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利用者:GeeKay/sandbox

曖昧さ回避 この項目では、2つ以上の太陽系外惑星を持つ惑星系について説明しています。全ての太陽系外惑星の一覧については「太陽系外惑星の一覧」をご覧ください。
2014年10月26日までに発見された各年の太陽系外惑星の発見数。

本稿では、複数惑星系の一覧について取り上げる。複数個の惑星を持つ惑星系は特に複数惑星系[1][2][3]（英語: Multiple planetary system[1]、Multiplanetary system）または多重惑星系[4][5]と呼ばれる。NASA Exoplanet Archive の統計によると、2024年11月1日時点で太陽系外惑星が確認されている4,314個の恒星のうち2個以上の惑星が確認されている複数惑星系は969個である[6]。既知の惑星系内における惑星数の最多記録は太陽系とケプラー90系の8個で、TRAPPIST-1系の7個がこれに次ぐ。

一覧

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一覧は3個以上の惑星がある事が知られている、もしくは2個の惑星と1個以上の未確認の惑星候補が存在している可能性がある複数惑星系を地球からの距離が近い順に並べている。最も近いのは2個の確実な惑星と1個の未確認の惑星を持つことが知られているプロキシマ・ケンタウリ系である（近い恒星の一覧も参照）。しかし、ほとんどの複数惑星系は地球から非常に遠い位置にあり、一番遠いとされている複数惑星系は13,300光年離れた位置にあるOGLE-2012-BLG-0026L系であるとされている。

恒星の赤経、赤緯、距離（ガイア計画[7]による観測などから求められた年周視差より計算）はSIMBADのデータに基づく。視等級は特記しない限り、可視光線で観測されるVバンドでの等級を示すが、それ以外の波長域のバンドによる等級の場合はそのバンド名を括弧付きで付している。

