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NGC 3621
Bennett 46
ESO377-G037
RA 11:18:16
Dec -32° 48.8'
Gal |
Discovered in 1790 by William Herschel (H
I-241): "cB, E 70 degrees np-sf, vgbM, 7' long, 4' broad, within a
parallelogram."
Dunlop 617: "a very faint pretty large
nebula, about 2' broad and 4' long, very faint at the edges. The brightest and
most condensed part is near the south following extremity; a small star is
involved in the north preceding extremity, and there are two small stars near
the south extremity, but not involved."
h: "pB, vL, oval, vgvlbM, resolvable, 5'
long, 3' broad."
Hartung notes: “lying in a trapezium of
four stars in good contrast with a scattered star field is this conspicuous hazy
ellipse about 5’ x 3’ in pa 160 deg, rising to the centre broadly . .
quite easy, though faint, with 7.5cm.”
Houston includes this galaxy in his Hydra
Hysteria. He calls it a "big spiral galaxy about 10' diameter and 10th mag.
It lies about 1.5 degrees east-southeast of a small triangle of 6th and 7th mag
stars."
Steve Coe (1992, The Deep-Sky Observer, Webb
Society, Issue 1) observing with a 17.5-inch f/4.5 at 100x notes: "B, L,
elongated, much brighter in the middle, seen in finder and 10x50 binoculars,
nice."
Tom Lorenzin: “10.6M; 5' x 2' extent;
large featureless ellipse; !good supernova prospect!.”
Included in the CCD-atlas of Ryder S.D. &
Dopita M.A. (1993) “An H-alpha Atlas of Nearby Southern Spiral Galaxies”
Astrophys.J.Suppl. 88, 415. They note: “This is another comparatively
poorly studied galaxy despite having a lagre angular size and abundance of H II
regions. One prominent arm extends southward from the small bulge and carries
some of the most luminous H II regions in this galaxy, but once again, there
seems to be no counterpart on the opposite side.Most of the rest of the H-alpha
emission comes from the next arm outwards. Rifts of dust criss-cross the disk,
but at this moderate inclunation (about 67 degrees0, it does not seem likely
that such dust could conceal any significant H II regions on the far side of the
disk.”
Other names: “UA232,E377-37”.
Inclination: (face-on, in degrees) 53 Total photoelectric blue mag 10.18 Total
colour index .62 Logarithm of the angular diameter D25 (arcminutes) 2.09 Blue
photographic magnitude 9.56 This galaxy is included in a sample of galaxies with
velocity less than 500km/s with respect to the centroid of the Local Group.
[Nearby Galaxies. Schmidt K.-H., Priebe A., Boller T. (Astron. Nachr. 314, 371
(1993))]
11x80: Picked up this bright
galaxy readily. It appears mottled, showing the involvement of faint stars. It
is readily seen as an elongated (cigar-shaped) patch, which grows with averted
vision. (suburban skies) [AS] |
