Arp 29

ARP 29 2015 Aug 22

Object:            ARP  29   (NGC 6946) Date:               2015 August 22
Peculiarity:    Spiral with one heavy arm.
Constellation:           Cepheus Time & altitude: 22.00 UT     80º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                20h 35m Transparency (5 high):                   2/5
            Dec:                +60º 09 Telescope:     0.5m f4.1 Dob.
            Magnitude:    8.8 Eyepiece:      8mm Ethos      x260
            Galaxy size (mins):  12’ x 10’ Filters:            None.


Huge, I expect it would be a fine sight in better conditions. It is evidently a face-on irregular spiral. From a prominent non-stellar core the most obvious arm curves away E, passing a foreground star. A second shorter, less apparent, arm heads N. I cannot make out separate arms to the S or W. This area has the appearance of an extended halo with an unusual concave edge in the SW.