21 December 2021
1014:from the original on 22 November 2021
975:from the original on 21 December 2021
866:from the original on 15 December 2021
7:
1455:Breaking Science News | Sci-News.com
887:
885:
883:
881:
27:Gas giant exoplanet orbiting L 34-26
569:
332:formation (aka hot-start process).
298:COol Companions ON Ultrawide orbiTS
779:, which is 400 million years old.
25:
2258:(Mars orbit insertion: Feb 2021;
2244:(Mars orbit insertion: Feb 2021;
2809:
2808:
2289:
2288:
2277:
2238:(Mars orbit insertion: Feb 2021)
2150:
1877:
1660:
1654:
1648:
1597:
1406:Extrasolar Planets Encyclopaedia
819:
804:
789:
592:91.8263 ± 0.0185
409:
2362:Chamaeleon in Chinese astronomy
1461:from the original on 2021-11-22
1380:Gaia DR3 record for this source
1184:from the original on 2021-11-22
1154:from the original on 2021-11-22
308:), COCONUTS-2b was the closest
2123:(rapidly-rotating brown dwarf)
860:University of Hawaiʻi at Mānoa
1:
2833:Exoplanets discovered in 2021
2304:Category:2022 in outer space
2299:Category:2021 in outer space
2294:Category:2020 in outer space
1399:Martin, Pierre-Yves (2021).
811:The planet COCONUTS-2b with
382:COCONUTS-2b might have both
320:Proposed formation scenarios
2357:List of stars in Chamaeleon
2346:Constellation of Chamaeleon
1511:10.1051/0004-6361/202142088
1365:10.1051/0004-6361/202243940
796:The COCONUTS-2 system with
2864:
2654:2MASS J11011926–7732383 AB
1639:James Webb Space Telescope
1481:Astronomy and Astrophysics
1334:Astronomy and Astrophysics
929:10.1088/0067-0049/197/2/19
856:University of Hawaiʻi News
770:found that L 34-26 showed
265:WISEPA J075108.79-763449.6
111:WISEPA J075108.79-763449.6
2806:
2739:
2717:
2671:
2352:
2272:
2205:(Bernardinelli-Bernstein)
1698:Asteroid close approaches
1646:
1569:
1272:The Astrophysical Journal
1204:The Astrophysical Journal
1090:The Astrophysical Journal
738:
726:
719:
715:
629:
624:
620:
520:
513:
486:
423:
407:
312:exoplanet to Earth until
254:
141:Orbital period (sidereal)
35:
2215:P/2021 U3 (Attard-Maury)
2166:C/2021 J1 (Maury-Attard)
1303:10.3847/1538-4357/ad3f1d
1121:10.3847/2041-8213/ac1123
1038:Open Exoplanet Catalogue
161:Physical characteristics
130:7,506.0 AU (1.12288
2729:η Chamaeleontis cluster
2265:Mars landing: May 2021)
2250:Mars landing: Feb 2021)
1503:2022A&A...665A..30S
1356:2023A&A...674A...1G
493:Evolutionary stage
476:Apparent magnitude
388:non-equilibrium process
117:Orbital characteristics
2284:Outer space portal
1608:Tiangong space station
1427:"Simbad - Object view"
357:near-infrared spectrum
2129:(massive white dwarf)
1431:simbad.cds.unistra.fr
1401:"Planet COCONUTS-2 b"
612:(10.890 ± 0.002
281:. With a mass of 6.3
80:August 2011 July 2021
1980:circumplanetary disk
1972:OGLE-2019-BLG-0960Lb
1679:Winchcombe meteorite
607:35.519 ± 0.007
572: -192.918
560: -102.154
316:was imaged in 2024.
2161:C/2021 A1 (Leonard)
2062:(elliptical galaxy)
1294:2024ApJ...967..147M
1226:2007ApJ...655..541M
1144:"Exoplanet-catalog"
1112:2021ApJ...916L..11Z
921:2011ApJS..197...19K
739:Database references
404:
390:in its atmosphere.
