NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4160
![](Images/negative_NGC4160-ngcicproject.jpg)
Basic Information
Location and Magnitude
Right Ascension: 12:12:11.6
Declination: +43:44:18
Constellation: CVN
Visual Magnitude:
Historic Information
Discoverer: Bigourdan
Year of discovery: 1886
Discovery aperture: 12.4
Observational
Summary description: Neb * 13m
Sub-type: NF
Corwin's Notes
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NGC 4160. Bigourdan has two accordant observations of this object on 27 May
1886 which place it 12.87 seconds east and 1 arcmin 24.8 arcsec north of "AG
Bonn 8386" = SAO 044068. However, there is nothing there. A quick glance
at the POSS1 shows another star about 35 seconds following and 40 arcsec north
with a faint double star north following. The DSS gives the 1950 position of
the double as 12 09 31.0, +44 00 49. Assuming that this is Bigourdan's
object, and that he misidentified his comparison star, I reduced his
observation. The resulting position is 12 09 41.0, +44 00 59. The 10 second
and 10 arcsec differences are striking, but are difficult to understand given
that Bigourdan read his micrometer in terms of position angle and distance and
later reduced them to RA and Dec offsets.
Since there is still nothing at Bigourdan's place (assuming the mistaken
identity for the comparison star), I'm tempted to assume some kind of error in
his observation leading to the digit errors. But so far, I've not been able
to find it.