NGC 2000.0 Corrections
Some minor corrections to the original NGC 2000.0 have been included in our
- NGC 2287 = M41 position was corrected from
RA 6:47.0 to 6:46.0; thanks to M. Ferrio for reporting this error (probably
- NGC 2736 was erroneously classified as
a galaxy, while it is actually a nebula and part of the
Vela Supernova Remnant.
- NGC 2818, a planetary nebula in an open
cluster (NGC 2818A), was erroneously described as a globular cluster in NGC
2000.0 - probably a reading error during the compilation process of the NGC
2000.0, caused by the similarity of the symbols.
Thanks to Louis Marchesi for pointing us to this error!
We now follow the various descriptions and have the planetary nebula as
NGC 2818 = GC 1801 = h 3154A = Dun 564A (= PK 261+08.1, He2-23, ESO 372-13),
and the open cluster as NGC 2818A = GC 1801A = h 3154 = Dun 564.
- NGC 6540, classified as an Open Cluster in
the NGC 2000.0, has been identified with the Globular Cluster Djorg 3 or
Djorgowsky 3 (Bica et.al. 1994).
- NGC 6811, open cluster in Cygnus, is
actually at a slightly different position and larger than in the NGC 2000.0;
position shifted from RA 19:38.2, Dec +46:34 to RA 19:37.3, Dec +46:23, size
increased from 13' to 15'.
Thanks to Wolfgang Renz for this update!
- IC 1257 has been identified as Globular
Cluster (Harris et.al. 1997).
Thanks to Barbara Wilson for communicating this to us!
- IC 3601 has some dubious fame for being
classified as "Photographic Plate Defect" in NGC 2000.0, based on a finding
by Dorothy Calson (1940), who classifies this
object as not found, and "a defect on the plate where it was originally found
by Frost, Harvard Annals 88" (Frost 985). However, as found by
Malcolm J. Thomson (2005), there is a galaxy in
Frost's position (later cataloged e.g. as PGC 165275, VPC 1124, and
[DCY96] 345), which is now considered as IC 3601.
- E. Bica, S. Ortolani, and B. Barbuy, 1994.
The globular cluster NGC 6540.
Astronomy and Astrophysics, vol. 283, no. 1, pp. 67-75 (03/1994)
- Dorothy Carlson, 1940.
Some Corrections to Dreyer's Catalogues of Nebulae and Clusters.
Astrophysical Journal, Vol. 91, pp. 350-359
- William E. Harris, Randy L. Phelps, Barry F. Madore,
Olga Pevunova, and Brian A. Skiff, 1997.
IC 1257: A New Globular Cluster in the Galactic Halo.
Astronomical Journal, Vol 113, p. 688 (Feb 1997)
- Malcolm J. Thomson, 2005.
IC Research Database: The Survey - List of Corrections.