ペルセウス座流星群観測報告

<BODY marginwidth="20" marginheight="20" topmargin="20" leftmargin="20"> <DIV class="standard_width"> <H1>■ペルセウス座流星群観測報告</H1> <P>今年も夏がやってきました。夏といえばペルセ群！　今年で３年連続おすすめ１位、いよいよ<STRONG>『流星群の王者』</STRONG>へと返り咲いた感がしますね。そんなペルセ群、今年は月齢条件がいいことに加え、何やら突発？の予報まで出ていて目が離せません。さて結果や如何に？　それでは<STRONG>「突発群監視強化３カ年計画１年目第1.5弾」</STRONG>ペルセ群、行ってみましょう。</P> <HR size="1"> <H3>■観測結果</H3> <TABLE border="0" width="480" cellspacing="1" cellpadding="1" align="center"> <TR valign="top"> <TD><STRONG>観測地：</STRONG></TD> <TD>竜天天文台公園（岡山県赤磐郡吉井町）　標高470m<BR> 東経134°00′18″　北緯34°53′26″</TD> </TR> <TR valign="top"> <TD><STRONG>観測者：</STRONG></TD> <TD>L!b</TD> </TR> <TR valign="top"> <TD><STRONG>観測方法：</STRONG></TD> <TD>眼視計数観測</TD> </TR> </TABLE> <TABLE border="0" width="480" cellspacing="0" cellpadding="1" align="center"> <TR valign="bottom"> <TH class="tone4"><SPAN class="white">日付</SPAN></TH> <TH class="tone4"><SPAN class="white">開始</SPAN></TH> <TH class="tone4"><SPAN class="white">終了</SPAN></TH> <TH class="tone4"><SPAN class="white">分</SPAN></TH> <TH class="tone4"><SPAN class="white">全<BR>流<BR>星</SPAN></TH> <TH class="tone4"><SPAN class="white">散<BR>在</SPAN></TH> <TH class="tone4"><SPAN class="white">ペ<BR>ル<BR>セ<BR>ウ<BR>ス</SPAN></TH> <TH class="tone4"><SPAN class="white">δ<BR>み<BR>ず<BR>が<BR>め</SPAN></TH> <TH class="tone4"><SPAN class="white">ζ<BR>み<BR>ず<BR>が<BR>め</SPAN></TH> <TH class="tone4"><SPAN class="white">ι<BR>み<BR>ず<BR>が<BR>め</SPAN></TH> <TH class="tone4"><SPAN class="white">や<BR>ぎ</SPAN></TH> <TH class="tone4"><SPAN class="white">は<BR>く<BR>ち<BR>ょ<BR>う</SPAN></TH> <TH class="tone4"><SPAN class="white">最<BR>微</SPAN></TH> <TH class="tone4"><SPAN class="white">雲<BR>量</SPAN></TH> <TH class="tone4"><SPAN class="white">方<BR>向</SPAN></TH> </TR> <TR> <TD colspan="15" class="tone2"><STRONG>　2004年8月</STRONG></TD> </TR> <TR> <TH class="tone0"><SPAN class="color">10/11</SPAN></TH> <TH class="tone0"><SPAN class="color">2:15</SPAN></TH> <TH class="tone0"><SPAN class="color">3:15</SPAN></TH> <TH class="tone0"><SPAN class="color">60</SPAN></TH> <TH class="tone0"><SPAN class="black">29</SPAN></TH> <TH class="tone0"><SPAN class="black">7</SPAN></TH> <TH class="tone0"><SPAN class="red">17</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">3</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="color">6.2</SPAN></TH> <TH class="tone0"><SPAN class="color">0.0</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">11/12</SPAN></TH> <TH class="tone1"><SPAN class="color">23:00</SPAN></TH> <TH class="tone1"><SPAN class="color">0:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">42</SPAN></TH> <TH class="tone1"><SPAN class="black">9</SPAN></TH> <TH class="tone1"><SPAN class="red">28</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="color">6.2</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">0:00</SPAN></TH> <TH class="tone1"><SPAN class="color">1:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">35</SPAN></TH> <TH class="tone1"><SPAN class="black">8</SPAN></TH> <TH class="tone1"><SPAN class="red">22</SPAN></TH> <TH class="tone1"><SPAN class="black">3</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.2</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">1:00</SPAN></TH> <TH class="tone1"><SPAN class="color">2:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">60</SPAN></TH> <TH class="tone1"><SPAN class="black">14</SPAN></TH> <TH class="tone1"><SPAN class="red">40</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">2:00</SPAN></TH> <TH class="tone1"><SPAN class="color">3:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">56</SPAN></TH> <TH