Category: DSO

11/6/2015, from Sunnyvale CA Orion 11 inch Astrograph 1 min x 30 subs Darks 15, Flats and Dark-Flats 20 and 20. EOS XSi with IDAS LPS-P2 on CGEM

from Sunnyvale CA 2015/10/5~7 VC200L at 1800mmFl + EOS XSi ISO1600, 4.5 hour exposure at 3 min/sub

From left to right, the images of IC10 with 0.2m Cassegrain, 4m Ritchey Chretien, 8.2 m Aperture Scope. The Cassegrain captured 19~19.5 magnitude stars under the SQM 18.6 light pollution. —————————————— IC１０の続きです。 （１）０．２m口径、６時間露光で　どれくらい情報を集めてるかは興味があるところなので結果を、（２）４ｍ口径　RC、（３）８．２ｍ口径の望遠鏡による「IC10」と比べてみました。（３）実力が出てるかどうかはわかりません。　 星の等級は調べ直して図中に表示しました。光害地での露光であることを考えると、１９．０〜１９．５等級というのは驚異的なものでしょうね。 この比較を見るに、１５〜２５ｃｍのカセグレンというのはミラクル商品です。値段、光学性能、重さ、取り扱いの難易、についでバランス抜群ですね。

Shot from Sunnyvale California USA on 9/21~22/2015 Scope and Camera: Vixen VC200L 1800mm FL + EOS Rebel XSI IR- modified 5 hours 45 minutes cumulative exposure at ISO1600 and 3 min/sub, guided with 400mm scope with Meade DSI Pro II, stacked with DSS with 2X Drizzle, camera control and dithering with PHD2 and ImagePlus 5.75, processed with PS CS5, Noise Ninja, Starshrink ———————————————- IC10, in the constellation Cassiopeia, belongs to the Local Group Galaxies, comprising of Andromeda Galaxy M31, Triangulum Galaxy M33, our Milkyway Galaxy, Large Magellanic Cloud, Small Magellanic Cloud, etc.

Merging two shots, one taken on July 2010 ( ISO 3200 1.5 min x few subs) and another on August 2015 (ISO1600 3 min x 2 subs). A luminance image is created from both the 2010 and the 2015 images. The RGB image is generated out of the 2015 shots.

8/22/2015 from Sunnyvale CA VC200L 1800mmFL,EOS REBEL XSi ISO1600 3min x 17 subs

NGC 5846 ist eine elliptische Galaxie und liegt im Sternbild Jungfrau. Sie hat eine Winkelausdehnung von 4,1′ × 3,8′ und eine scheinbare Helligkeit von 10,1 mag. Die Galaxie wurde am 24. Februar 1786 von William Herschel entdeckt. 銀河列の一部　乙女の足元付近 NGC５８４６は楕円銀河、NGC５８５０は棒状銀河。 VC200L＋Reducer Light=３MinX２２枚、Dark,Flat,Dark-Flat　それぞれ１５〜２０枚くらい アダムーブロックの写真を以下に参照。 http://www.caelumobservatory.com/gallery/n5850.shtml

NGC 6384 barred spiral galaxy located about 60 million light-years away in the constellation Ophiuchus. SAB(r)bc, inclined by an angle of 47°, NGC 6384 is now classified as a transition object (T2), which is thought to be a LINER-type galaxy whose emission-line spectra is contaminated by H II regions in the nucleus.

NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in Vulpecula, near M27, the Dumbbell Nebula. The nebula NGC 6820 is also called Sharpless catalog Sh 2-86. Light 3MinX28Subs