NGC/IC Project Restoration Effort
(This is a very very beta version)
Location and Magnitude
Right Ascension: 10:35:8.1
Visual Magnitude: 11.3
Discoverer: Herschel J.
Year of discovery: 1836
Discovery aperture: 18.3
Summary description: F, E, gbM, * 6·7 v nr
NGC 3366 = IC 2592. JH has a note: "The minute of RA is doubtful. The
written record makes it 47; but as this is impossible from the context, 37 is
assumed." Dreyer only noted in NGC that the RA was "very doubtful" and that
the bright star that JH saw nearby was not in two catalogues.
The actual RA is 27 (B1830); that is allowed in the context of the sweep. The
next non-stellar object in the sweep is NGC 3446 at RA 10 44 44.6 (B1830), and
the preceding object is NGC 3261 at 10 21 46.6 (again B1830). JH assumed a 10
minute error, but the actual 20 minute error still fits into the sweep.
The galaxy was rediscovered by Delisle Stewart on an Arequipa plate taken
about 70 years after JH's sweep. Stewart made no errors in this entry, but he
also did not note that NGC 3366 was missing. Perhaps the nominal position is
off the edge of his plate. Since he used a one-hour plate (number 3636), he
did not give the central position of the plate, but simply included the plate
number in a long paragraph of one-hour plates that he searched.
18" (2/19/09): faint, fairly small, elongated 3:2 SW-NE, ~0.6'x0.4' (viewed brighter core region). Located just 1.7' S of mag 6.1 HD 91805 and the combination of low elevation and the glare of the bright star severely hampered viewing the galaxy. At 225x I was able to place the star just outside the edge of the field which increased the visibility. This galaxy is located 1.3 degrees ENE of NGC 3256 and is probably part of the southern group Klemola 12 (NGC 3256, 3256B, 3261, 3262 and 3263 were observed from Costa Rica).