371:and low amounts of
326:protoplanetary disk
77:Discovery date
32:
2753:Chamaeleon complex
2210:C/2021 T4 (Lemmon)
1944:Lambda Serpentis b
1595:telescope launches
766:Researchers using
721:Other designations
505:Spectral type
402:
58:Discovered by
2820:
2819:
2802:
2801:
2771:
2770:
2735:
2734:
2713:
2712:
2685:Cha 110913−773444
2667:
2666:
2312:
2311:
2116:astrophysical jet
1888:Alpha Centauri Ab
777:Ursa Major corona
757:
756:
258:
257:
106:Alternative names
42:COCONUTS-2b with
16:(Redirected from
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2812:
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2782:
2741:
2719:
2673:
2377:
2339:
2332:
2325:
2316:
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2282:
2281:
2280:
2204:
2193:
2179:
2177:
2176:
2172:(248370) 2005 QN
2154:
2121:2MASS J0348−6022
2102:
2100:
2099:
2089:
2087:
2086:
2056:(distant quasar)
2034:
1892:
1881:
1861:
1859:
1858:
1854:(163899) 2003 SD
1844:
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1750:(231937) 2001 FO
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1254:
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1219:
1217:astro-ph/0609739
1199:
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1169:
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1134:
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1123:
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1051:
1049:
1030:
1024:
1023:
1021:
1019:
996:
985:
984:
982:
980:
961:Kooser, Amanda.
958:
949:
948:
914:
889:
876:
875:
873:
871:
848:
823:
808:
793:
692:
668:
644:
571:
559:
543:
541:
487:Characteristics
479:
459:
454:
424:Observation data
413:
405:
379:of COCONUTS-2b.
274:that orbits the
229:
228:
227:
200:
199:
198:
133:
87:Detection method
40:
33:
21:
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2858:
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2823:
2822:
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2767:
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2604:
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2348:
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2308:
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2268:
2225:
2219:
2203:
2199:
2192:
2188:
2174:
2173:
2170:
2144:
2109:(spiral galaxy)
2097:
2096:
2093:
2084:
2083:
2080:
2068:sextuple system
2042:
2032:
1985:TIC 172900988 b
1939:Lalande 21185 c
1890:
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1856:
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1594:
1593:Space probe and
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1323:
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1311:
1265:
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1257:
1201:
1200:
1196:
1187:
1185:
1172:Siegel, Ethan.
1171:
1170:
1166:
1157:
1155:
1142:
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1137:
1083:
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1057:
1047:
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1032:
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976:
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891:
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869:
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849:
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837:
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824:
815:
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794:
785:
734:
690:
676:
673:
666:
652:
649:
642:
611:
568:
539:
537:
532:
527:Radial velocity
474:
457:
452:Right ascension
450:
425:
419:
414:
400:
373:carbon monoxide
354:signal-to-noise
350:
322:
314:Epsilon Indi Ab
310:directly imaged
247:
225:
223:
222:
220:
217:
215:Surface gravity
207:
204:
196:
194:
193:
191:
180:
177:
170:
146:1101369.9 years
143:
131:
127:
125:Semi-major axis
108:
89:
71:
69:
67:
65:
63:
47:
28:
23:
22:
15:
12:
11:
5:
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2715:
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2711:
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2708:
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2697:
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2687:
2681:
2679:
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2656:
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2646:
2640:
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2606:
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2597:
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2411:
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2309:
2307:
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2286:
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2266:
2251:
2239:
2229:
2227:
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2217:
2212:
2207:
2201:
2196:
2190:
2185:
2180:
2168:
2163:
2157:
2155:
2146:
2145:
2143:
2142:
2141:(radio source)
2136:
2133:WISE 1534–1043
2130:
2127:ZTF J1901+1458
2124:
2118:
2110:
2104:
2091:
2078:
2069:
2063:
2057:
2054:QSO J0313−1806
2050:
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2035:
2027:
2026:
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2014:
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1530:External links
1528:
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1471:
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1388:
1309:
1255:
1234:10.1086/509759
1210:(1): 541–549.
1194:
1164:
1135:
1055:
1025:
1000:"COCONUTS-2 b"
986:
950:
893:(2011-12-01).