表の色は確認された惑星数を表す
2 3 4 5 6 7 8
主星名
 星座
 赤経
 赤緯
 視等級
 距離
（光年）
 スペクトル分類
 質量
（M☉）
 有効温度
（K）
 年齢
（億年）
 惑星数 出典
太陽 – - - −26.74 0.000016 G2V 1.000 5778 45.7 8 [8]
プロキシマ・ケンタウリ ケンタウルス座  14h 29m 42.9461s −62° 40′ 46.1647″ 11.13 4.247 M5Ve 0.154 2992 48.5 2 (1) [9][10][11][12]
ラランド21185 おおぐま座  11h 03m 20.1948s +35° 58′ 11.5761″ 7.520 8.304 M2V 0.389 3547 80.47 2 (1) [9][13]
ラカーユ9352 みなみのうお座  23h 05m 52.0358s −35° 51′ 11.0552″ 7.39 10.724 M2V 0.479 3672 45.7 2 (1) [9][14]
GJ 1061 とけい座  03h 35m 59.6992s −44° 30′ 45.7308″ 13.07 11.984 M5.5V 0.125 2977 >70 3 [9][15]
くじら座YZ星 くじら座  01h 12m 30.6369s −16° 59′ 56.3580″ 12.074 12.122 M4.0Ve 0.130 3056 50 3 [16]
ルイテン星 こいぬ座  07h 27m 24.4990s +05° 13′ 32.8415″ 9.872 12.348 M3.5V 0.29 3382 >80 2 (2) [17]
ティーガーデン星 おひつじ座  02h 53m 00.8918s +16° 52′ 52.6322″ 15.14 12.497 M7V 0.097 3034 >80 3 [18][19]
ウォルフ1061 へびつかい座  16h 30m 18.0584s −12° 39′ 45.3212″ 10.072 14.050 M3.5V 0.304 3307 3 [9][20]
グリーゼ876 みずがめ座  22h 53m 16.7326s −14° 15′ 49.3041″ 10.192 15.238 M3.5V 0.346 3201 1 - 99 4 [9][21]
エリダヌス座82番星 エリダヌス座  03h 19m 55.6509s −43° 04′ 11.2152″ 4.27 19.704 G6V 0.91 5473 57.6 3 [22][23][24]
グリーゼ581 てんびん座  15h 19m 26.8269s −07° 43′ 20.1895″ 10.560 20.549 M3V 0.295 3500 95 3 (1) [25][26]
グリーゼ892 カシオペヤ座  23h 13m 16.9750s +57° 10′ 06.0838″ 5.570 21.336 K3V 0.81 4700 110 6 [27][28]
グリーゼ667C さそり座  17h 18m 58.8273s −34° 59′ 48.6127″ 10.22 23.623 M1.5V 0.327 3443 61 2 (1) [9][29][30]
おとめ座61番星 おとめ座  13h 18m 24.3140s −18° 18′ 40.2977″ 4.740 27.840 G6.5V 0.94 5556 61 - 66 3 [24][31]
グリーゼ433 うみへび座  11h 35m 26.9478s −32° 32′ 23.8842″ 9.813 29.605 M2V 0.48 3445 3 [32][33][34]
グリーゼ357 うみへび座  09h 36m 01.6372s −21° 39′ 38.8776″ 10.906 30.776 M2.5V 0.342 3505 3 [35]
ルイテン98-59 とびうお座  08h 18m 07.6214s −68° 18′ 46.8054″ 11.685 34.599 M3V 0.273 3415 >8 4 (2) [36]
グリーゼ180 エリダヌス座  04h 53m 49.9799s −17° 46′ 24.3093″ 10.894 38.972 M2V 0.432 3572 50 3 [34][37][38]
グリーゼ806 はくちょう座  20h 45m 04.0992s +44° 29′ 56.6451″ 10.704 39.348 M1.5V 0.413 3600 10 - 80 2 (1) [39]
TRAPPIST-1 みずがめ座  23h 06m 29.3685s −05° 02′ 29.0373″ 18.798 40.66 M7.5e 0.089 2566 76 7 [40][41]
HD 69830 とも座  08h 18m 23.9470s −12° 37′ 55.8172″ 5.95 41.03 G8V 0.863 5394 106 3 [42]
かに座55番星A かに座  08h 52m 35.8111s +28° 19′ 50.9550″ 5.95 41.05 K0IV-V 0.905 5172 86 5 [43][44]
HD 40307 がか座  05h 54m 04.2405s −60° 01′ 24.4930″ 7.147 42.179 K2.5V 0.77 4977 12 4 (2) [45][46]
アンドロメダ座υ星A アンドロメダ座  01h 36m 47.8415s +41° 24′ 19.6514″ 4.10 44 F9V 1.27 6114 31.2 3 [47][48][49]
おおぐま座47番星 おおぐま座  10h 59m 27.9728s +40° 25′ 48.9206″ 5.03 45.3 G1V 1.08 5887 60.3 3 [50][51][52]
