川崎市青少年科学館紀要 ,（26）：5-10,Mar.2016ࡁ ࡾࢇᗙὶᫍ⩌ࡢணሗ◊✲బ⸨ᖿဢ *Research of a forecast of Camelopardalids meteor shower
Mikiya Sato*࢖ࣥࢺࣟࢲࢡࢩࣙࣥ ᮏ◊✲ࡢ┠ⓗࡇࡢࡼ࠺࡟ࠊඛ⾜◊✲࡟ࡼࡗ࡚ࡍ࡛࡟ணሗࡉࢀ࡚࠸ࡓ ࡁࡾࢇᗙὶᫍ⩌࡜ࡑࡢẕኳయ ࡁࡾࢇᗙὶᫍ⩌ (Camelopardalids) ࡣࠊ2014 ᖺ௨๓࡟ࡁࡾࢇᗙὶᫍ⩌࡛ࡣ࠶ࡿࡀࠊὶᫍ⩌ฟ⌧ࡢ㉳ᅉ࡜࡞ࡿࢲࡣࠊࡲ࡜ࡲࡗࡓฟ⌧ࡀグ㘓ࡉࢀ࡚࠸࡞࠿ࡗࡓ᪂ࡋ࠸ὶᫍࢫࢺ࣭ࢺࣞ࢖ࣝࢆᙧᡂࡍࡿࢲࢫࢺࡢᨺฟ᫬ᮇࡣࠊẕኳయ⩌࡛࠶ࡿࠋIAU (ᅜ㝿ኳᩥᏛ㐃ྜ) ࡢ☜ᐃὶᫍ⩌࡟ࡣྵࡲࡢⓎぢ๓࡛࠶ࡗࡓࠋ୍⯡ⓗ࡟ẕኳయⓎぢ๓ࡢ㌶㐨࡟ࡘ࠸ࢀ࡚࠸࡞࠸ࡀࠊ࣮࣡࢟ࣥࢢࣜࢫࢺ࡟Ⓩ㘓ࡉࢀ࡚࠾ࡾࠊὶ࡚ࡣࠊ᫬ᮇࡀ㐳ࡿ࡟ࡘࢀ࡚ㄗᕪࡀቑຍࡋࠊ୙☜ᐃせ⣲ࡀᫍ⩌␒ྕࡢ IAU No.451 ࡜ࠊ␎ྕࡢ CAM ࡀỴᐃࡋ࡚࠸ࡿ኱ࡁࡃ࡞ࡿࡓࡵࠊࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬࡟ࡼࡿࢲࢫࢺ࣭

ὶᫍ⩌࡛࠶ࡿࠋ

ࢺࣞ࢖ࣝࡢ఩⨨࡟ࡶ୙☜ᐃせ⣲ࡀྵࡲࢀࡿྍ⬟ᛶࡀ㧗ࡃ ὶᫍ⩌ࡢẕኳయࡣࠊࣜࢽ࢔࣮ᙟᫍ (209P/LINEAR) ࡛࡞ࡿࠋᐇ㝿࡟ඛ⾜◊✲ 3 ⪅࡟ࡼࡿணሗࡣࠊᚤጁ࡟ᕪ㐪ࡀ࠶ࡿࠋࡇࡢᙟᫍࡣࠊ2004 ᖺ 2 ᭶ 3 ᪥࡟ࠊLINEAR ࣉࣟࢪ⏕ࡌ࡚࠸ࡿࠋࡑࡇ࡛ࠊูࡢ㌶㐨せ⣲ࢆ⏝࠸࡚ 2014 ᖺࡢࢲ࢙ࢡࢺ (Lincoln Laboratory Near-Earth Asteroid ResearchProject) ࡟ࡼࡾⓎぢࡉࢀࡓࠋࡇࡢᙟᫍࡢ㌶㐨せ⣲ࢆ⾲ 1⾲ 㻝㻚㻌 䝸䝙䜰䞊ᙟᫍ䠄㻞㻜㻥㻼䠅䛾㌶㐨せ⣲㻚㻌࡟♧ࡍࠋබ㌿࿘ᮇࡀ⣙ 5 ᖺ࡛ࠊᮌᫍ᪘ࡢ▷࿘ᮇᙟᫍ࡟ศ
㢮ࡉࢀࡿࠋ㏆᪥Ⅼ㊥㞳ࡀ࠾ࡼࡑ 0.97 au ࡛࠶ࡾࠊ㏆᪥Ⅼ௜㏆࡛ᆅ⌫㌶㐨࡟᥋㏆ࡍࡿ㌶㐨ࢆᣢࡘࠋ2014 ᖺࡢᅇᖐ᫬ࡣࠊ5 ᭶ 6 ᪥࡟㏆᪥Ⅼࢆ㏻㐣ࡋᆅ⌫࡟ࡶ᥋㏆ࡋ࡚⣙ 12 ➼⣭࡜ẚ㍑ⓗ᫂ࡿࡃほࡉࢀࡓ (ICQ, 2014)ࠋ

 ඛ⾜◊✲

㡯┠㻌

ྛ್㻌

㏆᪥Ⅼ㏻㐣㻌 㻔㼀㻕㻌㻞㻜㻝㻠㻌㻹㼍㼥㻌㻢㻚㻟㻞㻠㻝㻥㻌㏆᪥Ⅼ㊥㞳㻌 㻔㼝㻕㻌㻭㼁㻌㻜㻚㻥㻢㻥㻠㻡㻤㻜㻌㞳ᚰ⋡㻌 㻔㼑㻕㻌㻜㻚㻢㻣㻞㻡㻤㻟㻥㻌㏆᪥Ⅼᘬᩘ㻌 㻔䃨㻕㻌 䜪㻌㻝㻡㻞㻚㻟㻥㻟㻝㻡㻌

᪼஺Ⅼ㯤⤒㻌 㻔䃈㻕㻌 䜪㻌㻢㻞㻚㻤㻞㻠㻠㻣㻌㌶㐨ഴᩳ㻌 㻔㼕㻕㻌 䜪㻌㻞㻝㻚㻞㻠㻟㻠㻞㻌 ẕኳయࡢ㌶㐨ࡀᆅ⌫㌶㐨࡟᥋㏆ࡍࡿࡶࡢ࡛࠶ࡗࡓࡓࡵࠊ

Kinoshita (2012) ࡼࡾⓎぢ࠿ࡽ㛫ࡶ࡞ࡃࡋ࡚ࡍࡄ࡟ὶᫍ⩌ࡢฟ⌧ࡀᮇᚅࡉࢀ࡚
࠸ࡓࠋ࠸ࡕ᪩ࡃ Lyytinen Ặࡣࠊ1818 ᖺ௨㝆࡟ẕኳయ࠿ࡽࢫࢺ࣭ࢺࣞ࢖ࣝࡢ఩⨨ࢆࡉࡽ࡟ࢩ࣑࣮ࣗࣞࢩࣙࣥࡍࡿࡇ