class="tone1"><SPAN class="black">20</SPAN></TH> <TH class="tone1"><SPAN class="red">34</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">3:00</SPAN></TH> <TH class="tone1"><SPAN class="color">4:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">76</SPAN></TH> <TH class="tone1"><SPAN class="black">8</SPAN></TH> <TH class="tone1"><SPAN class="red">62</SPAN></TH> <TH class="tone1"><SPAN class="black">3</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">12/13</SPAN></TH> <TH class="tone0"><SPAN class="color">23:00</SPAN></TH> <TH class="tone0"><SPAN class="color">23:50</SPAN></TH> <TH class="tone0"><SPAN class="color">50</SPAN></TH> <TH class="tone0"><SPAN class="black">32</SPAN></TH> <TH class="tone0"><SPAN class="black">6</SPAN></TH> <TH class="tone0"><SPAN class="red">23</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">3</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="color">5.9</SPAN></TH> <TH class="tone0"><SPAN class="color">0.1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">　</SPAN></TH> <TH class="tone0"><SPAN class="color">23:50</SPAN></TH> <TH class="tone0"><SPAN class="color">0:40</SPAN></TH> <TH class="tone0"><SPAN class="color">50</SPAN></TH> <TH class="tone0"><SPAN class="black">34</SPAN></TH> <TH class="tone0"><SPAN class="black">4</SPAN></TH> <TH class="tone0"><SPAN class="red">27</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="color">5.9</SPAN></TH> <TH class="tone0"><SPAN class="color">0.1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">　</SPAN></TH> <TH class="tone0"><SPAN class="color">0:40</SPAN></TH> <TH class="tone0"><SPAN class="color">1:30</SPAN></TH> <TH class="tone0"><SPAN class="color">50</SPAN></TH> <TH class="tone0"><SPAN class="black">34</SPAN></TH> <TH class="tone0"><SPAN class="black">6</SPAN></TH> <TH class="tone0"><SPAN class="red">28</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="color">6.0</SPAN></TH> <TH class="tone0"><SPAN class="color">0.0</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">　</SPAN></TH> <TH class="tone0"><SPAN class="color">1:30</SPAN></TH> <TH class="tone0"><SPAN class="color">2:20</SPAN></TH> <TH class="tone0"><SPAN class="color">50</SPAN></TH> <TH class="tone0"><SPAN class="black">39</SPAN></TH> <TH class="tone0"><SPAN class="black">7</SPAN></TH> <TH class="tone0"><SPAN class="red">30</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="color">6.1</SPAN></TH> <TH class="tone0"><SPAN class="color">1.2</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">　</SPAN></TH> <TH class="tone0"><SPAN class="color">2:40</SPAN></TH> <TH class="tone0"><SPAN class="color">3:25</SPAN></TH> <TH class="tone0"><SPAN class="color">45</SPAN></TH> <TH class="tone0"><SPAN class="black">35</SPAN></TH> <TH class="tone0"><SPAN class="black">2</SPAN></TH> <TH class="tone0"><SPAN class="red">31</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="color">5.9</SPAN></TH> <TH class="tone0"><SPAN class="color">2.1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">　</SPAN></TH> <TH class="tone0"><SPAN class="color">3:25</SPAN></TH> <TH class="tone0"><SPAN class="color">4:10</SPAN></TH> <TH class="tone0"><SPAN class="color">45</SPAN></TH> <TH class="tone0"><SPAN class="black">45</SPAN></TH> <TH class="tone0"><SPAN class="black">4</SPAN></TH> <TH class="tone0"><SPAN class="red">40</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="color">5.9</SPAN></TH> <TH class="tone0"><SPAN class="color">0.0</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">13/14</SPAN></TH> <TH class="tone1"><SPAN class="color">0:00</SPAN></TH> <TH class="tone1"><SPAN