おおかみ座ν2星 おおかみ座  15h 21m 48.1499s −48° 19′ 03.4699″ 5.65 48.07 G4V 0.876 5664 117 3 [53][54]
LHS 1140 くじら座  00h 44m 59.3309s −15° 16′ 17.5428″ 14.150 48.8 M4.5V 0.184 3096 >50 2 (1) [55]
グリーゼ163 りゅう座  04h 09m 15.6683s −53° 22′ 25.2900″ 11.811 49.36 M3.5V 0.405 3460 50 5 [9][56][57]
さいだん座μ星 さいだん座  17h 44m 08.7031s −51° 50′ 02.5916″ 5.15 50.89 G3IV-V 1.10 5820 63.4 4 [58][59]
グリーゼ676A さいだん座  17h 30m 11.2045s −51° 38′ 13.1303″ 9.585 52.12 M0V 0.631 4014 4 [9][60]
HD 128311 うしかい座  14h 36m 00.5603s +09° 44′ 47.4546″ 7.446 53.28 K3V 0.828 4763 <64 2 (1) [61]
HD 7924 カシオペヤ座  01h 21m 59.1137s +76° 42′ 37.0383″ 7.167 55.46 K0.5V 0.81 5216 30 3 [62][63]
かんむり座ρ星 かんむり座  16h 01m 02.6605s +33° 18′ 12.6395″ 5.39 57.11 G0V 0.95 5817 102 4 [64]
テーブルさん座パイ星 テーブルさん座  05h 37m 09.8868s −80° 20′ 08.8346″ 5.67 59.65 G0V 1.11 6013 34 3 [62][31]
LHS 1678 A ちょうこくぐ座  04h 32m 42.6349s −39° 47′ 12.1500″ 12.482 64.79 M2V 0.345 3490 40 - 90 3 [65]
GJ 3293 エリダヌス座  04h 28m 35.7191s −25° 10′ 09.2979″ 11.962 65.91 M2.5 0.420 3466 4 [66][67]
HD 104067 からす座  11h 59m 10.0088s −20° 21′ 13.6121″ 7.921 66.36 K2V 0.818 4942 48 2 (1) [68][69]
HD 215152 みずがめ座  22h 43m 21.3028s −06° 24′ 02.9530″ 8.13 70.39 K3V 0.756 4803 52.1 4 [70][71]
HD 164922 ヘルクレス座  18h 02m 30.8623s +26° 18′ 46.8050″ 6.99 71.69 G9V 0.874 5293 95.8 4 [72][73]
HD 63433 ふたご座  07h 49m 55.0607s +27° 21′ 47.4574″ 6.91 73.035 G5V 0.99 5688 4.14 3 [74]
HIP 57274 おおぐま座  11h 44m 40.9643s +30° 57′ 33.4481″ 8.96 84.4 K4V 0.73 4640 78.7 3 [75]
HD 142 A ほうおう座  00h 06m 19.1753s −49° 04′ 30.6712″ 5.76 85.39 F7V 1.25 6338 25 3 [76][77]
HD 39194 テーブルさん座  05h 44m 31.9180s −70° 08′ 36.8578″ 8.075 86.23 K0V 0.67 5205 100 3 [78]
LP 791-18 コップ座  11h 02m 45.9546s −16° 24′ 22.2882″ 16.9 86.92 M6V 0.139 2960 5 3 [79][80]
HD 181433 くじゃく座  19h 25m 09.5667s −66° 28′ 07.6770″ 8.38 88.03 K3III-IV 0.84 4909 74 3 [81][82]
HD 134606 ふうちょう座  15h 15m 15.0446s −70° 31′ 10.6449″ 6.854 87.44 G6IV 1.046 5576 73 5 [83]
HD 158259 りゅう座  17h 25m 24.0553s +52° 47′ 26.4699″ 6.47 88.11 G0 1.08 5 (1) [84]
HD 82943 うみへび座  09h 34m 50.7353s −12° 07′ 46.3692″ 6.53 90.31 F9VFe+0.5 1.14 5944 31 2 (1) [81][85]
GJ 3138 くじら座  02h 09m 10.9012s −16° 20′ 22.5293″ 10.877 92.89 M0 0.681 3717 3 [67]
GJ 9827 うお座  23h 27m 04.8377s −01° 17′ 10.5827″ 10.10 96.71 K6V 0.606 4305 60.5 3 [86][87]
K2-239 ろくぶんぎ座  10h 42m 22.6343s +04° 26′ 28.8859″ 14.55 101.51 M3V 0.40 3420 3 [88]
TOI-700 かじき座  06h 28m 23.2285s −65° 34′ 45.5204″ 13.076 101.5 M2V 0.415 3459 >15 4 [89][90]
HR 858 A ろ座  02h 51m 56.2462s −30° 48′ 52.2623″ 6.382 104.3 F6V 1.145 6201 22.8 3 [91]
HD 37124 おうし座  05h 37m 02.4866s +20° 43′ 50.8329″ 7.68 103.4 G4IV-V 0.81 5763 118 3 [62][92]
