Comet Holmes on Nov 14, 2007
f=742mm prime focus
| Date & Time: | Nov 14 2007, from 20:50 to 21:13 JST(+0900) |
| composed 4shots with 1min. & 4shots with 4min. exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon with a conversion lens (f=742mm, F4.6) |
| Auto-guided with TAKAHASHI EM-200 Equatorial |
| Digital Camera: | Fujifilm FinePix S2Pro |
| Location: | Narusawa vil., Yamanashi pref. |
| Camera Settings: | Recording format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016) |
| CCD Sensitivity...ISO1600, White Balance...Auto |
Trimmed equivalent to f=1200mm
200mm telephoto (Comet Holmes & Mel.20)
| Date & Time: | Nov 14 2007, from 20:11 to 20:37 JST(+0900) |
| composed 6shots with 1min. & 4shots with 4min. exposed |
| Optical: | AF zoom-Nikkor ED 80-200mm F2.8 (f=200mm, Aperture: F3.2) |
| with IDAS LPS-P2-FF Light-pollution suppression filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial |
| Digital Camera: | Nikon D80 (Remodeled) |
| Location: | Narusawa vil., Yamanashi pref. |
| Camera Settings: | Recording format...12bit CCD-RAW, converted to 16bit TIFF(3872×2592) |
| CCD Sensitivity...ISO1600 |
Comet Holmes by fixed camera
| Date & Time: | Nov 14 2007, from 21:40 to 21:45 JST(+0900) |
| composed 3shots with 2min. exposed |
| Optical: | SIGMA 15mm EX Fisheye F2.8, Aperture: F3.3 |
| Digital Camera: | Fujifilm FinePix S2Pro |
| Location: | Narusawa vil., Yamanashi pref. |
| Camera Settings: | Recording format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016) |
| CCD Sensitivity...ISO800, White Balance...Auto |
The comet Holmes in that day with an apparent diameter almost same as that of the Moon has been positioned just east of alpha Per.
The comet has a visual brightness of about 3.0 or 3.5th magnitude, almost same when I observed on Nov 11.
The coma has almost no ionized gas, only detectable white dust composition looks like a jerry fish.
