As we all know that most celestial bodies rotate in an elliptical orbit. The Sun, Earth, and Moon all three are no exceptions for this. So, in an elliptical orbit, the distance between Sun and Earth or between Earth and Moon are not same always. The distance varies from time to time. The point of distance which is very farthest between two bodies is called as Apogee while the nearest point is called as Perigee.
On 31st January 2018, the Moon will be at Perigee making it 14% larger and 30% brighter. This does not indicate the 'blue moon' because of its size. Scientifically, a blue moon is the second full moon that occurs in a single month. Since the moon is at its Perigee and it is the second full moon, it is called as the super blue moon. And on this blue moon day, there is a second total lunar eclipse. The lunar eclipse has characteristic red tinge on the moon which is called a blood moon and hence today it is called as 'super blue blood moon'.
In India, this celestial event will be seen at different timings in different regions.
North - East India: 4:21 PM to 5:18 PM
Western Coast of India: 6:21 PM to 7:37 PM
Rest of the India: 5:18 PM and 6:21 PM
This event can also be witnessed in other countries such as Africa, Australia, Siberia, Northwest USA and Canada, Europe, and South America.
There are no particular precautions need to be taken while witnessing a total lunar eclipse. Unlike the solar eclipse, there is no damage to eyes if viewed without protection as the moon does not emit any harmful ultraviolet or other harmful spectra. You can view with the naked eye without any hesitation.
Dr. V. Shashikanth