沙鹿的星空

[yao]

器材:ED 22X70(未來會用25x100,4inchf10refracotor,C11...............)
時間:大部份是前5,6天所觀測;少數是約2星期前
天氣:狀況觀測前下午6點有下10幾分鐘的雨
         透明度definetly above avage
       NELM:about 4?(both eyes not fully correted for near sightness,or else it might just well above 4
a useful tool for me alone,yet it might be meaningful to whoever sees this report.To be
                 a suggestive of more precise,the outline of Ophiuph stars is deemed distinct,inclusive of   those more elusive ones,such as nu/omicron/xi.(one of those three only sporadically seen)
銀河:只要和無銀河的中天摩羯座相比,過中天的西下銀河仍易見延伸至天鷹座以上只是無法太清楚的分清濃淡
地點:bortle scale red room
       東海與弘光間(近弘光)
       120餘公分寬的可見南方天空陽台
         無直接光源干擾但有些許側方光
觀測方式:全程不用手電筒
首先是器材:ED 22X70(未來會用25x100,4inchf10refracotor,C11...............)
時間:大部份是前5,6天所觀測;少數是約2星期前
天氣:狀況觀測前下午6點有下10幾分鐘的雨
         透明度definetly above avage
       NELM:about 4?(both eyes not fully correted for near sightness,or else it might just well above 4
a useful tool for me alone,yet it might be meaningful to whoever sees this report.To be
                 a suggestive of more precise,the outline of Ophiuph stars is deemed distinct,inclusive of   those more elusive ones,such as nu/omicron/xi.(one of those three only sporadically seen)
銀河:只要和無銀河的中天摩羯座相比,過中天的西下銀河仍易見延伸至天鷹座以上只是無法太清楚的分清濃淡
地點:bortle scale red room
       東海與弘光間(近弘光)
       120餘公分寬的可見南方天空陽台
         無直接光源干擾但有些許側方光
觀測方式:全程不用手電筒
首先是盾牌座的區域此時已過中天2小時.I figure it is of much pleasure to scan through this region by means of nothing but a 22x70,this is a case in point where wide field APOV can truely uncover the grandure of the richichness of this untold beauty-the Scutum,as for all intends and purposes,the aera is littered with cluster,scattered with stars and, if easily seen at all?, riddled with some dark nebulae.這盾牌座的區域我用隨機尋天的方式將明亮的天體一一找出最容易的是
M11:它的星星密集區似乎是在西南方.至於要分辨形狀似乎很難下一次.我看看能不能分解出個別星星或中央的一顆7等亮星
M26:再其次亮度為M26.當然比起M11差的多,不過因為它剛好是8.0等.這8.0等算是一個雙筒鏡觀測的基準意義上就像肉眼極限星等的5.0等這類mark.還好8.0等在我看來just a piece of cake(pun intened).梅西爾中段亮度如果你的儀器&地點&經驗這三者加起來你還很難看到這就糟了
NGC6712:這個球狀星團絕對不叫做考驗.有時它甚至有比M26還亮的錯覺.不小的市視直徑加上不算小的表面亮度,位置亦不難找各位不要忘記它阿
除了這三個容易找且容易看到的深空之外其他有一些憑藉耐心應該有辦法在看到一些只是有一些似有非有的疏散星團還要在確認一次
note 1:It seems no denying,in this case,where there are more numerous star than you can count,it is advantageous to uterlize as wide a AFOV as is possible.
note 2:Gloublar cluster seems to be more readily made out from background than open cluster on grounds that the former has a  more brightness contrast set against background star.
note 3:Scanning the the Scutum in a relaxed fashion provide a better/more pleasurous way than purposely searthing for something seeningly significant,such as M11.
to be continue & many to come

[yao]

對了,其實我的22X70觀測幾乎都用手持(日後加以說明)

