２００４年４月観測報告

<BODY marginwidth="20" marginheight="20" topmargin="20" leftmargin="20"> <DIV class="standard_width"> <H1>■２００４年４月観測報告</H1> <P>月日のたつのは早いもので、この４月より長女がなんと小学校へ入学！ピッカピカの１年生！学校までは徒歩５分ほどだが、登校時間の関係で親子で６時起きをするハメに・・・　観測時間が削られそう・・・</P> <HR size="1"> <H3>■観測結果</H3> <TABLE border="0" width="480" cellspacing="0" cellpadding="1" align="center"> <TR valign="top"> <TD width="80"><STRONG>観測地：</STRONG></TD> <TD width="400">静岡県御殿場市古沢<BR> 東経138°56′36″　北緯35°20′00″</TD> </TR> <TR valign="top"> <TD width="80"><STRONG>観測者：</STRONG></TD> <TD width="400">東の観測装置</TD> </TR> <TR valign="top"> <TD width="80"><STRONG>観測方法：</STRONG></TD> <TD width="400">眼視プロット観測（プ），眼視計数観測（計）</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">お<BR>と<BR>め</SPAN></TH> <TH class="tone4"><SPAN class="white">κ<BR>こ<BR>と</SPAN></TH> <TH class="tone4"><SPAN class="white">α<BR>か<BR>ん<BR>む<BR>り</SPAN></TH> <TH class="tone4"><SPAN class="white">４<BR>月<BR>α<BR>う<BR>し<BR>か<BR>い</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> <TH class="tone4"><SPAN class="white">方<BR>法</SPAN></TH> </TR> <TR> <TD colspan="14" class="tone2"><STRONG>　2004年4月</STRONG></TD> </TR> <TR> <TH class="tone0"><SPAN class="color">2/3</SPAN></TH> <TH class="tone0"><SPAN class="color">20:45</SPAN></TH> <TH class="tone0"><SPAN class="color">22:00</SPAN></TH> <TH class="tone0"><SPAN class="color">75</SPAN></TH> <TH class="tone0"><SPAN class="black">13</SPAN></TH> <TH class="tone0"><SPAN class="black">12</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="red">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="color">5.2</SPAN></TH> <TH class="tone0"><SPAN class="color">0</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">3/4</SPAN></TH> <TH class="tone1"><SPAN class="color">19:45</SPAN></TH> <TH class="tone1"><SPAN class="color">20:45</SPAN></TH> <TH class="tone1"><SPAN class="color">60</SPAN></TH> <TH class="tone1"><SPAN class="black">9</SPAN></TH> <TH class="tone1"><SPAN class="black">8</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="red">-</SPAN></TH> <TH class="tone1"><SPAN class="black">-</SPAN></TH> <TH class="tone1"><SPAN class="black">-</SPAN></TH> <TH class="tone1"><SPAN class="color">4.7</SPAN></TH> <TH class="tone1"><SPAN class="color">1</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> <TH class="tone1"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">6/7</SPAN></TH> <TH class="tone0"><SPAN class="color">21:45</SPAN></TH> <TH class="tone0"><SPAN class="color">23:00</SPAN></TH> <TH class="tone0"><SPAN class="color">75</SPAN></TH> <TH class="tone0"><SPAN class="black">16</SPAN></TH> <TH class="tone0"><SPAN class="black">15</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="red">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="color">5.3</SPAN></TH> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">9/10</SPAN></TH> <TH class="tone1"><SPAN class="color">20:50</SPAN></TH> <TH class="tone1"><SPAN class="color">22:00</SPAN></TH> <TH class="tone1"><SPAN class="color">70</SPAN></TH> <TH class="tone1"><SPAN class="black">40</SPAN></TH> <TH class="tone1"><SPAN class="black">39</SPAN></TH> <TH class="tone1"><SPAN class="black">1</SPAN></TH> <TH class="tone1"><SPAN class="red">-</SPAN></TH> <TH class="tone1"><SPAN