ᨺฟࡉࢀࡓࢲࢫࢺࡀᙧᡂࡍࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡀ 2014࡜ࡣࠊணሗ඲యࡢ᝟ሗ㔞ࢆቑࡸࡍࡓࡵ࡟ᚲせ࡞≧ἣ࡛࠶ᖺ࡟᥋㏆ࡍࡿࡇ࡜ࢆぢฟࡋ࡚࠸ࡿ (Jenniskens 2006)ࠋࡉ

ࡗࡓࠋࡽ࡟ࠊࣟࢩ࢔ࡢ Maslov Ặࡀ 2010 ᖺ࡟ࠊࣇࣛࣥࢫࡢࡲࡓࠊⓎぢ๓ࡢẕኳయ࡛ࡣࠊࡑࡢᙟᫍάືᗘ⮬యࡀ୙

Vaubaillon Ặࡀ 2012 ᖺ࡟ࠊࡑࢀࡒࢀࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ࡛᫂࠶ࡿࡓࡵࠊࢲࢫࢺࡢᨺฟ㔞ࡣᮍ☜ᐃࡢ≧ἣ࡟࡞ࡿࠋ᥋㏆࡟ࡼࡿ 2014 ᖺࡢὶᫍ⩌ࡢฟ⌧ࢆணሗࡋ࡚࠸ࡿࠋࡇࢀ୍᪉࡛ࠊඛ⾜◊✲ࡢணሗฟ⌧ᩘࡣ኱ኚከࡃࠊ୍⯡ᒙࡀ኱ࡽࢆ⾲ 2 ࡟ࡲ࡜ࡵࡓࠋࡁࡃὀ┠ࡍࡿࣞ࣋ࣝ࡟㐩ࡋ࡚࠸ࡓࠋࡇࡢࡼ࠺࡞≧ἣୗ࡛

Lyytinen Ặ࡟ࡼࡿணሗ࡛ࡣࠊὶᫍ⩌ࡢฟ⌧つᶍ࡟ࡘ࠸࡚ࡣゝཬࡋ࡚࠸࡞࠿ࡗࡓࡀࠊMaslov Ặ࡜ Vaubaillon Ặࡣࠊࡑࢀࡒࢀࡢ◊✲࠿ࡽࠊZHR (ኳ㡬ಟṇ 1 ᫬㛫ὶᫍᩘ) ࡛ᩘ࠶ࡗࡓࡓࡵࠊࡉࡽ࡟ฟ⌧ᩘࡢணሗ᝟ሗࢆቑࡸࡍࡇ࡜ࡣࠊ᭷⏝࡛࠶ࡿ࡜ุ᩿ࡉࢀࡓࠋ
௨ୖ࡟ࡼࡾࠊඛ⾜◊✲࡟ࡼࡿணሗࡣ࠶ࡗࡓࡶࡢࡢࠊࣜⓒ ࣞ ࣋ ࣝ ࡢ ኱ ฟ ⌧ ࡢ ண ሗ ࢆ ሗ ࿌ ࡋ ࡓ (Maslov, 2010;ࢽ࢔࣮ᙟᫍ࠿ࡽࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࢆࢩ࣑࣮ࣗࣞࢩࣙࣥVaubaillon, 2012)ࠋ

ィ⟬ࡋࠊ2014 ᖺࡢࡁࡾࢇᗙὶᫍ⩌ࡢணሗ࡟ᑐࡍࡿ᝟ሗ㔞⾲ 2. ඛ⾜◊✲ࡢணሗᴫ␎.

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ᨺฟᖺ

6᫬59ศ
7᫬15ศ
6᫬33ศ㹼7᫬49ศ
7᫬18ศ
7᫬55ศ
7᫬40ศ๓ᚋ

ண᝿=+5ฟ඾190319091818㹼1914
1898㹼1919
1763㹼1783

᭱ࡶ㔜せ᭱ࡶ㔜せ1)

200㹼300
50㹼1502)

1803㹼1924100㹼4003)

1) Jenniskens 2006, 2) Maslov 2010, 3) Vaubaillon 2012㸨ᕝᓮᕷ㟷ᑡᖺ⛉Ꮫ㤋 㸦࠿ࢃࡉࡁᐂ࡜⥳ࡢ⛉Ꮫ㤋㸧 * Kawasaki Municipal Science Museum
そら＊川崎市青少年科学館（かわさき宙と緑の科学館）
Kawasaki Municipal Science Museum-1−5−ࢆᅗ 1 ࡟♧ࡋࡓࠋࢆቑࡸࡍࡇ࡜ࡀ㔜せ࡛࠶ࡿ࡜⪃࠼ࠊࡇࢀࢆᮏ◊✲ࡢ➨ 1ࡢ┠ⓗ࡜タᐃࡋࡓࠋࡲࡓࠊฟ⌧ᚋ࡟ᐇ㝿ࡢほ⤖ᯝ࡜ẚ㍑ࡋࠊணሗࡢጇᙜᛶ࡟ࡘ࠸࡚⪃ᐹࢆຍ࠼ࡿࡇ࡜ࢆ➨ 2 ࡢ┠ⓗ࡜ࡋࡓࠋ◊✲ᡭἲ ẕኳయࡢ㌶㐨せ⣲ ẕኳయࡢ㌶㐨せ⣲࡟ࡘ࠸࡚ࠊ1898 ᖺࡢᅇᖐ௨㝆ࡢࡶࡢࡣࠊᮌୗ୍⏨Ặ࡟ࡼࡗ࡚ィ⟬ࡉࢀࡓࡶࡢࢆ౑⏝ࡋࡓ(Kinoshita, 2012)ࠋࡑࢀ௨๓ࡢᅇᖐ᫬ࡢࡶࡢ࡟ࡘ࠸࡚ࡣࠊ
ᮌୗẶ࡟ࡼࡿ 1898 ᖺࡢᅇᖐ᫬ࡢ㌶㐨せ⣲ࢆࡶ࡜࡟ࠊᙜ᪉ࡀᩘ್✚ศ࡟ࡼࡾࡉ࠿ࡢࡰࡗ࡚ィ⟬ࡋࠊࡇࢀࢆ౑⏝ࡋࡓࠋ
ᅗ 1. 2014 ᖺ࡟ᆅ⌫࡜᥋㏆ࡍࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝศᕸ.

 ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬ ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬࡟ࡣࠊAsher(2000) ࡟ࡼࡾぢฟࡉࢀࠊࡲࡓ Sato (2003) ࡟ࡼࡗ࡚ᮌᫍࡇࢀࡽࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡣࠊᆅ⌫࡜ 0.001 au ௨ෆ࡟᪘▷࿘ᮇᙟᫍ࡟㐺⏝ࡋࡓᡭἲࢆ⏝࠸ࡓࠋࡇࡢ᪉ἲࡣࠊ᭱

᥋㏆ࡋ࡚࠾ࡾࠊὶᫍ⩌ࡢฟ⌧࡟ᐤ୚ࡍࡿྍ⬟ᛶࡀ㧗࠸ࡶࡶ༢⣧࡞ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࣔࢹࣝࡢᡭἲ࡛࠶ࡿࠋࡍ࡞ࢃ

ࡢ࡛࠶ࡿࠋࢲࢫࢺࡀᙟᫍ࠿ࡽᨺฟࡋࡓ㏿ᗘࡣࠊ2m/s ௨ෆࡕࠊẕኳయᅇᖐࡢ㏆᪥Ⅼ㏻㐣᫬࡟ࢲࢫࢺ (ὶᫍయ) ࢆᨺ࡛࠶ࡾࠊ୍⯡ⓗ࡟ࡣ኱ࡁ࡞⢏ࡢࢲࢫࢺࡀከࡃࠊ᫂ࡿ࠸ὶ

ฟࡋࠊࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ఩⨨ࡢࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬ᫍࡀྵࡲࢀࡿࡇ࡜ࡶ᝿ᐃࡉࢀࡿ≧ἣ࡛࠶ࡗࡓࠋ᥋㏆᫬้ࢆᐇ᪋ࡋࡓࠋࢲࢫࢺࡢᨺฟ᪉ྥࡣࠊ㏆᪥Ⅼ࡟࠾ࡅࡿẕኳࡣࠊ᪥ᮏ᫬ࡢ 5 ᭶ 24 ᪥ 6 ᫬ 35 ศ㹼7 ᫬ 25 ศ (ୡ⏺᫬) ࡛యࡢ㐠ື᪉ྥཬࡧࡑࡢ཯ᑐ᪉ྥ࡜ࡋࡓࠋᦤືィ⟬࡟ࡣࠊ8࠶ࡾࠊࡇࡢ᫬㛫ᖏࢆ୰ᚰ࡟ὶᫍ⩌ࡢฟ⌧ࡀᮇᚅࡉࢀࡿ≧ᝨᫍࠊෞ⋤ᫍࠊ3 ᑠᝨᫍ (ࢣࣞࢫ࣭ࣃࣛࢫ࣭࣋ࢫࢱ)ࠊ᭶

ἣ࡛࠶ࡿࡇ࡜ࡀุ᫂ࡋࡓࠋඛ⾜◊✲ (⾲ 1) ࡜ẚ㍑ࡍࡿ࡜ࠊࡢᘬຊࢆ⪃៖ࡋࡓࠋ࡞࠾ࠊኴ㝧ගᅽࡢᙳ㡪ࡣ⪃៖ࡋ࡚࠸1 ᫬㛫⛬ᗘࡢᕪࡀ࠶ࡿࡀࠊ࠾ࡼࡑࡢഴྥࡣ୍⮴ࡋࡓࠋ࡞࡞࠸ࠋࡲࡓࠊẕኳయ࠿ࡽࡢࢲࢫࢺࡢᨺฟ᫬ᮇࡣࠊ1803 ᖺ࠾᪥ᮏᅜෆ࡟࠾࠸࡚ࡣࠊᴟ኱ࡢ᫬㛫ᖏࡀ᫨㛫࡟࠶ࡓࡾࠊ

㹼2009 ᖺ࡟タᐃࡋࡓࠋࡉࡽ࡟ྂ࠸᫬ᮇ࡟ᨺฟࡉࢀࡓࢲࢫ

ගᏛⓗ࡞ほࡣᅔ㞴࡞≧ἣ࡛࠶ࡗࡓࠋࢺࡢᙳ㡪ࢆཷࡅࡿࡇ࡜ࡶ⪃࠼ࡽࢀࡿࡀࠊẕኳయࡢ㌶㐨ࡢ୙☜ᐃࡉࡀ኱ࡁࡃ࡞ࡿࡇ࡜ࠊ୍⯡ⓗ࡟᪩࠸᫬ᮇ࡟ฟࡉࢀ ฟ⌧つᶍࡢ᥎ࡓࢲࢫࢺ࣭ࢺࣞ࢖ࣝ࡯࡝ࢲࢫࢺᐦᗘࡀᑠࡉࡃ࡞ࡾࠊὶᫍࡁࡾࢇᗙὶᫍ⩌ࡣࠊࡇࢀࡲ࡛࡟ࡲ࡜ࡲࡗࡓฟ⌧グ㘓ࡀ⩌ฟ⌧࡬ࡢ㛵୚ࡀᑠࡉࡃ࡞ࡗ࡚࠸ࡃࡇ࡜ࡢ 2 Ⅼࡼࡾࠊࡇ࡞࠸ࡓࡵࠊ㐣ཤࡢ≧ἣ࡜ẚ㍑ࡋ࡚ฟ⌧つᶍࢆ᥎ࡢ⠊ᅖ࡛ጇᙜ࡜ุ᩿ࡋࡓࠋ࡜ࡣ୙ྍ⬟࡛࠶ࡗࡓࠋࡑࡇ࡛ࠊ௒ᅇࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡍࡿࡇศᕸ≧ἣ࡜ఝࡓࢣ࣮ࢫࠊࡍ࡞ࢃࡕࠊẕኳయࡀᮌᫍ᪘▷࿘ ฟ⌧つᶍࡢ᥎ ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࣔࢹࣝ࡟ࡼࡿฟ⌧つᶍ࡟ࡼࡿண

ᮇᙟ࡛ᫍ࠶ࡾࠊከࡃࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡀࡲ࡜ࡲࡗ࡚ᆅࡣࠊ

⌫࡜᥋㏆ࡋࠊ࠿ࡘࢲࢫࢺࡢᨺฟ㏿ᗘࡀẚ㍑ⓗᑠࡉ࠸≧ἣ⌧ᅾ࡟࠾࠸࡚ࡶࡲࡔ☜❧ࡉࢀ࡚࠸࡞࠸≧ἣ࡛࠶ࡿࠋ➹⪅ࢆ᥈⣴ࡋࡓࠋࡑࡢ⤖ᯝࠊ10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ (Octoberࡣࠊ㐣ཤࡢฟ⌧࡟࠾ࡅࡿ≧ἣ࡜ẚ㍑ࡍࡿࡇ࡜࡟ࡼࡗ࡚ฟ

Draconids) ࡟࠾ࡅࡿ 1946 ᖺࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢศᕸࡀࠊ⌧つᶍࢆணࡍࡿᡭἲࢆࡇࢀࡲ࡛࡜ࡗ࡚ࡁࡓࡀࠊࡁࡾࢇ

ẚ㍑ⓗఝ࡚࠸ࡿ≧ἣ࡟࠶ࡿࡇ࡜ࡀุ᫂ࡋࡓࠋ10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢሙྜࡣࠊ2014 ᖺࡀึࡵ࡚ࡢฟ⌧࡜࡞ࡿὶᫍ⩌ᗙὶᫍ⩌ࡢẕኳయࡣࠊබ㌿࿘ᮇࡀ⣙ 6.5 ᖺࡢᮌᫍ᪘▷࿘࡛࠶ࡾࠊࡇࡢᡭἲࢆ㐺⏝ࡍࡿࡇ࡜ࡀ࡛ࡁ࡞࠸ࠋࡑࡇ࡛ࠊᮇ ᙟ ᫍ ࡛ ࠶ ࡿ ࢪ ࣕ ࢥ ࣅ ࢽ ࣭ ࢳ ࣥ ࢼ ࣮ ᙟ ᫍ (21P/ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢศᕸࡀఝࡓ≧ἣ࡟࠶ࡿูࡢὶᫍ⩌ࢆ

