Deep Sky Object in Spring
Abell 1775 (Galaxy Cluster in Bootes)



Date & Time: May 3 2024, from 22:36 to 23:31 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight



Abell 1775 / Galaxy Cluster, type 2 4 I
R.A.13h 41m 54.0s (2000.0)
Dec.+26°21' 00" (2000.0)
Apparent Size33.6'
# of Galaxies92
Red Shift0.0705
Magnitude15.7
Distance950 million light yrs.
Galactic superclusterBootes Supercluster
Abell 1775 is the galaxy cluster lying near the boundary between Bootes and Coma Berenices, about 10.6 degrees northwest of Arcturus. Positioned about 950 million light-years away, it contains over 90 member galaxies within an area spanning just over 30 arc minutes. By clicking the button in the upper right corner of the page, you can switch between an image with the stars in the Milky Way Galaxy removed and the original image.
This galaxy cluster is relatively larger one within the "Bootes super galaxy cluster". In the central region of Abell 1775, two bright galaxies can be seen nestled together. The galaxy on the left is PGC48495, while the one on the right is PGC48481, both shining with a brightness ranging from magnitude 15 to 16.




Coma Cluster

Abell 1795


Copyright(c) 2023 by Naoyuki Kurita, All rights reserved.
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