class="black">-</SPAN></TH> <TH class="tone1"><SPAN class="black">-</SPAN></TH> <TH class="tone1"><SPAN class="color">5.8</SPAN></TH> <TH class="tone1"><SPAN class="color">0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> <TH class="tone1"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">10/11</SPAN></TH> <TH class="tone0"><SPAN class="color">21:25</SPAN></TH> <TH class="tone0"><SPAN class="color">22:30</SPAN></TH> <TH class="tone0"><SPAN class="color">65</SPAN></TH> <TH class="tone0"><SPAN class="black">29</SPAN></TH> <TH class="tone0"><SPAN class="black">25</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="red">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="black">-</SPAN></TH> <TH class="tone0"><SPAN class="color">5.8</SPAN></TH> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">16/17</SPAN></TH> <TH class="tone1"><SPAN class="color">21:45</SPAN></TH> <TH class="tone1"><SPAN class="color">22:20</SPAN></TH> <TH class="tone1"><SPAN class="color">35</SPAN></TH> <TH class="tone1"><SPAN class="black">13</SPAN></TH> <TH class="tone1"><SPAN class="black">13</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="red">-</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">5.8</SPAN></TH> <TH class="tone1"><SPAN class="color">2</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> <TH class="tone1"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">20/21</SPAN></TH> <TH class="tone0"><SPAN class="color">1:30</SPAN></TH> <TH class="tone0"><SPAN class="color">2:30</SPAN></TH> <TH class="tone0"><SPAN class="color">60</SPAN></TH> <TH class="tone0"><SPAN class="black">51</SPAN></TH> <TH class="tone0"><SPAN class="black">37</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="red">11</SPAN></TH> <TH class="tone0"><SPAN class="black">2</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="color">5.8</SPAN></TH> <TH class="tone0"><SPAN class="color">0</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">計</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">21/22</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">52</SPAN></TH> <TH class="tone1"><SPAN class="black">33</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="red">15</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="color">5.5</SPAN></TH> <TH class="tone1"><SPAN class="color">0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> <TH class="tone1"><SPAN class="color">計</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">22/23</SPAN></TH> <TH class="tone0"><SPAN class="color">1:15</SPAN></TH> <TH class="tone0"><SPAN class="color">2:15</SPAN></TH> <TH class="tone0"><SPAN class="color">60</SPAN></TH> <TH class="tone0"><SPAN class="black">47</SPAN></TH> <TH class="tone0"><SPAN class="black">30</SPAN></TH> <TH class="tone0"><SPAN class="black">1</SPAN></TH> <TH class="tone0"><SPAN class="red">12</SPAN></TH> <TH class="tone0"><SPAN class="black">2</SPAN></TH> <TH class="tone0"><SPAN class="black">2</SPAN></TH> <TH class="tone0"><SPAN class="color">5.5</SPAN></TH> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">計</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">24/25</SPAN></TH> <TH class="tone1"><SPAN class="color">21:10</SPAN></TH> <TH class="tone1"><SPAN class="color">22:30</SPAN></TH> <TH