IC 1613 (DDO 8, Caldwell 51)

Telescope: Planewave 17" CDK reflector, 1940 mm FL
Camera: FLI-PL6303E, 3072 x 2048 pixels
Exposure: Lum: 6x3 minutes. Processed with PixInsight.
Location: Mayhill, New Mexico (Elevation 7380')
Image Center (J2000): RA 1h 04m 46s, Dec 2° 06' 46"

Dwarf irregular galaxy part of the Local Group about the same distance as M31 and M33. First resolved into stars in 1928. The galaxy is mostly free of cosmic dust which has permitted many Cepheid variable discoveries, some are visible in this image. RR Lyrae variables at mag 24 to 25 have also been discovered but are too faint for this image. 65+ stars within this galaxy are resolved in this image.


IC 1613 (DDO 8, Caldwell 51), Dwarf irregular galaxy part of the Local Group about the same distance as M31 and M33. First resolved into stars in 1928. The galaxy is mostly free of cosmic dust which has permitted many Cepheid variable discoveries, some are visible in this image. RR Lyrae variables at mag 24 to 25 have also been discovered but are too faint for this image. 65+ stars within this galaxy are resolved in this image., acquired with a remote telescope at Mayhill, New Mexico (Elevation 7380')

Object Label Identifier Notes
Galaxy G1 2MASX J01042269+0157268 Galaxy, mV=18.36, 0.4' x 0.2'
Galaxy G2 2MASX J01041782+0206568 Galaxy
Galaxy G3 2MASX J01044429+0204367 Remote galaxy seen through IC 1613
Star DR 1 NAME DR 1 Oxygen sequence Wolf-Rayet (WO) star, discovered in 1982, only 8 are known, mV=20.7. Surrounded by an HII region.
Star V20 [S71b] V20 Cepheid, mV=18.80
Star V22 [S71b] V22 Cepheid, mV=17.75
Star V39 [S71b] V39 Cepheid, mV=18.85

Click on the plate solved image to display annotations. 4' across IC 1613 is about 2,800 light years. Many stars across the face of IC 1613 are foreground stars but there are 70+ stars visible in this image that are confirmed members of the IC 1613 galaxy including 22 Cepheid variables. Yellow circles are Cepheid variables. Red circles are spectroscopic confirmations. The Green circle is DR 1.