Deep Sky Object in Autumn
NGC457 (Open Cluster in Cassiopeia)

Click on image to enlarge

Date & Time: Oct 21 2023, from 23:17 to 23:59 JST(+0900)
Composed 8 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


NGC457 / Open Cluster, type II 3 r
R.A.01h 19m 6.0s (2000.0)
Dec.+58° 20' 00" (2000.0)
Apparent Size13.0'
Real Size30 light yrs.
# of Stars80
Magnitude6.4
Distance7920 light yrs.
Other IDsCr 12, Mel 7
NGC457 is a open cluster about four degrees SE of γ Cassiopeiae. It has a size of about 13 arc minutes, and seems to be a dimmed nebula surrounding a star with fifth magnitude, phi Cas, by using of binoculars.
Although this cluster isn't so popular, it's worthy of note that the cluster looks like a human with arms extended when this picture being upside down. I strongly recommend you to see the cluster with telescopes once, you'll be impressed with its unique shape.



NGC225
Around NGC663 & M103

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