A lunar eclipse occurs when the Moon passes directly behind Earth and into its shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned, with Earth between the other two. A lunar eclipse can occur only on the night of a full moon.
During a total lunar eclipse, Earth completely blocks direct sunlight from reaching the Moon. The only light reflected from the lunar surface has been refracted by Earth's atmosphere. This light appears reddish for the same reason that a sunset or sunrise does: the Rayleigh scattering of bluer light. Due to this reddish color, a totally eclipsed Moon is sometimes called a blood moon.
On 21st January 2019 the eclipse followed the timeline below:
P1 02:37 Moon enters Earth's penumbral shadow
U1 03:37 First contact with the umbral shadow
U2 04:41 Moon is totally eclipsed
UT 05:12 Greatest Eclipse
U3 05:43 Totality ends
U4 06:51 Last contact with umbral shadow
P4 07:48 Moon leaves penumbral shadow
Data captured 04:42, 21st January, 2018.
Single 1 second exposure at ISO400.
Skywatcher Quattro 200 CF
This image was processed in Pixinsight & Lightroom.
Histogram Transformation - To stretch the image, 3 small iterations.
Export as JPEG and import into Lightroom.
Increase Contrast (+15)
Reduce Highlights (-25)
Increase Shadows (+25)
Noise Reduction (Luminance) (+25)
Export final JPEG for upload.