class="tone1"><SPAN class="color">80</SPAN></TH> <TH class="tone1"><SPAN class="black">56</SPAN></TH> <TH class="tone1"><SPAN class="black">41</SPAN></TH> <TH class="tone1"><SPAN class="black">0</SPAN></TH> <TH class="tone1"><SPAN class="red">4</SPAN></TH> <TH class="tone1"><SPAN class="black">3</SPAN></TH> <TH class="tone1"><SPAN class="black">4</SPAN></TH> <TH class="tone1"><SPAN class="color">6.0</SPAN></TH> <TH class="tone1"><SPAN class="color">0</SPAN></TH> <TH class="tone1"><SPAN class="color">Z</SPAN></TH> <TH class="tone1"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">30/1</SPAN></TH> <TH class="tone0"><SPAN class="color">21:00</SPAN></TH> <TH class="tone0"><SPAN class="color">22:00</SPAN></TH> <TH class="tone0"><SPAN class="color">60</SPAN></TH> <TH class="tone0"><SPAN class="black">9</SPAN></TH> <TH class="tone0"><SPAN class="black">8</SPAN></TH> <TH class="tone0"><SPAN class="black">0</SPAN></TH> <TH class="tone0"><SPAN class="red">-</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">5.0</SPAN></TH> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">Z</SPAN></TH> <TH class="tone0"><SPAN class="color">プ</SPAN></TH> </TR> <TR> <TH class="tone2"><SPAN class="color">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">700</SPAN></TH> <TH class="tone2"><SPAN class="black">335</SPAN></TH> <TH class="tone2"><SPAN class="black">261</SPAN></TH> <TH class="tone2"><SPAN class="black">5</SPAN></TH> <TH class="tone2"><SPAN class="red">42</SPAN></TH> <TH class="tone2"><SPAN class="black">10</SPAN></TH> <TH class="tone2"><SPAN class="black">9</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> <TH class="tone2"><SPAN class="color">　</SPAN></TH> </TR> </TABLE> <BR> <TABLE border="0" width="400" cellspacing="0" cellpadding="0" align="center"> <TR> <TD><IMG alt="観測結果" src="hr.gif" width="400" height="300"></TD> </TR> </TABLE> <TABLE border="0" width="400" cellspacing="1" cellpadding="0" align="center"> <TR> <TD class="color">κこと座流星群の<STRONG>HR</STRONG>(1時間あたりの流星数)をプロットしたもの。</TD> </TR> </TABLE> <H4>■輻射点情報</H4> <TABLE border="0" width="480" cellspacing="0" cellpadding="1" align="center"> <TR> <TH class="tone4"><SPAN class="white">No.</SPAN></TH> <TH colspan="3" class="tone4"><SPAN class="white">日時（世界時）</SPAN></TH> <TH class="tone4"><SPAN class="white">名称</SPAN></TH> <TH class="tone4"><SPAN class="white">赤経</SPAN></TH> <TH class="tone4"><SPAN class="white">赤緯</SPAN></TH> <TH class="tone4"><SPAN class="white">個数</SPAN></TH> <TH class="tone4"><SPAN class="white">直径</SPAN></TH> <TH class="tone4"><SPAN class="white">Wt</SPAN></TH> <TH class="tone4"><SPAN class="white">速度</SPAN></TH> <TH class="tone4"><SPAN class="white">等級</SPAN></TH> <TH class="tone4"><SPAN class="white">HR</SPAN></TH> <TH class="tone4"><SPAN class="white">備考</TH> </TR> <TR> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">2004</SPAN></TH> <TH class="tone0"><SPAN class="color">4</SPAN></TH> <TH class="tone0"><SPAN class="color">10.54</SPAN></TH> <TH class="tone0"><SPAN class="color">ρBoo</SPAN></TH> <TH class="tone0"><SPAN class="color">212</SPAN></TH> <TH class="tone0"><SPAN class="color">+29</SPAN></TH> <TH class="tone0"><SPAN class="color">4</SPAN></TH> <TH class="tone0"><SPAN class="color">3</SPAN></TH> <TH class="tone0"><SPAN