
Observer's Corner for April 2019
M-87 (NGC 4486) and the FIRST IMAGED BLACK HOLE
By Professor Hal Jandorf




On April 10th, the first image of a Black Hole was released by scientists to the media.
Eight radio telescopes located all over the globe worked together to compile the image pictured here.
The black hole is a massive one centered in the huge elliptical galaxy in Virgo.
A gas “jet” emerging out from the central black hole has been observed for many years and is also a clue to the source.
I took the photo of the large swath of the sky last year (2018) containing a cluster of galaxies called “Markanian’s Chain”.
The brightest galaxy in the group is M-87. I used my 4 inch Explore Scientific Triplet Refractor, f/7 and with a FL of 714mm.
The exposure was 90 seconds at ISO 2000 with a Sony A7 Mirrorless Digital Camera shot at Borrego Springs last May.
This May, we will return to the desert and concentrate on M-87 with more exposure times to pick up the “jet” to show it more prominently.
M-87 is an easy galaxy to acquire (if you have a light polluted-less sky). It is large and bright at 9th magnitude.
The location is R.A. 12h 31m, Dec +12.4 degrees. Distance is 55 million light years.
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