Aldebaran Occultation on Nov 16, 2016

 

Left: Disappearance   Right: Appearance

Date & Time: Nov 16 2016, Times are displayed in images
Optical: BORG 60ED, afocal method with LV25mm eyepiece (14×)
Synthesized focal length f=854mm (equivalent f=6100mm in 35mm film format)
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Video Camera: Canon iVIS HF-M41
Location: Hitachi city, Ibaraki pref.

Camera Settings: Mode...MXP(24Mbps), Aperture value auto
Lens...f=61mm (equivalent f=436mm in 35mm film format), Stop: F3.0




Before dawn of Nov 16,2016, the occultation of Aldebaran, alpha Tau, could be observed at Japan under good conditions. The red eye-star of bull was hidden by the moon two days later of its full moon. The images in this page have been displayed by turning the north direction downward, left and right sets of images indicate the disappearance and appearance of Aldebaran, respectively. The large images show you 30 seconds prior to disappearance and later of appearance, respectively. And the continuous magnified images have paralleled moments of disappearance and appearance with unit of single flame (1/30 seconds, numerals with "f" denote the flame numbers).
Although the image of disappearing Aldebaran can hardly be detected due to the glare of moon, we can see that the Aldebaran is getting brighter during three flames when appears from the dark edge of moon. According to rough estimation, the movement time of moon on the celestial sphere has about 1/20 to 1/30 seconds for the apparent diameter of Aldebaran (0.021"). There is a possibility that the digital video camera could record the "partially eclipsed" Aldebaran with a rate of 30 flames per seconds.





Saturnian Occultation(Oct 16, 1997)

Antares Occultation(Mar 31, 2005)


Copyright(c) 2016 by Naoyuki Kurita, All rights reserved.
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