IC 2664
DSS image of IC 2664
Overlaid DSS image of IC 2664, 60' x 60' with north at top and west to the right

Aladin viewer for the region around IC 2664

Type  Double Star
Magnitude  
RA (2000)  11h 15' 38.4"
Dec (2000)  12° 33' 46" N
Constellation  Leo
Description  F, vS, lE 80deg , bM
Observing Notes

Harold Corwin

IC 2664 is a double star, confirmed on the print of the original plate. Wolf's position is actually closer to the eastern of the two stars, so that is often taken as the IC object. But the images of the two are blended on the print, so I suspect that both should bear the IC number.

Note, too, that the eastern star has a very large proper motion, +166 mas/yr in RA, and -121 mas/yr in Dec, now carrying it away from the western star. On Wolf's plate, the two stars are almost merged, while on the DSS2 images, the stars are about 22 arcsec apart. The motion can actually be seen by "blinking" the red and blue DSS2 images. In spite of the different scales of the images as seen in DSS1 and DSS2, the motion is even more clearly seen by "blinking" those. The position I've adopted from UCAC4 is for the date of observation, claimed to be exactly 2000.0 in the SIMBAD version of the catalogue. Even if that is merely a nominal epoch, the real one is close enough to it to pretty accurately represent the current position of the star.

- IC Notes by Harold Corwin
Other Data Sources for IC 2664
Associated objects for IC 2664
Nearby objects for IC 2664
Acknowledgements and Credits...

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

Positional and some physical information is from the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

Additional object data from the SIMBAD database, operated at CDS, Strasbourg, France.

The Digitized Sky Survey was produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope.

Dark nebulae data from E.E. Barnard, A Photographic Atlas of Selected Regions of the Milky Way. Ed. Edwin B. Frost and Mary R. Calvert. Carnegie Institution of Washington, 1927

Object descriptions of Rev. Webb from Celestial Objects for Common Telescopes sixth edition, Rev. T.W. Webb, 1917, edited by Rev T.E.Espin.

NGC & IC object notes from Harold Corwin licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. Additional supplementary material for NGC and IC catalog objects from Courtney Seligman with non-commercial use allowed, found at https://cseligman.com

IC 2664