本帖最后由 suhuasky 于 2013-12-9 03:19 编辑
1、Comet ISON
Taken by Alessandro DImai on December 7, 2013 @ Cortina dAmpezzo - Italy
Details:
Morning december 7th (06:18 ut):
try to take an image of comet ISON after perihelion, but in the 2 x 10sec (70mm f/2,8 lens) there is no evidence of the comet ISON (inside circle). Limiting magnitude +10,5. Comet definitively lost?
详细信息:
12月7日早晨(06:18 UT):
尝试拍摄ISON彗星近日点后的图像,但2×10秒(70毫米的f /2,8镜头)没有ISON彗星(内圆)的迹象。极限星等+10,5。彗星确定没了吗?
2、Comet ISON C/2012S1
Taken by Marco Fulle on December 7, 2013 @ Artvize (805m.a.s.l.), Slovenia
Details:
Comet ISON C/2012S1 field, limit magnitude 13, 7 Dec 2013 4h54m - 4h58m UT, 20x5sec exposure, Nikon D7000 @ 6400ISO, Nikkor f=85mm f/1.4, from Artvize (805m.a.s.l.), Slovenia
详细信息:
C/2012 S1 ISON彗星视场,极限星等13,2013年12月7日4h54m - 4h58m UT,20x5sec曝光,尼康[url=mailto7000@6400ISO]D7000@6400ISO[/url],尼克尔F =85mm f/1.4镜头,从Artvize(805m海拔高度),斯洛文尼亚
3、Comet ISON: Negative Report Down To Mag 16.5
彗星ISON:负面报告低于16.5等
Taken by Eric Allen on December 8, 2013 @ Observatoire du Cégep de Trois-Rivières, Champlain, Québec IAU #924
Details:
I tried to image what could be left of comet ISON and I unfortunately have to say that there is nothing that I can see down to about mag 16.5, not even a small condensation.
The first image is crop of a stack of 7 images of 30s each with a 40cm F4.4 newtonian and a STXL-6303E binned 2x2, tracked on the stars december 8th between 11h00 and 11h07 UT. No sign of the comet...
The second image is a stack of the same images BUT tracked on the comet with Astrometrica. Any leftover fragment would have appeared as points. Again, no sign of the comet...Sigh!
I know my sky backgrounds are not flat, I had problems with some trees (comet about 10 degrees above horizon...)
Th third image is the field of view of the images with TheSky (54 by 36 arcminutes), indicating where the comet should have been.
详细信息:
我尝试拍下 ISON 彗星的什么残余,我不得不很遗憾地说,直到16.5星等我没有看到什么,甚至没有一个小的凝结。
第一个图像是七张使用40厘米 F4.4牛顿和STXL-6303E binned 2x2 曝光30秒的图像叠加,12月8日11h00和11h07 UT之间对恒星跟踪,没有任何彗星迹象......
第二个图像是一个叠加相同的图像,但用Astrometrica对彗星跟踪。任何残余的碎片会以点出现。同样,没有任何彗星迹象......无语了!
我知道我的天空背景是不平直的,我有一些树的问题(彗星大约在地平线上10度...)
第三图像是用TheSky显示这图片的视场(54X36弧分),指出彗星应该在哪儿。
Details:
I combined more 30s images than my previous photo for a total of 14m 30s. December 8th between 11h and 11h20 UT. Still nothing.
详细信息:
我结合12月8日11h和11h20 UT之间更多30秒的图像,总共14分30秒, 仍然一无所获。
4、Comet ISON-Neg Rpt
Taken by Gary on December 8, 2013 @ Fort Davis, TX
ISON彗星-负面报告
Details:
Comet C/2012 S1 ISON field area taken with Canon T4i, 55mm f5.6, iso 6400, 5s exp with stars to ~9-10th mag. with negative detection of comet remnants/debris on 2013/12/08 UT 12:36. Color, bw and negative images and TheSkyXPro field chart.
详细信息:
佳能T4I,55毫米F5.6,ISO 6400拍摄C/2012 S1 ISON彗星视场,5S 曝光的星星到9-10等。2013年12月8日12:36 UT彗星残余/碎片检测是负面的。彩色、黑白和反相,TheSkyXPro视场图。 |