Giacobini-Zinner) ࡛࠶ࡿࠋ10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢ 1946᥈⣴ࡋࠊࡇࡢࢣ࣮ࢫ࡜ẚ㍑ࡍࡿࡇ࡜࡛ࠊฟ⌧つᶍࢆணᖺ࡟᥋㏆ࡍࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝ࡟ࡘ࠸࡚ࠊ➹⪅ࡀィ⟬ࡋࡍࡿࡇ࡜࡜ࡋࡓࠋ

ࡓ≧ἣࢆ⾲ 4 ࡟ࡲ࡜ࡵࡿࠋࡇࡢ⤖ᯝ࠿ࡽࠊ1946 ᖺࡢ 10᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢฟ⌧࡟ࡣࠊ1900 ᖺ㹼1940 ᖺ࡟ẕኳయ⤖ᯝ࠿ࡽᨺฟࡉࢀࡓࢲࢫࢺࡀᙧᡂࡍࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡀ㛵  ᖺࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢศᕸ୚ࡋࡓ࡜᥎ ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࣔࢹࣝ࡟ࡼࡿࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬ࡢ㊥㞳࡟᥋㏆ࡋ࡚࠾ࡾࠊࡑࡢ᥋㏆᫬้ࡣࠊ1946 ᖺ 10 ᭶ࢆ⾜ࡗࡓ⤖ᯝࠊ1803 ᖺ㹼1909 ᖺ࡟ẕኳయࡀᅇᖐࡋࡓ㝿࡟10 ᪥ 3 ᫬ 45 ศ㹼4 ᫬ 2 ศ (ୡ⏺᫬) ࡟㞟୰ࡋ࡚࠸ࡿࠋᙜ

ࡉࢀࡿࠋࡇࢀࡽࡣࠊᆅ⌫࡜ 0.0012 au ௨ෆࢲࢫࢺࡀᨺฟࡉࢀࠊࡑࡢᚋᙧᡂࡍࡿ 22 ᮏࡢࢲࢫࢺ࣭ࢺࣞ᫬ࡢฟ⌧≧ἣࡣࠊ኱ὶᫍᔒ࡜⾲⌧ࡉࢀࡿࡼ࠺࡞≧ἣ࡛ࠊ

࢖ࣝࡀࠊ2014 ᖺ࡟ᆅ⌫࡜᥋㏆ࡍࡿࡇ࡜ࡀุ᫂ࡋࡓࠋࡇࢀ

ZHR ࡣ ࠊ 90,000 㹼 15,000 ࡟ 㐩 ࡋ ࡓ ࡜ ⪃ ࠼ ࡽ ࢀ ࡚ ࠸ ࡿࡽࡢྛࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ≧ἣࢆ⾲ 3 ࡟ࡲ࡜ࡵࡓࠋࡲࡓ(Jenniskens, 1995)ࠋࡇࢀࢆ௒ᅇࡢฟ⌧つᶍ᥎㯤㐨㠃 (ᆅ⌫㌶㐨㠃) ࡟࠾ࡅࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢศᕸ

ࡋ࡚⪃࠼ࡿࡇ࡜࡟ࡋࡓࠋ
-2−6−ࡢᇶ‽࡜⾲ 3. ࡁࡾࢇᗙὶᫍ⩌ࡢ 2014 ᖺ࡟࠾ࡅࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ≧ἣ.
ᨺฟᖺ
1803
1808
1813
1818
1823
1828
1833
1838
1843
1848
1853
1858
1863
1868
1873
1878
1883
1888
1893
1898
1903
1909

ᴟ኱ணሗ᫬้
᭶᪥
᫬้
(UT)
(UT)
2014/05/24.28
06:36
2014/05/24.27
06:35
2014/05/24.27
06:35
2014/05/24.27
06:35
2014/05/24.27
06:35
2014/05/24.28
06:36
2014/05/24.28
06:36
2014/05/24.28
06:36
2014/05/24.28
06:36
2014/05/24.28
06:37
2014/05/24.28
06:38
2014/05/24.28
06:39
2014/05/24.28
06:40
2014/05/24.28
06:41
2014/05/24.28
06:44
2014/05/24.28
06:47
2014/05/24.29
06:51
2014/05/24.29
06:54
2014/05/24.29
06:57
2014/05/24.29
07:03
2014/05/24.30
07:10
2014/05/24.31
07:25

ኴ㝧㯤⤒
(2000.0)
62.83362.83262.83262.83262.83262.83262.83362.83362.83362.83362.83462.83562.83562.83662.83862.84062.84362.84562.84762.85162.85662.866᥋㏆㊥㞳(au)+0.00099+0.0010+0.0010+0.0010+0.0010+0.0010+0.0010+0.00099+0.00097+0.00097+0.00096+0.00095+0.00093+0.00090+0.00086+0.00080+0.00068+0.00058+0.00044+0.00025-0.000045-0.00061

fM

ᨺฟ
㏿ᗘ
(m/s)
+0.11
+0.09
+0.08
+0.08
+0.08
+0.09
+0.10
+0.11
+0.13
+0.14
+0.15
+0.16
+0.18
+0.21
+0.26
+0.35
+0.50
+0.57
+0.67
+0.81
+1.04
+1.51

0.015
0.012
0.012
0.011
0.011
0.012
0.014
0.016
0.019
0.020
0.021
0.022
0.025
0.030
0.035
0.046
0.067
0.070
0.082
0.097
0.12
0.15

ᨺᑕⅬ఩⨨㉥⤒㉥⦋㻔䜪㻕㻔䜪㻕
122.66+79.19122.66+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.65+79.19122.66+79.19122.66+79.19122.67+79.18122.70+79.18122.72+79.17122.74+79.17122.78+79.16122.83+79.14122.93+79.11

Vg(km/s)
16.18
16.18
16.18
16.18
16.18
16.18
16.18
16.19
16.19
16.19
16.19
16.19
16.19
16.19
16.19
16.19
16.19
16.19
16.20
16.20
16.20
16.21

ฟ⌧つᶍ࡟᭱ࡶ㛵୚ࡍࡿࡢࡣࠊࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢࢲ

ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡣࠊ1900 ᖺ㹼1940 ᖺ࡟ᨺฟࡋࡓ 7 ᮏ࡛ࢫࢺࡢᐦᗘ (⃰ᗘ) ࡛࠶ࡿࠋಶࠎࡢὶᫍ⩌࡟࠾࠸࡚ࠊࢲ࠶ࡿࠋᮏ᮶࡞ࡽࡤಶࠎࡢᴟ኱᫬้࡜ࠊᴟ኱⥅⥆᫬㛫ࢆ⪃ࢫࢺࡢᐦᗘࡢᣦᶆ࡜࡞ࡿ್࡟ࠕfM ್ࠖࡀ࠶ࡿࠋࡇࢀࡣࠊ៖ࡋ࡞ࡅࢀࡤ࡞ࡽ࡞࠸ࡀࠊᴟ኱᫬้ࡢᕪࡢ᭱኱ࡀ 17 ศ㛫ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢᘬࡁᘏࡤࡉࢀࡓ⛬ᗘࢆ⾲ࡍᩘ್࡛࠶࡟㞟୰ࡋ࡚࠸ࡿࡓࡵࠊ༢⣧࡟ fM ್ࢆຍ⟬ࡍࡿࡇ࡜࡛ࢲ

ࡿࠋࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡣࠊ୍⯡ⓗ࡟බ㌿ᅇᩘ (ᅇᖐᩘ) ࡀࢫࢺ࣭ࢺࣞ࢖ࣝ඲యࡢᐦᗘࢆồࡵࡓࠋࡇࡢ್ࡣࠊ2.67 ࡜ከࡃ࡞ࡿ࡟ࡘࢀ࡚ࠊᘬࡁᘏࡤࡉࢀ࡚ᐦᗘࡀᑠࡉࡃ࡞ࡗ࡚

࡞ࡗࡓࠋ࠸ࡃࠋ୍᪉࡛ࠊྛᝨᫍ࠿ࡽཷࡅࡿᦤື࡟ࡼࡗ࡚ࠊಶࠎ࡟ ḟ࡟ࡁࡾࢇᗙὶᫍ⩌࡟ࡘ࠸࡚ࡶ᳨ウࡋࡓࠋᮏ◊✲࠿ࡽ㐍໬ࡋࠊࡑࡢᐦᗘࡀኚ໬ࡋ࡚࠸ࡃࠋfM ್ࡣࠊᦤືࢆཷࡅồࡵࡽࢀࡓࡁࡾࢇᗙὶᫍ⩌ࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡣࠊ22 ᮏ࡞࠸࡜௬ᐃࡋࡓ㝿ࡢ 1 ᅇᖐ┠ (1 බ㌿┠) ࡢࢲࢫࢺᐦᗘ

ࡀ 2014 ᖺ 5 ᭶ 24 ᪥ 7 ᫬๓ᚋࡢ 1 ᫬㛫௨ෆ࡟᥋㏆ࡍࡿࠋ࡟ᑐࡍࡿᐇ㝿ࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢᐦᗘࡢẚ࡛⾲ࡉࢀࡿࠋ᥋㏆᫬้ࡢᕪࡣࠊⱝᖸ኱ࡁ࠸ࡀࠊ᝿ᐃࡉࢀࡿ⥅⥆᫬㛫ࡀᮏ◊✲࡛ࡣࠊᘧ 1 ࡟ࡼࡗ࡚ồࡵࡓࠋ୙࡛᫂࠶ࡿࡓࡵࠊ௒ᅇ࡟ࡘ࠸࡚ࡣࡸࡣࡾ fM ್ࢆ༢⣧࡟ຍ⟬ࡋ࡚ᐦᗘࢆồࡵࡿࡇ࡜࡟ࡋࡓࠋࡑࡢ್ࡣࠊ0.91 ࡜ồ

fM = Δt0 㸭 Δt       ࡲࡗࡓࠋࡋࡓࡀࡗ࡚ࠊfM ್࡟ࡼࡿࢲࢫࢺࡢ⃰ᗘࢆẚ㍑ࡍ

ᘧ1ࡿ࡜ࠊ2014 ᖺࡢࡁࡾࢇᗙὶᫍ⩌ࡣࠊ1946 ᖺࡢ 10 ᭶ࡾࡹ
ࡓࡔࡋࠊΔt ࡣࠊࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢᙜヱᚤᑠ༊㛫ࡀ㯤࠺ᗙὶᫍ⩌࡟ᑐࡋ࡚ࠊ⣙ 3 ศࡢ 1 (34.0㸣) ࡜ࡢ⤖ᯝ࡜࡞㐨㠃ࢆᶓ᩿ࡍࡿ᫬㛫࡛ࠊΔt0 ࡣࠊྠ୍ᚤᑠ༊㛫ࡀᦤືࢆࡗࡓࠋཷࡅ࡞࠿ࡗࡓ࡜௬ᐃࡋࡓ㝿࡟୍ᅇᖐ┠࡟㯤㐨㠃ࢆᶓ᩿ࡍ ⥆࠸࡚ࠊẕኳయࡢάືᗘ࡟ࡘ࠸࡚ࡢ᳨ウࢆ⾜ࡗࡓࠋྠࡿ᫬㛫࡛࠶ࡿࠋᦤືࢆཷࡅ࡞࠸⌮᝿ⓗ࡞≧ἣࢆ௬ᐃࡋࡓ

ࡌὶᫍ⩌ࡢሙྜ࡟ࡣࠊẕኳయࡢᙟᫍάືࡸ㌶㐨ࡀ኱ࡁࡃሙྜ࡟ࡣࠊn ᅇᖐ┠ࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ fM ್ࡣࠊn ศኚ໬ࡋ࡞࠸㝈ࡾࠊ࡯ࡰྠࡌ⛬ᗘ࡟ࢲࢫࢺࡀᨺฟࡉࢀࡿࡓ

ࡢ 1 ࡜࡞ࡗ࡚ࠊࡑࡢᐦᗘࡀῶᑡࡋ࡚࠸ࡃࡇ࡜࡟࡞ࡿࠋ

ࡵࠊfM ್ࡔࡅࡢẚ㍑࡟ࡼࡿ᥎ ࡲࡎࠊẚ㍑ࡢᇶ‽࡜࡞ࡿ 1946 ᖺࡢ 10 ᭶ࡾࡹ࠺ᗙὶᫍつᶍࡢண⩌࡟ࡘ࠸࡚ fM ್ࢆ᳨ウࡋࡓࠋࡇࡢᖺ࡟ᆅ⌫࡟᥋㏆ࡍࡿ࠺࡟ẕኳయࡢ㐪࠺ὶᫍ⩌ࢆẚ㍑ࡍࡿሙྜ࡟ࡣࠊࡑࢀࡒࢀ

࡛ࠊ࠶ࡿ⛬ᗘࡢὶᫍάື

ࢆࡍࡿࡇ࡜ࡀྍ⬟࡛࠶ࡿࠋࡋ࠿ࡋࠊ௒ᅇࡢࡼ

⾲ 4. 10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢ 1946 ᖺ࡟࠾ࡅࡿࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ≧ἣ.
ᨺฟᖺ
1900
1907
1913
1920
1926
1933
1940

ᴟ኱ணሗ᫬้
᭶᪥
᫬้
(UT)
(UT)
1946/10/10.17
04:02
1946/10/10.17
03:58
1946/10/10.16
03:50
1946/10/10.16
03:46
1946/10/10.16
03:45
1946/10/10.16
03:45
1946/10/10.1603:46