其實盾牌座的區域用高倍率大口徑雙筒觀測是很過癮的
由於盾牌座是個小星座
因此我是用掃瞄的方式
將盾牌座其中的亮天體一一找出
除了上述3個亮天體外
其他都比較暗些
不過我可見M11附近還是有些天體還是有辦法看到
只是要再確認幾次
或是等待更好的透明度
或是再把觀測優質化一些(日後加以說明)

接下來是射手座區域以下(有些M24北方天體不在射手座)
M24:Usually I start with this swath of stars approximately 1.5 degrees in span.It is thought of by me as the geometric center of heavenly bodies within reach of a mere 22x70.M24,hard it is not,but rather magnificient/imposing it is.If memories serves me well,someone counts up to 100 plus stars with ease using 20x80 or something like that.I have not tried this feat,but it might be doable but seriously under this circumstances I ind of doubt it.Nevertheless,diffuse nebulae in and around NGC6603 is a easy pray,using of course nothing bot a humble 22x70.What a sight it is and indeed it is and it was,but will it still be so,that still hangs in the balance considering the ever glowing and growing LP(not pun intended) found here.
M24的雲氣用22X70是輕而易舉的
星星加雲氣使M24成為夏天最壯觀的天體
聽說有外國人用大望遠鏡花1.5小時看個別星星的顏色
不過我沒特別去注意
說實話22X70應該也辦不到
M24往北方依序可見M18,M17,M16
往西南方可見M8,M20,M21(M23 not far away)
往東南方可見M22(M28 not far away)

[yao]

往東方可見M25

M24之後向北首先映入眼簾的是
M18:單就M18本身來說是還蠻亮的(至少也知道比8.0等的M26亮了不少)
          不考慮周邊的星星其實也蠻漂亮(M25的周圍有半圈以上的亮星將它包住,很特別)
        The cluster s reluctance to fully resolve into diamond specks would be in vain through small       scopes at medium power,at lease it is what I thought following my initial and repeat but not so serious obervation.

M17:The famous swan-shaped/check mark asterim is hard or next to impossible to tell.Larger in   comparison to M16 and in particular M18.Smaller in area,it to a great extend more than make up this by furnishing us the higher surface bright than M8.The 惠更斯 area in the heart of the M42 is ever
 higher than it .It is almost safe to say it is the second highest surface brightness diffuse nebulae,trailing by M8.I have in hand several LP filters,excluding H-alpha,which seems promsing to this to say the least.
Condensation to SW,bright and odinarlily bight regions easilly distingushed.Nebulae easily seem.
Hard to tell its indivisual members???I guess not.
下次我拿光害濾鏡試看看(Oiii pits sagainst UHC)
以後有機會仔細看看能否以肉眼直接看到M17(M8光其中的疏散星團應該就比M17亮)

M16:Judging from data accquire,all I perseived is nothing but open cluster embedded in nebulosity.
The open cluster is, howeer,still more than worth being looked at.
Not easy to see its indivisual members???I guess not.




     
   

[yao]

M25,M8,M20,M21,M23 (I will find some time to describe them)

22x70 teams up with/in conjunction to 22x60

第一組
天蠍座NGC 6638 非常易見(sizeable,graddually brighting towards the center)
相比天蠍座NGC 6541 未看但因該只遜半籌

第二組
天蠍座NGC 6281 非常易見(about exactly a  dozen stars not hard to be seen,lacks rest of background stars,not sure if  sighs of  background grow or not)
相比天蠍座NGC 6242  易見 略遜一籌(maybe the same size as M26,not round,rectangular in shape)
天蠍座NGC 6231  北半天球珠寶盒 the northern gewlery box imcrediabe/marvelous/fabulous/unmatched
but sometimes stars too bright to my taste
天蠍座Cr 316 imcrediabe/marvelous/fabulous/unmatched in another fashion,struts its unmourous 10th-magnitude stars,must be larger than 1 degree, 1.5 degree reasonable)

第三組
M19 next time I will look for its oblate shape(of all messier gloublars)
NGC6293 surely be detected halh of,if not most of duration,locationeasily confirmed
NGC6284 border on invisibilty,seems further more precise location will fish it out

第四組
M9 harder to notice than M19
MGC6356 a lot like NGC6293(surely be detected halh of,if not most of duration,locationeasily confirmed)
NGC6342 same as NGC6284,maybe harder than NGC6284,needs better sky or more work

more on Scorpious..........

