Arp 152

Arp 152 2017 May 1

Object: ARP 152 (M87 NGC 4486) Date:               2017 May 1
Peculiarity:    Galaxy with jet.
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, and jet 25 secs in length 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).