ኴ㝧㯤⤒(2000.0)
197.003
197.001
196.995
196.992
196.992
196.992
196.992᥋㏆㊥㞳(au)-0.000054+0.000047+0.00064+0.00088+0.0010+0.0011+0.0012

-3−7−

ᨺฟ
㏿ᗘ
(m/s)
+2.76
+3.14
+3.31
+3.83
+4.86
+7.15
+13.86

fM
0.17
0.21
0.22
0.26
0.33
0.51
0.96

ᨺᑕⅬ఩⨨
㉥⤒
㉥⦋
㻔䜪㻕
㻔䜪㻕
262.27+53.95262.25+53.96262.22+53.99262.22+54.00262.21+54.00262.22+54.00262.22+53.99Vg(km/s)
20.45
20.45
20.44
20.44
20.44
20.44
20.44

ࡢẕኳయࡢάືᗘࡢᕪࡀ኱ࡁࡃᙳ㡪ࡍࡿ࡜⪃࠼ࡽࢀࡿ࠿⪃ᐹࡽ࡛࠶ࡿࠋ௒ᅇࠊᙟᫍࡢάືᗘࢆ♧ࡍ್࡜ࡋ࡚ᶆ‽➼⣭ ほࢆ฼⏝ࡍࡿࡇ࡜࡟ࡋࡓࠋࡇࢀࡣࠊᙟᫍኴ㝧㛫㊥㞳࠾ࡼࡧ ᴟ኱᪥ࡢ 2014 ᖺ 5 ᭶ 24 ᪥࡟ࡣࠊᴟ኱᫬้࡟࠾ࡅࡿほᙟᫍᆅ⌫㛫㊥㞳ࡀ࡜ࡶ࡟ 1 au ࡢ఩⨨࡟࠶ࡿ࡜௬ᐃࡋࡓሙ᮲௳ࡢࡼ࠸࢔࣓ࣜ࢝኱㝣ࢆ୰ᚰ࡟ࠊࡁࡾࢇᗙὶᫍ⩌ࡢྜࡢ➼⣭࡛♧ࡉࢀࠊᐇ㝿ࡢほ࠿ࡽồࡵࡽࢀࡿࠋ JPLฟ⌧ࡀほ⤖ᯝ࡜ᴟ኱᫬้

ࡉࢀࡓࠋࡲࡓࠊ࢔࣐ࢳࣗ࢔↓⥺ࡢ㟁Ἴᖏࢆ฼

Small-Body Database Browser ࡟ࡼࢀࡤࠊࣜࢽ࢔࣮ᙟᫍ⏝ࡋࡓ㟁Ἴほ࡟࠾࠸࡚ࡶࠊࡁࡾࢇᗙὶᫍ⩌࡜ᛮࢃࢀࡿ

(209P) ࡢᶆ‽➼⣭ࡣ 16.4 ➼ࠊࢪࣕࢥࣅࢽ࣭ࢳࣥࢼ࣮ᙟᫍᴟ ኱ ࡀ ほࡉ ࢀ ࡓ ࠋ IMO (International Meteor(21P) ࡢᶆ‽➼⣭ࡣ 10.5 ➼࡛࠶ࡿ (JPL, 2014)ࠋ࡞࠾ࠊᙟ

Organization; ᅜ㝿ὶᫍᶵᵓ) ࡟ࡼࡿ║どほࡢ㞟ィ⤖ᯝᫍࡢ㐣ཤࡢάືᗘ࡟ࡘ࠸࡚ࡣⱝᖸࡢኚ໬ࡀ⪃࠼ࡽࢀࡿࡀࠊ

(IMO, 2014) ࡜ࠊᮡᮏᘯᩥẶ࡟ࡼࡿ㟁Ἴほࡢ⤖ᯝ (ᮡᮏ௒ᅇࡣ࡜ࡶ࡟ྠᐃᗘࡢάືᗘࡀ⥅⥆ࡋ࡚࠸ࡓ࡜ࡳ࡞ࡋ࡚2014) ࢆᅗ 2 ࡟♧ࡍࠋ║どほ᳨ウࡍࡿࡇ࡜࡟ࡋࡓࠋᶆ‽➼⣭࡛ࡣࠊࡁࡾࢇᗙὶᫍ⩌ࡢ

᫬ 42 ศ (ୡ⏺᫬) ࡟ ZHR = 19 ࡢᴟ኱ࡀほࡢ⤖ᯝ࡛ࡣࠊ5 ᭶ 24 ᪥ 6ẕኳయࡢ᪉ࡀࠊ10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢẕኳయࡼࡾࡶ 5.9

ῶᑡࡋࡓᚋ࡟ 8 ᫬ 21 ศ (ୡ⏺᫬) ࡟ 2 ᅇ┠ࡢᴟ኱࡜ࡋ࡚

➼ᬯ࠸ࠋᫍࡢ➼⣭ࡣࠊࣟࢢࢫࢣ࣮ࣝࢆ౑⏝ࡋ࡚࠾ࡾࠊග

ZHR = 20 ࡀほᗘࡀ 100 ಸ㐪࠺ሙྜ࡟ 5 ➼⣭ࡢᕪ࡜࡞ࡗ࡚⾲ࡉࢀࡿࡼ࠺ほࡉࢀࠊ୍ᗘࡉࢀ࡚࠸ࡿࠋࡑࢀࡒࢀࡢᴟ኱᫬࡟࠾ࡅࡿ

⪅ᩘࡣࠊࡑࢀࡒࢀ 7 ྡࠊ3 ྡ࡜ᑡ࡞ࡃࠊㄗᕪ࡟ࡘ࠸

࡟ồࡵࡽࢀࡿࠋࡋࡓࡀࡗ࡚ࠊ5.9 ➼ࡢ➼⣭ᕪࡣࠊ230 ಸࡢ࡚ࡶ๓⪅ࡀ±5ࠊᚋ⪅ࡀ±7 ࡜ほගᗘᕪ࡟┦ᙜࡍࡿࠋࡇࢀ࡟ᙟᫍάືࡀẚ౛ࡍࡿ࡜⪃࠼ࡽ࠸ࡿࠋᴟ኱ᚋࡣࠊዲ᮲௳ࡢᆅᇦࡀኴᖹὒ࡟⛣ࡗࡓࡓࡵࠊ

್࡟ᑐࡋ࡚኱ࡁࡃ࡞ࡗ࡚ࢀࡿࡓࡵࠊ௚ࡢ᮲௳ࡀྠ➼ࡢሙྜࠊࡁࡾࢇᗙὶᫍ⩌ࡢฟ

ほ⌧つᶍࡣࠊ10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢ 230 ศࡢ 1 ⛬ᗘ࡜ィ⟬(IMO, 2014)ࠋኴᖹὒᆅᇦ࡛ࡣࠊᅜ❧ኳᩥྎࣁ࣡࢖ほࡉࢀࡿࡇ࡜࡟࡞ࡗࡓࠋ