HD 20781 ろ座  03h 20m 02.9429s −28° 47′ 01.7905″ 8.44 117.3 G9.5V 0.70 5256 4 [93]
ケプラー444A こと座  19h 19m 00.5489s +41° 38′ 04.5824″ 8.86 119.22 K0V 0.754 5046 110 5 [94][95]
HD 141399 うしかい座  15h 46m 53.8132s +46° 59′ 10.5432″ 7.20 120.85 K0 1.09 5602 4 [96][97]
ケプラー42 はくちょう座  19h 28m 52.5689s +44° 37′ 08.9898″ 16.06 (R) 130.8 M4V 0.144 3269 3 [98]
HD 31527 うさぎ座  04h 55m 38.3826s −23° 14′ 30.7616″ 7.484 125.06 G2V 0.96 5898 3 [99]
HD 10180 みずへび座  01h 37m 53.5772s −60° 30′ 41.4821″ 7.32 127.1 G1V 1.062 5911 73 6 (3) [100][101][102][103]
TOI-174A レチクル座  03h 41m 50.3988s −62° 46′ 01.4772″ 9.72 127.5 K4V 0.67 4684 5 [104]
HR 8799 ペガスス座  23h 07m 28.7157s +21° 08′ 03.3108″ 5.953 133.3 F0+VkA5mA5 1.47 7430 0.3 4 [105][106]
HD 27894 レチクル座  04h 20m 47.0461s −59° 24′ 39.0246″ 9.42 142.5 K2V 0.83 4923 69 3 [81][107]
HD 93385 ほ座  10h 46m 15.1159s −41° 27′ 51.7287″ 7.486 140.9 G2/3V 1.04 5977 33 3 [108]
K2-3 しし座  11h 29m 20.3917s −01° 27′ 17.2817″ 12.17 143.4 M1V 0.549 3844 69 3 [109]
HD 204313 やぎ座  21h 28m 12.2061s −21° 43′ 34.5182″ 8.02 156.97 G5V 1.06 5783 43 3 [81][77]
HD 3167 うお座  00h 34m 57.5242s +04° 22′ 53.2841″ 8.97 154.3 K0V 0.837 5261 78 4 [110]
TOI-500 とも座  07h 06m 13.9753s −47° 35′ 13.8721″ 10.59 154.63 K6 4 [111]
HIP 14810 おひつじ座  03h 11m 14.2302s +21° 05′ 50.4940″ 8.50 163.75 G6V 0.98 5535 87 3 [62][112]
HD 133131 A/B てんびん座  15h 03m 35.0865s −27° 50′ 27.5520″ 8.40 167.84 G2V / G2V 0.95 5799 63 3 [113][注 1]
HD 191939 りゅう座  20h 08m 05.7551s +66° 51′ 02.0766″ 8.97 174.45 G9V 0.81 5348 70 6 [114]
HD 109271 A おとめ座  12h 33m 35.5546s −11° 37′ 18.7289″ 8.05 182.13 G3/5V 1.047 5783 73 2 (1) [115]
HD 125612 A おとめ座  14h 20m 53.5177s −17° 28′ 53.4897″ 8.32 188.64 G3V 1.09 5818 31 3 [81][116]
K2-136A おうし座  04h 29m 38.9939s +22° 52′ 57.7935″ 11.20 192.06 K5.5V 0.71 4364 6.25-7.50 3 [117]
HD 184010 こぎつね座  19h 31m 21.6214s +26° 37′ 01.8171″ 5.893 200.17 K0III-IV 1.35 4971 27.6 3 [118]
HD 38677 オリオン座  05h 47m 06.2666s −10° 37′ 48.8272″ 7.98 204.17 F8V 1.21 6196 20.1 4 [119]
TOI-178 ちょうこくしつ座  00h 29m 12.3029s −30° 27′ 13.4669″ 11.95 204.87 K7V 0.650 4316 71 6 [120]
[[]] °

脚注

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[脚注の使い方]

注釈

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  1. ^ HD 133131 系は HD 133131 A と HD 133131 B の2つの恒星から成る連星系であり、前者には2つの惑星、後者には1つの惑星が周囲を公転していることが知られている。ここでは HD 133131 系全体の総数として惑星を3個持つものとして扱う。

出典

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  1. ^ a b 井田茂、田村元秀、生駒大洋、関根康人 編『系外惑星の事典』朝倉書店、2016年9月15日、欧文索引 - M頁。ISBN 978-4-254-15021-6。 
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