M81 (NGC3031) おおぐま座の系外星雲
RA, Dec: 9h 55m 33.5s , +69d 3m 59s (E2000)
Magnitude: 7.91 Size (mins) 26.7 x 14.2 Source Catalog PGC
DATE 1998/1/25 Time 23h54m(JST) Exp 360sec(120s*3)
Vixen GP-D+Takahasi MT-130(D:130mm F6.1)+ST-7(2x2binning temp-15℃)
撮影地 埼玉県深谷市