࡟࠾࠸࡚ᮾி኱Ꮫࡀ୺య࡜ࡋ࡚㐠⏝ࡍࡿ඲ኳ࣓࢝ࣛ࡟ࡁ

ࡀ࡞ࡃࠊῶᑡࡋ࡚࠸ࡃᵝᏊࡣᤊ࠼ࡽࢀ࡚࠸࡞࠸
ᡤࡇࢀࡽࡼࡾࠊfM ್࠿ࡽࡢ᮲௳࡜ࠊẕኳయࡢάືᗘ࡟ࡼ

ࡾࢇᗙὶᫍ⩌࡜ᛮࢃࢀࡿὶᫍࡀグ㘓ࡉࢀࡓࡀࠊࡑࡢᩘࡣ

ࡿ᮲௳ࢆྜࢃࡏࡓሙྜࠊ2014 ᖺࡢࡁࡾࢇᗙὶᫍ⩌ࡢฟ⌧㠀ᖖ࡟ᑡ࡞࠿ࡗࡓ (Sato et al., 2014)ࠋࡇࢀࡽࢆ⪃៖ࡍࡿつᶍࡣࠊ1946 ᖺࡢ 10 ᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡢ 670 ศࡢ 1 ⛬࡜ࠊ2 ࡘࡢᴟ኱ࡀほࡉࢀࡿࡇ࡜࡜࡞ࡗࡓࠋ1946 ᖺࡢ 10ᗘࡢฟ⌧つᶍࡀணࡉࢀࡓ࡜࠸࠺ࡼࡾࡣࠊ6㹼8 ᫬ྎ࡟࠾࠸࡚ࡺࡿࡸ࠿࡞ᴟ኱ࡀほࡉࢀࡓ࡜⪃࠼ࡿ᪉ࡀጇᙜ࠿᭶ࡾࡹ࠺ᗙὶᫍ⩌ࡣࠊZHR ࡛ 9,000㹼15,000 ࡛࠶ࡗࡓࡓࡶࡋࢀ࡞࠸ࠋ࠸ࡎࢀ࡟ࡋ࡚ࡶࠊࡇࢀࡽࡢ᫬㛫ᖏࡣࠊᮏ◊ࡵࠊ2014 ᖺࡢࡁࡾࢇᗙὶᫍ⩌ࡣࠊZHR ࡛ 13㹼22 ⛬ᗘࡢ✲ཬࡧඛ⾜◊✲ࡢᴟ኱ணሗࡢ᫬㛫ᖏ࡟࠶ࡓࡾࠊẕኳయ࠿ฟ⌧つᶍ࡛࠶ࡿ࡜ணࡉࢀࡿ⤖ᯝࡀồࡵࡽࢀࡓࠋࡇࢀࡣࠊࡽࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝ࡟ࡼࡗ࡚ࡁࡾࢇᗙὶᫍ⩌ࡀฟ⌧ࡋඛ⾜◊✲࡟ᑐࡋ࡚ࠊ࠾ࡼࡑ 10 ศࡢ 1ࠊ࠶ࡿ࠸ࡣࡑࢀ௨ୗࡓࡇ࡜ࡣ☜ᐇ࡛࠶ࡿࠋಶࠎࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡀᐤ୚ࡋࡢฟ⌧つᶍࡢணࡓᙳ㡪ࢆุ᩿ࡍࡿ࡟ࡣほ್࡜࡞ࡗࡓࠋࡇࢀࡽ୍㐃ࡢணሗ᝟ሗ࡟ࡘ࠸࡚ࡣࠊၟ⏝㞧ㄅ࡛࠶ࡿࠕᫍ
ࢼࣅㄅࠖ࡟ᥖ㍕ࡋࠊᅜෆ࡟ᗈࡃఏ࠼ࡓ (బ⸨, 2014)ࠋ

ᩘࡀᑡ࡞࠸ࡀࠊᮏ◊✲ࡢணሗ࡜ẚ㍑ࡍࡿ࡜ࠊ1 ࡘ┠ࡢᴟ኱ࡣࠊ1803 ᖺ㹼1878 ᖺࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ᥋㏆ࡢ㡭࡟ヱᙜࡍࡿࠋ୍᪉࡛ 2 ࡘ┠ࡢᴟ኱࡟ヱᙜࡍࡿࡼ࠺࡞ࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ᥋㏆ࡣࠊᮏ◊✲࡟ࡣぢฟࡉࢀ࡞࠿ࡗࡓࠋ

ᅗ 2. ࡁࡾࢇᗙὶᫍ⩌ࡢほ⤖ᯝ.

IMO: IMO, 2014; HRO: Sugimoto, 2014.
-4−8− 㟁Ἴほࡶほࢀࡓࠋࡋ࠿ࡋ࡞ࡀࡽࠊࡼࡾᬑ㐢ⓗ࡟⢭ᗘࡢⰋ࠸ฟ⌧ண࡟࠾࠸࡚ࡣࠊᴟ኱᫬้ࡀ᪥୰࡛࠶ࡗࡓ᪥ᮏ࡛

ྍ⬟࡛࠶ࡾࠊᅜෆ 10 ᆅⅬࠊᾏእ 26 ᆅⅬࡢほࢆ⾜࠺ࡓࡵ࡟ࡣࠊ௒ᅇࡢᡭἲࢆࡉࡽ࡟ᨵⰋࡋࠊࡉࡽ࡟⤒ࡀࡲ࡜ࡵࡽࢀࡓࠋ㞟ィ⤖ᯝ࡟ࡼࡿ࡜ࠊ7 ᫬ 30 ศ (ୡ⏺᫬) ࡟║どほࡼࡾࡶⱝᖸฟ⌧つᶍࡀ኱ࡁ࠸ ZHR = 39.3 ࡢᴟ኱ࡀほࡉࢀࡓ (ᮡᮏ, 2014)ࠋ㟁Ἴほ㦂್ࢆ✚ࢇ࡛࠸ࡃࡇ࡜ࡀᚲせ࡜࡞ࡿࠋ࡛ࡣࠊ║どほཧ⪃ᩥ⊩ࡼࡾࡶᬯ࠸ὶᫍࡲ࡛ᤊ࠼ࡿࡇ࡜ࡀ࡛ࡁࡿࡓࡵࠊᬯ࠸ὶᫍ

Asher, D. J., 2000. In: Proc. Int. Meteor Conf., Frasso Sabino,ࡢከ࠸ᴟ኱ࢆᤊ࠼ࡓྍ⬟ᛶࡀ࠶ࡿࠋᮏ◊✲ࡢணሗ࡜ẚ㍑

Italy, pp. 23-26 September 1999, ed. R. Arlt (Mechelen,Belgium:International Meteor Organization), p. 5.

ࡍࡿ࡜ࠊ1909 ᖺᨺฟࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢ᥋㏆᫬้࡟㏆ࡃࠊࡇࡢࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡀ㛵୚ࡋࡓྍ⬟ᛶࡀ⪃࠼ࡽࢀ

Jenniskens, P., 1995. A & A (Astron. Astrophys),295(1): 206.

ࡓࠋJenniskens, P., 2006. Meteor Showers and their ParentComets, p. 352.
Sato, M., 2003. WGN (J. Int. Meteor Org.), 31: 59.