class="color">P</SPAN></TH> <TH class="tone0"><SPAN class="color">M-rR</SPAN></TH> <TH class="tone0"><SPAN class="color">4.3</SPAN></TH> <TH class="tone0"><SPAN class="color">3.7</SPAN></TH> <TH class="tone0"><SPAN class="color">　</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">2</SPAN></TH> <TH class="tone1"><SPAN class="color">2004</SPAN></TH> <TH class="tone1"><SPAN class="color">4</SPAN></TH> <TH class="tone1"><SPAN class="color">24.53</SPAN></TH> <TH class="tone1"><SPAN class="color">αBoo</SPAN></TH> <TH class="tone1"><SPAN class="color">211</SPAN></TH> <TH class="tone1"><SPAN class="color">+18</SPAN></TH> <TH class="tone1"><SPAN class="color">4</SPAN></TH> <TH class="tone1"><SPAN class="color">3</SPAN></TH> <TH class="tone1"><SPAN class="color">1</SPAN></TH> <TH class="tone1"><SPAN class="color">S-M</SPAN></TH> <TH class="tone1"><SPAN class="color">4.3</SPAN></TH> <TH class="tone1"><SPAN class="color">3.0</SPAN></TH> <TH class="tone1"><SPAN class="color">　</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">3</SPAN></TH> <TH class="tone0"><SPAN class="color">2004</SPAN></TH> <TH class="tone0"><SPAN class="color">4</SPAN></TH> <TH class="tone0"><SPAN class="color">24.53</SPAN></TH> <TH class="tone0"><SPAN class="color">εBoo</SPAN></TH> <TH class="tone0"><SPAN class="color">221</SPAN></TH> <TH class="tone0"><SPAN class="color">+27</SPAN></TH> <TH class="tone0"><SPAN class="color">4</SPAN></TH> <TH class="tone0"><SPAN class="color">2</SPAN></TH> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">rS-rR</SPAN></TH> <TH class="tone0"><SPAN class="color">4.5</SPAN></TH> <TH class="tone0"><SPAN class="color">3.0</SPAN></TH> <TH class="tone0"><SPAN class="color">　</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">4</SPAN></TH> <TH class="tone1"><SPAN class="color">2004</SPAN></TH> <TH class="tone1"><SPAN class="color">4</SPAN></TH> <TH class="tone1"><SPAN class="color">24.53</SPAN></TH> <TH class="tone1"><SPAN class="color">αCrB</SPAN></TH> <TH class="tone1"><SPAN class="color">232</SPAN></TH> <TH class="tone1"><SPAN class="color">+28</SPAN></TH> <TH class="tone1"><SPAN class="color">3</SPAN></TH> <TH class="tone1"><SPAN class="color">2</SPAN></TH> <TH class="tone1"><SPAN class="color">P</SPAN></TH> <TH class="tone1"><SPAN class="color">M-rR</SPAN></TH> <TH class="tone1"><SPAN class="color">4.3</SPAN></TH> <TH class="tone1"><SPAN class="color">2.3</SPAN></TH> <TH class="tone1"><SPAN class="color">　</SPAN></TH> </TR> </TABLE> <BR> <TABLE border="0" width="480" cellspacing="0" cellpadding="0" align="center"> <TR> <TD><IMG alt="輻射点情報" src="rp.gif" width="480" height="186"></TD> </TR> </TABLE> <TABLE border="0" width="480" cellspacing="1" cellpadding="0" align="center"> <TR> <TD class="color">検出された輻射点を星図にプロットしたもの。図の座標系は黄道座標。太陽の位置は、2004年4月16日0時00分(世界時)。星図は、アストロアーツのステラナビゲータで作成。</TD> </TR> </TABLE> <H4>■火球情報</H4> <TABLE border="0" width="480" cellspacing="0" cellpadding="1" align="center"> <TR> <TH class="tone4"><SPAN class="white">No.