Arp 99

ARP 99 2015 Sep 9

Object:            ARP    99

(NGC 7550 group, Hickson 93)

Date:               2015 September 9


Peculiarity:    Spiral with elliptical galaxy companion on arms.
Constellation:           Pegasus Time & altitude: 21.05 UT   44º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                23h 15m Transparency (5 high):                   2/5
            Dec:                +19º 01 Telescope:     0.5m f4.1 Dob.
            Magnitude:    12.2 Eyepiece:      8mm Ethos      x260
            Galaxy size (mins):  1.4×1.2 Filters:            Lumicon Deep Sky.


Strong E winds drawing polluted air in from France/Germany. The dirty air is aggravating light pollution. Milky Way only just visible in the zenith. Three galaxies in this Arp object. NGC 7550 is round with a non-stellar core. NGC 7549 (13.7m) is an inconspicuous oval. NGC 7547 (14.7m) is a tiny haze, maybe round, maybe oval.