877:
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62:Zhoujian Zhang
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2135:(brown dwarf)
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2033:(unconfirmed)
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551:Proper motion
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439:Constellation
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72:Robert Siverd
61:
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45:
39:
34:
19:
2694:
2297:
2260:
2253:
2247:Perseverance
2246:
2236:Mars mission
2233:
1916:Kepler-1704b
1895:
1831:3361 Orpheus
1630:
1618:
1615:(April 2021)
1610:
1484:
1480:
1474:
1463:. Retrieved
1454:
1445:
1434:. Retrieved
1430:
1421:
1410:. Retrieved
1404:
1337:
1333:
1327:
1275:
1271:
1207:
1203:
1197:
1186:. Retrieved
1177:
1167:
1156:. Retrieved
1147:
1138:
1093:
1089:
1046:. Retrieved
1034:"COCONUTS-2"
1028:
1016:. Retrieved
1003:
977:. Retrieved
966:
902:
898:
868:. Retrieved
855:
813:Gemini-South
765:
758:
744:
701:
682:
658:
634:
600:
584:
549:
525:
458:07 49 12.678
392:
381:
351:
334:
323:
291:
264:
261:COCONUTS-2 b
260:
259:
99:Designations
68:William Best
66:Zach Claytor
2695:COCONUTS-2b
2226:exploration
2194:(PanSTARRS)
2107:ALESS 073.1
2047:Discoveries
1911:HD 110082 b
1906:HD 108236 f
1896:COCONUTS-2b
1848:4660 Nereus
1048:21 December
1018:21 December
979:21 December
870:21 December
684:Temperature
465:Declination
369:water vapor
302:light-years
294:brown dwarf
276:M-type star
236:Temperature
168:Mean radius
70:Trent Dupuy
64:Michael Liu
31:COCONUTS-2b
2848:Chamaeleon
2843:Gas giants
2827:Categories
2700:HD 63454 b
2677:Exoplanets
2075:black hole
1901:Gliese 486
1875:Exoplanets
1641:(Dec 2021)
1635:(Nov 2021)
1623:(Oct 2021)
1494:2207.03794
1465:2021-11-22
1436:2023-11-28
1412:2023-11-28
1347:2208.00211
1285:2404.14324
1278:(2): 147.
1188:2021-11-22
1158:2021-11-22
1103:2107.02805
1096:(2): L11.
835:References
761:Chamaeleon
669:0.11
645:0.02
544: km/s
515:Astrometry
444:Chamaeleon
377:atmosphere
348:Atmosphere
173:1.12±0.04
2255:Tianwen-1
2242:Mars 2020
2200:C/2014 UN
2189:C/2014 OG
2183:8P/Tuttle
2077:candidate
1967:NGTS-14Ab
1688:Selected
1632:LICIACube
1519:249662585
1374:244398875
1242:0004-637X
1130:0004-637X
937:0067-0049
912:1108.4677
905:(2): 19.
498:Red dwarf
478: (V)
398:Host star
272:exoplanet
269:gas giant
240:434 ± 9 K
52:Discovery
2814:Category
2777:Galaxies
2758:NGC 3195
2690:ChaHα8 b
2469:Variable
2113:PJ352–15
2072:V723 Mon
2038:YSES 2 b
1962:NGTS-13b
1949:LHS 1678
1459:Archived
1182:Archived
1152:Archived
1042:Archived
1012:Archived
973:Archived
945:16850733
864:Archived
693:69
675:☉
651:☉
602:Distance
586:Parallax
433:J2000.0
403:L 34-26
361:Magellan
283:Jupiters
2763:IC 2631
2745:Nebulae
2659:L 34-26
2649:CHXR 73
2261:Zhurong
2149:Comets
2095:2021 DR
2082:2018 AG
2017:TOI-755
1990:TOI-178
1977:PDS 70c
1926:L 98-59
1921:KOI-5Ab
1865:2018 AH
1837:1994 WR
1826:2019 XS
1815:2021 UA
1803:2021 TP
1797:2021 SG
1786:2016 AJ
1774:2021 PH
1762:2021 GW
1733:2021 DW
1721:2016 DV
1715:2020 XR
1704:2021 AV
1583: »
1574:«
1499:Bibcode
1487:: A30.
