Venus Transit with H-alpha (Jun 6, 2012)


Changeover switch of taken time    


Solar constants: P...Polar angle, B0...Central latitude, L0...Central longitude
Date & Time: Jun 6, 2012, Times are displayed in image
Optical: Coronado SolarMax40, eyepiece projection with Naglar type5 16mm (f=1025mm, F26.0)
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Joetsu city, Niigata pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184 x 3456)
CCD sensitivity...ISO800



This page shows you chased images of the Venus transit on Jun6, 2012 with an H-alpha solar telescope. You can switch displayed image with different taken time by clicking on buttons above the image. These images show us a blacked circular Venus is moving on solar chromosphere.
The sun in that day had several large-scaled plages with NOAA numbers of #1493, #1498, #1499 and so on in northern hemisphere, the Venus passed just north of the active regions. You can also detect several prominences around solar rim. Moreover, the sun rotated about 3.5 degrees during 6.5 hours of transit, the movement of solar surface can be detected. Also some small-scaled flares occurred, you can see some parts of plages brightened.


Solar grid & active regions




Venus transit, 1st to 4th contacts

Comparison of White-light & H-alpha at 3rd to 4th contacts


Copyright(c) 2012 by Naoyuki Kurita, All rights reserved.
To top page To Moon & Planets index