</SPAN></TH> <TH colspan="5" class="tone4"><SPAN class="white">日時（日本標準時）</SPAN></TH> <TH class="tone4"><SPAN class="white">出現星座</SPAN></TH> <TH class="tone4"><SPAN class="white">等級</SPAN></TH> <TH class="tone4"><SPAN class="white">帰属</SPAN></TH> <TH class="tone4"><SPAN class="white">痕</SPAN></TH> <TH class="tone4"><SPAN class="white">色</SPAN></TH> <TH class="tone4"><SPAN class="white">速さ</SPAN></TH> <TH class="tone4"><SPAN class="white">備考</SPAN></TH> </TR> <TR> <TH class="tone0"><SPAN class="color">1</SPAN></TH> <TH class="tone0"><SPAN class="color">2004</SPAN></TH> <TH class="tone0"><SPAN class="color">4</SPAN></TH> <TH class="tone0"><SPAN class="color">9/10</SPAN></TH> <TH class="tone0"><SPAN class="color">21:08:00</SPAN></TH> <TH class="tone0"><SPAN class="color">±5秒</SPAN></TH> <TH class="tone0"><SPAN class="color">UMa→Dra</SPAN></TH> <TH class="tone0"><SPAN class="color">-8</SPAN></TH> <TH class="tone0"><SPAN class="color">Vir?</SPAN></TH> <TH class="tone0"><SPAN class="color">無</SPAN></TH> <TH class="tone0"><SPAN class="color">白</SPAN></TH> <TH class="tone0"><SPAN class="color">S</SPAN></TH> <TH class="tone0"><SPAN class="color">視野の端で<BR>精度が悪い</SPAN></TH> </TR> <TR> <TH class="tone1"><SPAN class="color">2</SPAN></TH> <TH class="tone1"><SPAN class="color">2004</SPAN></TH> <TH class="tone1"><SPAN class="color">4</SPAN></TH> <TH class="tone1"><SPAN class="color">24/25</SPAN></TH> <TH class="tone1"><SPAN class="color">03:56:40</SPAN></TH> <TH class="tone1"><SPAN class="color">±5秒</SPAN></TH> <TH class="tone1"><SPAN class="color">UMi→Cas</SPAN></TH> <TH class="tone1"><SPAN class="color">-6</SPAN></TH> <TH class="tone1"><SPAN class="color">散在</SPAN></TH> <TH class="tone1"><SPAN class="color">無</SPAN></TH> <TH class="tone1"><SPAN class="color">青白</SPAN></TH> <TH class="tone1"><SPAN class="color">rR</SPAN></TH> <TH class="tone1"><SPAN class="color">5秒継続</SPAN></TH> </TR> </TABLE> <HR size="1"> <H3>■観測日記</H3> <H5>●4月2/3日</H5> <UL> 火球協定日を想定して、満月前の月明かりのある中で観測を強行。透明度は春にしては良かったが、火球クラスの明るい流星はなかった。 </UL> <H5>●4月3/4日</H5> <UL> 天気が下り坂で夜半以降の晴れは望めそうもないため、早い時間に観測時間をシフト。火球協定の練習も兼ねたが、特に異常なし。 </UL> <H5>●4月6/7日</H5> <UL> 火球協定日の観測。強い南風の影響で透明度は良いものの途中から怪しい雲が広がり２３時に観測打ち切り。お目当ての火球クラスの流星は１つもなし。 </UL> <H5>●4月9/10日</H5> <UL> ２１時０２分頃、－１等の見事なおとめ群がしし座南部に出現。さらに０９分頃－８等の大火球出現。どちらも最近にしては豪華な流星ではあったが、これ以外は特に目立った活動はなし。 </UL> <H5>●4月10/11日</H5> <UL> 薄雲が出現・消滅を繰り返し、条件としてはいまひとつ。うしかい座中部で群活動が見られたが、ここしばらく観測すれば少ないながらも確実に出現していたおとめ群は今回は見られなかった。 </UL> <H5>●4月16/17日</H5> <UL> 強い南西の風の影響で雲が湧き出し、２２時２０分で観測を打ち切り。おとめ群をはじめ、特に異常なし。 </UL> <H5>●4月20/21日</H5> <UL> 快晴ではあるものの、透明度はいまひとつ。こと群は極大前日にしてはそこそこの出現で、今夜に期待！ </UL> <H5>●4月21/22日</H5> <UL> 空の状態はさらに悪化し、低空のモヤと薄雲の襲来で１時間で切り上げる。こと群は３等級の流星が大半で明るい流星には出会えなかった。 </UL> <H5>●4月22/23日</H5> <UL> 昨日以上にモヤと薄雲の影響がひどかったが、貴重な晴れ間のため観測を強行。何とか１時間持ちこたえた。昨日同様３等級の流星が中心で期待の大物は出現しなかった。 </UL> <UL> しかしこと群において極大を挟んだ前後３日間全て観測できたことは記憶にないような・・・ </UL> <H5>●4月24/25日</H5> <UL> 西空に月があるものの、冬のようなすばらしい透明度で月明かりの影響は感じなかった。うしかい群・かんむり群とも活動が見られ、北東にまだ低いはずのこと群も長経路の流星を含めた活動を見せてくれた。 </UL> <UL> 明け方、リニア・ブラッドフィールドを捜索中に大火球を目撃しました。思ったより薄明が進んでいて、彗星は見つけられませんでした。薄明中に彗星を探すのはたとえ肉眼等級とはいえ至難の業ですね。 </UL> <H5>●4月30/1日</H5> <UL> 観測終了間際に４月うしかい群らしい流星が出現した以外は特に異常なし。 </UL> <DIV align="right" class="author">〔東の観測装置〕</DIV> <HR size="1"> <DIV align="right" class="jump">| <A href="../../index.html" target="_top">観測報告2004</A> | <A href="../../../index.html" target="_top">観測報告</A> | <A href="../../../../index.html" target="_top">観測</A> | <A href="../../../../../../index.html" 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