Deep Sky Object in Spring
Leo I (Galaxy in Leo)

Date & Time: Apr 9 2005, from 19:58 to 20:05 JST(+0900)
Composed 4 shots with 90 seconds exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Fujifilm FinePix S2 Pro
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

Leo I / Galaxy, type dE3
R.A.10h 08m 27.4s (2000.0)
Dec.+12° 18' 27" (2000.0)
Apparent Size11.0×8.0'
Radial VelocityN/A
Distance600 thousand light yrs.
Garoup of GalaxiesLocal Group of Galaxies
Other IDsUGC5470, MCG2-26-27,
DDO74, PGC29488
I'd like to introduce you a bit rare celestial object in Leo. This picture shows you a celestial field just north of alpha Leonis, Regulus. There is an extremely faint elongated galaxy Leo I (Leo-one) just 20 arc minutes north of Regulus. Though Leo I has a size of about 10 arc minutes, is very faint magnitude around 11. It's absolutely impossible to detect it with naked eyes in spite of using fairly large scopes. Please pay your attention around an intersection area of white lines. It's just the figure of the galaxy that the round and bright area.
Leo I is a member of the local group of galaxies includes our Galaxy and the Andromeda Galaxy and so on. The galaxy was discovered in 1950's in an astronomical photograph.


Leo II

Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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