 ฟ⌧つᶍࡢ᳨ウ ὶᫍ⩌ࡢฟ⌧つᶍࡣࠊ๓㏙ࡢ㏻ࡾࠊ║どほబ⸨ᖿဢ, 2014. ᭶หᫍࢼࣅ, 2014 ᖺ 6 ᭶ྕ.

࡟࠾࠸࡚బ⸨ᖿဢ, et al., 2014. ᪥ᮏኳᩥᏛ఍ 2014 ᖺ⛅Ꮨ኱఍ㅮ

ZHR = 20 ⛬ᗘ࡟࡜࡝ࡲࡗࡓ (IMO, 2014)ࠋࡇࢀࡣࠊᮏ◊₇ண✏㞟, p.118.

✲࠿ࡽᚓࡽࢀࡓணሗ್࡛࠶ࡿ ZHR = 13㹼22 ࡟㏆࠸⤖ᯝ࡜ゝ࠼ࡿࠋ㟁Ἴほ࡛ࡣࠊZHR = 40 ⛬ᗘࡢฟ⌧ࡀᤊ࠼ࡽࢀࡓࡀࠊࡇࢀࡶᮏ◊✲ࡢணሗ࡟ᑐࡋ࡚⣙ 2 ಸࡢᕪ࡟࡜࡝

Online Available from InternetࡲࡗࡓࠋࡇࢀࡣࠊZHR ࡢணሗ್ࡀ 100 ࢆ㉸࠼࡚࠸ࡓඛ⾜Maslov, M., 2010. 209p-ids 1901-2100 : activity predictions.

◊✲ࡼࡾࠊ⢭ᗘࡢⰋ࠸ࡶࡢ࡛࠶ࡗࡓ࡜ゝ࠼ࡿࠋࡇࡢ⤖ᯝ

http://feraj.narod.ru/Radiants/Predictions/1901-2100eng/20

࠿ࡽࠊẕኳయࡀ␗࡞ࡿูࡢὶᫍ⩌ࡢ㐣ཤࡢฟ⌧ࢆᇶ‽࡜

9p-ids1901-2100predeng.html

ࡋࡓሙྜ࡟ࡶࠊࢲࢫࢺ࣭ࢺࣞ࢖ࣝࡢศᕸࡸࡑࢀࢆᙧᡂࡍ(accessed on 2014-04-06)
Vaubaillon, J., 2012. The next big meteor shower.

ࡿࢲࢫࢺࡢᨺฟ᮲௳ࡀఝࡓ≧ἣୗ࡟࠶ࡿሙྜ࡟ࡣࠊฟ⌧つᶍࢆண

http://www.imcce.fr/langues/en/ephemerides/phenomenes/ࡋ࠺ࡿࡶࡢ࡜⪃࠼ࡽࢀࡓࠋ

meteor/DATABASE/209_LINEAR/2014/index.php ୍᪉࡛ࠊ௒ᅇࡢ᳨ウせ⣲࡟ࡣྵࡲࢀ࡞࠸ูࡢせ⣲ࡀࠊ

(accessed on 2014-04-06)ฟ⌧つᶍ࡟ᙳ㡪ࡍࡿྍ⬟ᛶࡶ࠶ࡿࠋ౛࠼ࡤࠊࢲࢫࢺ࣭ࢺ

Kinoshita, K., 2012. 209P/LINEAR.

ࣞ࢖ࣝ࡜ᆅ⌫ࡢ᥋㏆㊥㞳ࡸࠊࢲࢫࢺࡀᨺฟࡉࢀࡓ࡜ࡁࡢ

http://jcometobs.web.fc2.com/pcmtn/0209p.htm㏿ᗘࡢ㐪࠸࡛࠶ࡿࠋࡇࡢࡼ࠺࡞せ⣲ࡶྵࡵ࡚ࡉࡽ࡟᳨ウࡋࠊࣔࢹࣝィ⟬࡜ᐇ㝿ࡢほ(accessed on 2012-10-09)⤖ᯝࢆẚ㍑࡛ࡁࡿࡼ࠺࡞⤒JPL, 2014. JPL Small-Body Database Browser.

㦂್ࢆ✚ࡳ㔜ࡡ࡚࠸ࡃᚲせࡀ࠶ࡿ࡜ᛮࢃࢀࡓࠋ

http://ssd.jpl.nasa.gov/sbdb.cgi(accessed on 2014-04-09)⤖ㄽICQ, 2014. ICQ/CBAT/MPC: Recent Comet Magnitudes.

 ㏆ᖺࠊྛ◊✲⪅ࡀ㐍ࡵ࡚ࡁࡓࢲࢫࢺ࣭ࢺࣞ࢖ࣝࣔࢹࣝ࡟ࡼࡿࢩ࣑࣮ࣗࣞࢩࣙࣥィ⟬࡟ࡼࡾࠊὶᫍ⩌ࡢᴟ኱᫬้

http://www.icq.eps.harvard.edu/CometMags.html

࡟࠾࠸࡚ࡣࠊ⢭ᗘࡢⰋ࠸ண(accessed on 2015-12-25)

ࡀ࡛ࡁࡿࡼ࠺࡟࡞ࡗ࡚ࡁࡓࠋ௒ᅇࡢࡁࡾࢇᗙὶᫍ⩌ࡢฟ⌧࡟ࡘ࠸࡚ࡶࠊඛ⾜◊✲ཬࡧIMO, 2014. Camelopardalids 2014: visual data quicklook.

ᮏ◊✲࡟࠾࠸࡚ࠊ࠶ࡿ⛬ᗘࡣࡇࡢ⢭ᗘࢆ☜ㄆࡍࡿࡇ࡜ࡀ

http://www.imo.net/live/cameleopardalids2014/࡛ࡁࡓ࡜⪃࠼ࡽࢀࡿࠋ(accessed on 2014-09-10) ୍᪉࡛ࠊฟ⌧つᶍ࡟ࡘ࠸࡚ࡢணᡭἲࡣ☜❧ࡋ࡚࠾ࡽᮡᮏᘯᩥ, 2014. HRO ࡁࡾࢇᗙὶᫍ⩌㏿ሗ.

ࡎࠊࡲࡔㄢ㢟ࡀከ࠸ࠋ௒ᅇ➹⪅ࡣࠊ᮲௳ࡢⰋࡃఝࡓูࡢ

http://www5f.biglobe.ne.jp/~hro/Flash/2014/CAM/index.htὶᫍ⩌ࢆᇶ‽࡟ࠊࡁࡾࢇᗙὶᫍ⩌ࡢฟ⌧つᶍࡢணmࡳࡓࠋᐇ㝿ࡢほࢆヨ(accessed on 2014-06-10)⤖ᯝ࡜ẚ㍑ࡋ᳨࡚ウࡋࡓ࡜ࡇࢁࠊඛ⾜◊✲ࡼࡾࡶ⢭ᗘࡢⰋ࠸ணࢆࡍࡿࡇ࡜ࡀ࡛ࡁࡓ࡜⪃࠼ࡽ

-5−9−

− 10 −