Messier 87

Arp 152 2017 May 1

Object: M87 (Arp 152) Date:               2017 May 1
Constellation:           Virgo Time & altitude:   23.20 UT           47º
Catalogue data: Seeing (5 high):                               4/5
            R.A:                12h 31m Transparency (5 high):           3 or 4/5
            Dec:                12º 24 Telescope:     0.5m f4.1 Dob.
            Magnitude:    8.6

Eyepiece:                  17mm Ethos    x120

8mm Ethos    x260

5mm Clavé    x415


            Galaxy size (mins):  8 x 7 Filters:            None.


Transparency is variable due to haze. There is a lot of moisture in the air, with patches of ground mist in the field. My back is to a 5-day-old Moon about 10º high, low in the NW.

M87 is a prominent, round galaxy with a large, bright core. There is no structure visible. All three magnifications gave a good view. Unable to detect any hint of the jet. The top magnification should be sufficient, probably need much better conditions. Other Virgo cluster galaxies are nearby. That in the drawing is NGC 4478 (12.6m).