- Local Group Galaxy
Asteroid 1998 FV67
Galaxy in Cetus
Instrument: 12.5" f/5 Home made Newtonian
Platform: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Cooling
Guider: SBIG ST4
Exposure: LRGB = 120:20:20:20 (RGB Binned 2x2)
RGB Combine Ratio: 1: 1.05: 1.11 (G2V)
Filters: AstroDon RGB Tricolor
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing FWHM = 5.0 arcsec (Maxim DL - 10min subframe), Transparency 7/10
Outside Temperature: 35 F
CCD Temperature: -30 C
Processing Tools: Maxim DL, Photoshop, PixInsight, CCDOps Debloomer.
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faint galaxy is highly asymmetrical in appearance. The entire
galaxy fills the short dimension of this frame, yet the brightest
area is above center. Its always an amusing surprise when objects
don't appear as plotted on the atlas! IC1613 is a 10th magnitude
integrated brightness spread out over a quarter degree of sky.
So faint is this object that I had to do a 1 minute exposure
just to see if it was even there in the framing shot. Most star
images in this IB(s)m galaxy are 18 - 20th magnitude. Another
unexpected bonus was the proliferation of gold and blue supergiant
stars across the entire galaxy, the gold stars particularly evident
on the lower left edge of the galaxy. Some very nice HII regions
appear on the upper left quadrant. One is a large ring shape
embedded within an association of many hot blue O/B stars.
There are some
additional objects in this field worth noting. Inside the galaxy
itself are four faint anonymous galaxies which of course are
far behind this Local Group denizen. The brightest and easiest
to see is an edge on on the lower left edge of the main glow,
just below a bright star. This is MAC0105+0204, and unknown class
17th magnitude probable spiral type. there is another, just to
the right of the core inside the bright glow, a 17th mag object
as well, MAC014+0207.
And of course
lets not forget the Asteroid 1998 FV67, a newly discovered member of
our solar system in 1998, which is currently at 19.3 magnitude.
It is the trail of colored dots on the lower right part of the
image. This is because it moved between color frames and you
can see the repeated sequence of RGBRGB as the object moved.
So the top is the start of the exposure, since it is the red