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NGC891
Image Information
Quoted from SEDS:
From SEDS.org
Discovered by William Herschel in 1784.
NGC 891 is a fine edge-on spiral with a faint dust lane along its
equator. It was discovered by
William
Herschel on October 6, 1784, and
cataloged as H V.19. However, in the appendix to his first catalog,
he confused it with his H V.18 (M110,
NGC 205) when discussing the
discoveries
of his sister
Caroline
Herschel, in this case her entry No. 9; this remark was picked up by
Admiral Smyth
and later authors so that it was wrongly attributed to Caroline for a
long time.
Gilbert A. Esquerdo and John C. Barentine have
investigated NGC 891
in the infrared part of the electromagnetic spectrum, and suspect that
this galaxy might have a bar (and thus be of Hubble type SBb) which is
not seen in the visible image because of its edge-on orientation.
NGC 891 is a member of a small group of galaxies, sometimes called
the NGC 1023 group, which also contains NGCs 925, 949, 959, 1003, 1023,
and 1058 as well as UGCs 1807, 1865 (DDO 19), 2014 (DDO 22), 2023 (DDO
25), 2034 (DDO 24), and 2259.
Supernova 1986J was discovered in NGC 891 by van Gorkom, Rupen,
Knapp, Gunn on August 21, 1986 and reached mag 14 (see
IAUC 4248).
NGC 891 is contained in the
SAC 110
best NGC object list. It is also
Caldwell 23 in Patrick Moore's List. In the
RASC's
Finest N.G.C. Objects Objects list.
Edge-on spiral galaxy NGC 891 was featured in Jeff Bondono's
Masterpieces Messier Missed for December, 1995
NED
data of NGC 891
SIMBAD
Data of NGC 891
Publications on NGC 891 (NASA ADS)
Observing Reports for NGC 891 (IAAC Netastrocatalog)
NGC Online
data for NGC 891
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1600
800
Full
Version A
1600
800
Full
| There are 18/18/17 RGB - 20 minute and 20 -
20 minute luminance images
used in this LRGB image. A total of 24-1/3 hours
of data was used for this image. All data was
acquired using MaxImDl/CCD version 5.15 using ACP. Images
were reduced and saved in MaxImDl version 5.
Alignment, average combining, along with histogram stretching,
deconvolution, and HDRWavelets was done using Pix Insight. Photoshop CS 5 was used to create the JPG versions for web presentation.
The image data was collected between October 22-25, 2011 using ACP
version 6.2.
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Equipment and Location Information
| Date |
October 22-25, 2011 |
| Location |
Dogwood Ridge Observatory |
| Optics |
Optical Guidance Systems 12.5" RC |
| Mount |
Astro Physics AP1200GTO |
| Camera |
SBIG ST10-XME |
| Filters |
Baader LRGB
|
| Conditions |
Temperature middle 50s - low
40s with
moderate seeing. Transparency good to moderate. |
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