NGC/IC Project Restoration Effort
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NGC6125
Basic Information
Location and Magnitude
Right Ascension: 16:19:11.2
Declination: +57:59:5
Constellation: DRA
Visual Magnitude: 12.0
Historic Information
Discoverer: Swift L.
Year of discovery: 1886
Discovery aperture: 16.0
Observational
Summary description: pF, pS, lE
Sub-type: E0
Corwin's Notes
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NGC 6125 = NGC 6127 = NGC 6128. There are only two galaxies in this area (the
other is NGC 6130), but four NGC numbers. NGC 6125 = H II 810 is the brighter
of the two, so is almost certainly the galaxy that WH saw, though he must have
made an error of 20 arcmin in reading the NPD (see Dreyer's note in the
Herschel Papers, 1912). Herschel's original NPD is coincidentally identical
to that of NGC 6130; this has led Reinmuth to suggest that NGC 6125 = NGC
6130. But the RA's are 51 seconds different, and Dreyer does not mention any
problem with the RA's in Herschel's sweep. Dreyer's conclusion that the
minutes of NPD recorded by Herschel (59) should be 39 is the most reasonable
explanation.
Swift has two objects near the correct place for the brighter galaxy, both
from his 4th list, but found about a week apart on 28 June and 6 July in 1886.
The descriptions of these two are similar ("pF, vS, R" and "pF, pS, R, BM"),
and also agree with Herschel's description ("pF, pS, lE"). Therefore, I am
almost certain that the three observations all refer to the same galaxy.
A third object found by Swift, also on 28 June 1886, is preceded by a bright
star (SAO 29889) that he noted in his description; this verifies the
identification as NGC 6130. The star is not mentioned by Herschel, further
evidence that he saw the brighter northern galaxy and not this one.
Finally, see NGC 6191 where NGC 6127 (found the same night as N6191) figures
in the story of that missing nebula.
Steve's Notes
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NGC 6125
See observing notes for NGC 6127.