[星空旅者]

你的手真穩，我用12x50就已經不太能接受了~~~

[Zoar Chuang]

一起來挑戰梅西爾馬拉松吧~
 

[yao]

先跳tone一下至M33

前兩天半夜在自家透天頂樓看仙后座;M31/32/110;M33等星體
其中M33由三角座西南角的阿法主星向西掃約2度可見兩顆亮星
再由兩顆亮星向西北西掃約2度可見一菱形的4顆亮星邊長約一度多(比兩顆亮星約暗1至2等)
這4顆亮星北方頂點的那一顆較其它4顆約暗一個星等

在這4顆亮星之中
已不只是隱約可見一團霧氣
霧氣真的有一直超過滿月的大小
雖然很久沒拿22X70看滿月的大小
但霧氣真的有一直有接近這4顆亮星圍成的一半面積
反正只比M31小
單位面積亮度可能只有M31核心的1/4
但單位面積亮度可能有M31邊緣的2至3倍

M33 is definetly seen as moderately bright, but is so gauged as it is as high as +70 degrees and more.

偶爾可見似乎東南還是西南邊較亮
反復看了約10次
一次約1至5分鐘
每次都可見M33

M33在沙鹿真的滿令人驚豔的

[yao]

上個月左右看的幾個天體

M15:以飛馬座epsilion為起點很容易找,而且很容易看到東邊有一顆6等星.屬於較亮的球狀星團,視直徑也較大.

        M15中間有一個行星狀星雲需要大口徑才能看出來

M2:這個球狀星團還是以飛馬座epsilion為起點才比較容易找
       飛馬座epsilion為起點往南35度可見三顆(5至6等星)飛馬座3,4,7呈等腰三角型
       飛馬座3,4,7往南4度可見兩顆(5至6等星)寶瓶座25,26
      寶瓶座25,26為基線往南南西2度可見M2
     
     不建議由寶瓶座beta出發來找
     
      M2約65等整個星團比亮度相近的M15小的多
      也因此變成一個小而亮的球狀星團
      以球狀星團而言單位面積亮度非常非常的亮
      比M15好看

M30:在視野3度的22x70中很容易看到一圈魔羯座亮星33,35,36,zeta....
        From there sweep your field toward 3 degrees ESE, M30 is cuddled by a 6th magnitude star   
         Capricornus 41 0.? degree to the east.
        在夏季銀河之射手座M8可略見的晚上
          M30呈現出非常明確的中心區與邊緣區
          中心區直徑約M30的12至13
        邊緣區直徑約M30的12至23
        中心區亮度surface brightness per aera約為邊緣區2倍至3倍
          非常的超寫實
          比M2還好看
          但只要沒有這麼理想的條件下只見的一個mill-of-the-run球狀星團m30

[yao]

更正: 中心區直徑約M30的1/2至1/3
        邊緣區直徑約M30的1/2至2/3

[曹大貓咪]

下次若看完整個梅西爾可以出本小冊,給大家福利!

