Deep Sky Object in Summer
IC1276 (Globular Cluster in Serpens Cauda)


Date & Time: May 1 2023, from 25:38 to 26:07 JST(+0900)
Composed 15 shots with 2 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...ISO2500, White Balance...Daylight


IC1276 / Globular Cluster, type XII
R.A.18h 10m 44.2s (2000.0)
Dec.-07°12' 27" (2000.0)
Apparent Size8.0'
Real Size40 light yrs.
Magnitude10.3
Distance17,600 light yrs.
IC 1276 is a small and sparse globular cluster located in the almost central part of the constellation Serpens Cauda. To locate it, one can follow a path about 4 degrees northeast from the neighboring star νOph. The cluster has an apparent diameter of 8 arc minutes and a brightness of 10th magnitude, and is classified as Class XII, the sparsest concentration index of globular clusters. Its estimated distance is 17,600 light years.



IC1257
3rd Scenes: Deepsky in Autumn

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