MAP of Abell Galaxy Cluster South 805
PIX INSIGHT -
Plate Solver
Script Version 1.6
COURTESY OF ENZO DE BERNARDINI
JULY
2012, Archicampo, Doyle Provincia de Buenos Aires,
Argentina
Image Plate Solver script
version 1.6
===============================================================================
Referentiation Matrix (Gnomonic
projection = Matrix * Coords[x,y]):
+0.000358546211
+0.000015204058 -0.295789287240
+0.000015271905
-0.000358496798 +0.198764269036
+0.000000000000
+0.000000000000 +1.000000000000
Resolution ........ 1.292
arcsec/pix
Rotation .......... -177.562
deg (flipped)
Focal ............. 862.20 mm
Pixel size ........ 5.40 um
Field of view ..... 34' 26.9" x
25' 20.5"
Image center ...... RA: 18 47
08.102 Dec: -63 20 23.74
Image bounds:
top-left ....... RA: 18 44
30.984 Dec: -63 08 22.79
top-right ...... RA: 18 49
35.590 Dec: -63 06 55.47
bottom-left .... RA: 18 44
38.307 Dec: -63 33 42.35
bottom-right ... RA: 18 49
47.406 Dec: -63 32 13.75
===============================================================================
DATA
TYPE: Galaxy Cluster
APPARENT MAGNITUDE: IC 4765 11.03 and
fainter
IMAGE FOV: 32 x 25 arc minutes
SIZE: IC 4765 3 x 2 arc
minutes
DISTANCE: 220 millions light years
OBJECT DESCRIPTION AND IMAGE SESSION
AGCS 805 stands for Abell Galaxy Cluster
South 805. The cluster includes at least
eight major galaxies and probably
several dozen dwarf galaxies. In this
image, all the galaxies seem to be
equally distant from us. Most here are
true members of AGCS 805 about 220
million light-years away. The brightest
galaxy in the centre of the image is IC
4765 — a 12th magnitude super giant
elliptical galaxy that gravitationally
dominates the lesser cluster members.
Adding an extra dimension to this big
picture, because AGCS 805 is about 220
million light-years distant, we cannot
see these galaxies in “real time”. We
can only see them as they were 220
million years ago because it takes that
long for their light to reach our
telescopes. The light from these
galaxies we see now left them about the
same time the first true dinosaurs
roamed the Earth in the mid-Triassic
period.
AGCS 805 is a massive cluster of dozens
of galaxies containing trillions of
stars (so vast and remote as to be
beyond meaningful human comprehension).
However, it is just one component of a
vastly bigger Pavo-Indus super-cluster
of galaxies including more than a dozen
other similar galaxy clusters: a cluster
of galaxy clusters. (*)
(*)
Sydney Observatory Essay on AGCS 805
IMAGE INFORMATION
SCOPE: Celestron SCT 8" Starizona
Corrector @ f8 (1600 mm FL)
MOUNT: Sky Watcher NEQ6
SKY CONDITIONS:
Rural Skies - seeing good - transparency good
CAMERAS: QSI 583 WS -10Cº
FILTERS: Baader 31 mm LRGB,
EXPOSURES:
LRGB (60,30,30,30) L bin 1x1, RGB bin 2x2
GUIDING: William Optics ZenithStar 66 f6.
Starlight Xpress Lodestar Camera. PHD Guiding
PROCESSING:
Images Plus,
NASA Photoshop Fits Liberator, Photoshop CS