[yao]

補充資料/最近自己巡天時找到的(拿22X70去看很好看的兩個asterim)
1 equilateral triangle asterim
   在M11正南邊1.5度處有一個正三角形(約18h51m -7.50degree)
   相似度95/100至100/100
2 arrowhead with arrow shaft asterim
   另一個很像箭簇及箭桿的星星集合好像在寶瓶座(下次在仔細看看到底在那裡)
   相似度90/100
   拿22X70自己去找看看特殊asterism是很有趣的

[peter]

M11
http://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=20005.0

[yao]

仙后座疏散星團
1 NGC7789(white rose cluster)
   易找度 8.5/10
   觀測易難度  6/10至8/10
   可看度 7.5/10;暗空下8.5/10;.大口徑加暗空9.5/10(例如12吋可見1000顆星,8吋可見300顆星)
    這個疏散星團受光害影響程度滿大的.NGC7789可以從微微可見至unmistakenable/third of the Moon   diameter
   至於其中星星是完全無法分解
    由於我這裏北天極附近光害較重,之前在大雪山13公里處的7789是好看多了.
    7789是北半球觀測者前10名好看的疏散星團(通常排在M35,M36,M37,M38之後)
  
2 NGC129
   易找度 8.5/10
   觀測易難度  6/10
   可看度 7.5/10
   會有些微的不確定看到性.微微的光.星團可持續分解3顆星.視直徑約M26或稍大於M26.絕對比M26暗(面積大加光害重)

3 NGC225
   易找度 8.5/10
   觀測易難度  6/10
   可看度 7.5/10
   會有些微的不確定看到性.微微的光.星團不可分解星星.視直徑約與NGC129相當. 看久了比較容易看出是疏散星團.

4 NGC457(owl cluster)
  易找度 7/10(真的有一定以上找不到的機律)
  觀測易難度  9/10
  可看度 8至9/10(條件稍差時8/10)
  這個星團稱為owl cluster,ET cluster不過我個人感覺應稱它是鬼雙子座星團ghost of Gemini
  把貓頭鷹和ET的詭異加上雙子座的輪廓(頭手腳腰都有)想像在一起
   比較不像ET
  如果條件很好時頭手腳腰不會很費力的觀測出來
   貓頭鷹的兩顆一藍一橘的眼睛太好看了
   絕對是22x60這種雙筒的showpiece

5 M103
  易找度 9/10
  觀測易難度  8/10
  可看度 8/10
  雖然說亮,但只分解出幾顆亮星.但是觀測條件變好時視直徑感覺有大上一倍,這時有八成的可看度.

6 NGC663
  易找度8.5/10
  觀測易難度  8/10
  可看度 8.5/10
  Cladwell Object其中之一,最少可分解接近十顆星,未分解的疏散星團的背景還不錯
   真的蠻好看的疏散星團(但有輸NGC457)
   22x60不知能否分解20顆以上星星(沙鹿或大雪山)?

7 M52未看

 


  

[yao]

補充資料/最近自己巡天時找到的(拿22X60去看很好看的一個asterism)
3 Grand Pusedo-Christmas Tree asterism 大(偽)聖誕樹星團
   船尾座zeta北北東方5度處有一個正三角形(約centered at 8h15m -35.9degree)
   
   好找度90/100  目標離超亮的船尾座zeta不遠+離4等亮的船尾座q更近+NGC2546可幫助定位
   相似度85/100至95/100  把亮星船尾座q弄到視野之外就至少90/100 相似
   可看性95/100  都已經標示Grand了
    特徵
    適合倍率30倍以下(另外用50度以下窄角目鏡觀測把亮星船尾座q弄到視野之外比較像 ^-^也比較好看  )
   右下方(正向)或樹的西南方有兩組交會的一對亮星(2x2=4),左上方亮星為船尾座os,這4顆亮星把它想成裝飾品吧
   樹的上方一顆星私儗為避雷針(約centered at 8h14m -35.2degree) 
   其他
    NGC2546(視直徑約40秒)用22X60至少有十幾顆9等星可見-*不過沒特別注意它就是了

[yao]

前幾個星期用22x60掃過一次M48

哇,沒想到M48星星數(沒仔細數;約50 plus;易見;亮度平均;無集中)竟然有可能比M35多(但極有可能M35星星數比較多)
另外,M48也比想像中的好看(如天使塵/angel dust)
看完後還滿high的

PS:之前的有一些要補充;有一些要修正
PS:其餘觀測近期補充