NGC 6589
DSS image of NGC 6589
Overlaid DSS image of NGC 6589, 60' x 60' with north at top and west to the right

Aladin viewer for the region around NGC 6589
IC 4690

Type  Bright Nebula
Right Ascension  18h 16' 52"  (2000)
Declination  19° 46' 41" S
Constellation  Sagittarius
Description  D*center eF, pL neby
Classification  E
Observing Notes

Harold Corwin

IC 4690 is probably identical with NGC 6589 (which see for a problem of its own). If so, Barnard misidentified the star in his note published in AN 4239. There he says "The two stars BD-19 4881 and BD-19 4946 are closely and densely nebulous. The nebulosity about BD-19 4881 is somewhat extended nf and sp."

In order to make this match the field he is describing, the star number BD-19 4881 has to be replaced in the first sentence with BD-19 4940, and then with BD-19 4946 in the second. The nebula around BD-19 4946 is NGC 6590 (which see) = NGC 6595 = IC 4700; it is elongated as Barnard describes, while the nebula around BD-19 4940 is nearly circular. That leads to my thought that Barnard's second mention of BD-19 4881 is actually a reference to NGC 6590 rather than NGC 6589. This in turn suggests that IC 4690 is NGC 6589.

In any event, there is no nebulosity around BD-19 4881; that star is nearly seven minutes of time west of -19d 4946. Barnard's mentioning it is almost certainly a misidentification on his part.
IC Notes by Harold Corwin

Harold Corwin

NGC 6589 may also be IC 4690 (which see for more discussion). Swift's position for NGC 6589 is about 36 seconds of time off, a mistake corrected by Barnard, and included in the IC1 Notes. Ironically, Barnard is also responsible for a mistake of his own which makes the identity with IC 4690 probable.

Also see the discussion under NGC 6590 and IC 1283 for more on this field.
IC Notes by Harold Corwin
Other Data Sources for NGC 6589
Associated objects for NGC 6589
Nearby objects for NGC 6589

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NGC 6589