IC 4018
DSS image of IC 4018
Overlaid DSS image of IC 4018, 30' x 30' with north at top and west to the right

Aladin viewer for the region around IC 4018
SDSS J125957.44+402919.3

Type  Galaxy
Magnitude  15.5
Size  0.3' x 0.2' @ 10°
Right Ascension  12h 59' 57.4"  (2000)
Declination  40° 29' 19" N
Constellation  Canes Venatici
Observing Notes

Harold Corwin

My first sweep over this had it as a galaxy with a star superposed. Then, I took a second look at it and concluded that it was just two stars. However, during the IC NED load in 2005, I found that the northern "star" is a 2MASS extended source as well as a MAPS galaxy.

So, looking at DSS2, and comparing it with the print of the original plate, it is clear that the IC object is a galaxy with a star about 25 arcsec to the southeast. I suspect I had the wrong objects on the POSS1 prints the first time around, and misinterpreted the overexposed images the second time around. I hope I have it right now -- spectra of these things will tell.

SDSS clearly shows the northern object to be an Sab galaxy with a redshift of 0.0714, and the southern object to be a Galactic star.
NGC Notes by Harold Corwin
Other Data Sources for IC 4018
Associated objects for IC 4018
Nearby objects for IC 4018

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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IC 4018