1352:Bibcode
1290:Bibcode
1250:7793365
1222:Bibcode
1108:Bibcode
917:Bibcode
827:Allwise
783:Gallery
625:Details
431:Equinox
375:in the
365:methane
330:entropy
306:parsecs
279:L 34-26
267:, is a
155:L 34-26
18:L 34-26
2705:OTS 44
2644:ChaHα8
2628:116852
2623:115088
2224:Space
2060:ID2299
2030:Vega b
1612:Tianhe
1517:
1384:VizieR
1372:
1340:: A1.
1248:
1240:
1178:Forbes
1128:
943:
935:
798:unWISE
746:SIMBAD
660:Radius
417:unWISE
386:and a
384:clouds
341:oxygen
337:carbon
304:(10.9
44:unWISE
2637:Other
2381:Bayer
2372:Stars
2263:rover
2103:(TNO)
2090:(TNO)
1515:S2CID
1489:arXiv
1378:
1370:S2CID
1342:arXiv
1280:arXiv
1246:S2CID
1212:arXiv
1098:arXiv
941:S2CID
907:arXiv
689:3,406
665:0.388
570:Dec.:
482:11.3
427:Epoch
359:with
263:, or
226:−0.18
224:+0.11
2794:2915
2600:5188
2595:4976
2590:4649
2585:4509
2580:4507
2575:4397
2570:4385
2565:4268
2560:4170
2555:3695
2550:3543
2545:3393
2234:Hope
1690:NEOs
1627:DART
1620:Lucy
1581:2022
1576:2020
1328:Gaia
1238:ISSN
1126:ISSN
1050:2021
1020:2021
981:2021
968:CNET
933:ISSN
872:2021
768:TESS
752:data
641:0.37
636:Mass
542:0.61
538:1.19
509:M3V
339:-to-
221:4.11
197:−1.9
195:+1.5
187:Mass
151:Star
2786:NGC
2202:271
2191:392
2175:173
1857:220
1789:193
1507:doi
1485:665
1382:at
1360:doi
1338:674
1298:doi
1276:967
1230:doi
1208:655
1116:doi
1094:916
925:doi
903:197
710:Myr
703:Age
594:mas
588:(π)
574:mas
562:mas
558:RA:
553:(μ)
230:dex
192:6.3
2829::
2610:HD
2537:HR
2527:DY
2522:DX
2517:DR
2512:DI
2507:CU
2502:CT
2497:RZ
2492:RS
2302:—
2296:—
2098:15
2085:37
1933:f?
1840:12
1806:21
1777:27
1753:32
1629:/
1513:.
1505:.
1497:.
1483:.
1457:.
1453:.
1429:.
1403:.
1391:^
1368:.
1358:.
1350:.
1336:.
1332:.
1312:^
1296:.
1288:.
1274:.
1270:.
1258:^
1244:.
1236:.
1228:.
1220:.
1206:.
1180:.
1176:.
1150:.
1146:.
1124:.
1114:.
1106:.
1092:.
1088:.
1058:^
1040:.
1036:.
1010:.
1006:.
1002:.
989:^
971:.
965:.
953:^
939:.
931:.
923:.
915:.
901:.
897:.
880:^
862:.
858:.
854:.
843:^
731:PM
614:pc
609:ly
578:yr
566:yr
529:(R
367:,
287:AU
250:T9
2487:Z
2482:T
2477:R
2459:π
2454:ν
2449:μ
2444:μ
2439:κ
2434:ι
2429:θ
2424:η
2419:ζ
2414:ε
2409:δ
2404:δ
2399:γ
2394:β
2389:α
2338:e
2331:t
2324:v
2024:c
2021:b
2011:g
2008:f
2005:e
2002:d
1998:c
1994:b
1956:c
1953:b
1930:e
1818:1
1765:4
1736:1
1724:1
1707:7
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