class="color">1:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">40</SPAN></TH> <TH class="tone1"><SPAN class="black">13</SPAN></TH> <TH class="tone1"><SPAN class="red">26</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.2</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">1:00</SPAN></TH> <TH class="tone1"><SPAN class="color">2:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">42</SPAN></TH> <TH class="tone1"><SPAN class="black">10</SPAN></TH> <TH class="tone1"><SPAN class="red">26</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">2:05</SPAN></TH> <TH class="tone1"><SPAN class="color">2:55</SPAN></TH> <TH class="tone1"><SPAN class="color">50</SPAN></TH> <TH class="tone1"><SPAN class="black">33</SPAN></TH> <TH class="tone1"><SPAN class="black">10</SPAN></TH> <TH class="tone1"><SPAN class="red">21</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">　</SPAN></TH> <TH class="tone1"><SPAN class="color">3:00</SPAN></TH> <TH class="tone1"><SPAN class="color">4:00</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">44</SPAN></TH> <TH class="tone1"><SPAN class="black">16</SPAN></TH> <TH class="tone1"><SPAN class="red">24</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="black">2</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="color">6.4</SPAN></TH> <TH class="tone1"><SPAN class="color">0.0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> </TR> <TR> <TH class="tone2"><SPAN class="color">月合計</SPAN></TH> <TH class="tone2"><SPAN class="color">　</SPAN></TH> <TH class="tone2"><SPAN class="color">　</SPAN></TH> <TH class="tone2"><SPAN class="color">880</SPAN></TH> <TH class="tone2"><SPAN class="black">676</SPAN></TH> <TH class="tone2"><SPAN class="black">144</SPAN></TH> <TH class="tone2"><SPAN class="red">479</SPAN></TH> <TH class="tone2"><SPAN class="black">16</SPAN></TH> <TH class="tone2"><SPAN class="black">14</SPAN></TH> <TH class="tone2"><SPAN class="black">8</SPAN></TH> <TH class="tone2"><SPAN class="black">9</SPAN></TH> <TH class="tone2"><SPAN class="black">6</SPAN></TH> <TH class="tone2"><SPAN class="color">　</SPAN></TH> <TH class="tone2"><SPAN class="color">　</SPAN></TH> <TH class="tone2"><SPAN class="color">　</SPAN></TH> </TR> </TABLE> <P><IMG alt="ＨＲ" src="hr.gif" width="480" height="240"></P>  <HR size="1"> <H3>■観測日記</H3> <H5>●8月10/11日</H5> <UL> うちの会社、10日までが仕事でした。つまるとこ、今夜は会社から直行！です。定時そこそこに仕事を切り上げ、いざ竜天！　たどり着いた竜天の地はあまりよろしくない天気でしたが、ま、今夜はどのみち体調的に長時間は厳しいので、天候回復を待ちつつ仮眠。その後、ちょっと寝過ごしたり、霧に飲み込まれたりで結局1時間の観測となりました。さて、ペルセ群、ちょっと少なめ？といった感じでしょうか。 </UL> <H5>●8月11/12日</H5> <UL> 極大前夜。ここ数年盆といえば「秋雨の季節」でしたが、今日は日中から見事なピーカン。今夜は天気の心配、全くなさそうです。そう、たとえぶりゅ～氏が来ようとも。そんな天気に誘われて、今夜は23時より観測開始。竜天としては「上の中」といった空で、これだけいい空で流観するの久しぶり～とか思っていたら、オーストラリアの空に毒されたぶりゅ～氏の一言「大していい空とは思わん」…　さて、夜明け後に突発？の予報時刻を控えたペルセ群、明け方にはHR＝62をマーク、それなりに活発だったかとは思いますが…　マイナス等級わずか５個火球１個！と～っても地味でした。ただ、観測終了後の火球は見事でしたね～。 </UL> <H5>●8月12/13日</H5> <UL> いよいよ極大夜。今夜の空は昨夜に比べ２ランクダウン。夕方ごろに極大を迎えた後ということで、今夜も23時から観測開始。空の条件もあって、昨夜とそう変わらないペースといった感じですが、明るい流星は今夜のほうが圧倒的に多いですね。かなり普通のペルセ群に戻った感じです。もっとも、火球となると相変わらず少ないですけど。 </UL> <H5>●8月13/14日</H5> <UL> 今日もいい天気。こっちに来た時の予想では今夜は怪しかったんですが、持ってくれました。今夜は普通に０時からのスタートです。フル回転も今夜で３夜目ですが、そろそろ限界が…　ドーピングしたり、気合入れたり、休憩入れたりしながら何とか4時まで見ましたが…　そのせいもあってでしょうか？もうちょっと出てもいいかなという数字ですね。さて、これで極大を挟む３夜、しっかりと見ることができたことになるのですが、それはすなわち３夜14時間分の記録をビデオから起こさないといけない、ということなんですねぇ… </UL> <H5>●8月14/15日</H5> <UL> 今夜は天気、持ちませんでした。もっとも、天気が持ったとしても体が保たなかっただろうから、いっそ、恵みの雨？ </UL> <HR size="1"> <P>というわけで、久々に条件に恵まれたペルセ群の…というより、主要群の極大でした。この調子で次のアレもしっかり見えるといいけどなぁ…</P> <DIV align="right" class="author">〔L!b〕</DIV> <HR size="1"> <DIV 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