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Sh 2 - 308 in Canis Major

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Wolf-Rayet Nebula Reiner Vogel 2012 Sh 2 - 308 in Canis Major 60x60, blue RGB Dean Salman OIII other name RA dec dia. ' F S B Sh 2-308 06 54 08.9 -23 56 31 35 3 3 2 Distance: 575 pc, Size: 5.9 pc, Source: 2003MNRAS.346.1143B This ring nebula surrounds the Wolf-Rayet star WR 6. Observing notes: 22" f/4.5 01/2011. Fantastic WR bubble, responds extremely well to OIII filter. Shell is most obvious as a crescent NW of o1 CMa, becoming fainter at NW. Brighter patch again at N to NE. At 80x under excellent conditions, the shell can be further followed from this N part down the E side back to o1 CMa, forming a closed bubble around EZ CMa. Only with 7mm exit pupil, the center appears filled and somewhat lighter than the outside of the bubble. This is not visible with 5.5mm exit pupil. Sirius 7h30m 7h00m 6h30m i Bochum 4 Murzim n3 n1 NGC 2 n2 p 15 17 -20°00' M 41 12 Canis Major x2 x1 o2 o1 29 Cr 121 t -25°00' NGC26 2354 27 Wezen w Markab s Adara Aludra Furud -30°00' 10 -22°00' 7h05m 7h00m 6h55m 6h50m 6h45m Canis Major -23°00' o2 -24°00' o1 Cr 121 -25°00' NGC 2359 in Canis Major 60x60, red narrowband, Dean Salman other name RA dec dia. ' F S B Sh 2-298 NGC2359 = Thor's Helmet 07 18 38.0 -13 11 55 22 3 3 3 Distance: 5000 pc, Size: 32.0 pc, Source: 2001AJ....121.2664C Nicknamed Thor's Helmet, this nebula (also called NGC 2359) is a wind blown bubble ionized by the Wolf-Rayet star WR 7 (HD 56925). Observing notes: 22" f/4.5 Responds extremely well to OIII filter. Very structured and bright WR nebula with shell, E bar and extensions toward NW and SW -05°00' 8h00m 7h30m 7h00m M 50 a -10°00' NGC 2353 q 5 NGC 2374 9 NGC 2423 m 4 NGCM 47 2478 11 2 10 M 46 -15°00' NGC 2360 Muliphen Sirius Bochum 4 i 6 n3 p -20°00' 15 17 7h25m 7h20m 7h15m 7h10m NGC 2396 -12°00' Haffner 8 7h30m -13°00' Haffner 6 NGC 2374 -14°00' Basel 11A -15°00' G2.4+1.4 (WR 102) bubble in Sagittarius 30x30 blue other RA Dek comments 17 45 47.56 -26 10 26.9 Observing notes: M24 18h30m 18h00m M 23 17h30m Tr 33 NGC 6595 -20°00' 16 21 15 m x 58 14 NGC 6568 NGC 6469 M 21 M 20 NGC 6546 11 4 Cr 367 51 7 44 9 o NGCM 6530 8 q M 28 NGC 6544 -25°00' l 30'x30' NGC 6355 36 3 NGC 6520 43 5° Cr 347 g1 45 d NGC 6451 g2 -30°00' M 18 NGC 6425 M 6 NGC 6416 Tr 28 NGC 6383 M 69 17h00m 17h55m 17h50m 17h45m 17h40m 17h35m Ter 5 Terzan 11 -25°00' -26°00' Pal 6 30'x30' -27°00' 3 Sh 2 - 80 in Sagitta 60x60, red POSS blue POSS red composite other name RA dec dia. ' F S B Sh 2-080 M1-67, WR shell 19 11 28.5 +16 51 57 2 3 2 3 Distance: 6400 pc, Size: 3.7 pc Source: 2000A&A...360..227N This is a ring nebula surrounding the Wolf Rayet star WR 124, also known as Merrill's star. Observing notes: 22" f/4.5 08/2008: unsuccessful 06/2010: suspected as a faint glow around WR star with H beta filter 10/2010: at 350x and with H beta filter, a diffuse glow was observed around the WR star. 08/2012: under excellent conditions, at 200 and 350x visible without filter as a very faint shell, small contrast gain with H beta filter. 18h30m 2 12 113 1 112 1 110 +20°00' 5 Cr 399 9 4 z d 111 Sham b Sagitta e +15°00' Deneb El Okab Deneb El Okab 10 11 28 p c 31 w2 w1 18 Tarazed o +10°00' 19h30m 19h00m Pal 10 +18°00' PK 50+ 5.1 PK 51+ 3.1 +17°00' PK 50+ 3.1 +16°00' PK 49+ 2.1 19h20m 19h15m 19h10m 19h05m WR 128 in Sagitta 30x30 blue Ha/OIII/mix other RA Dek comments 19 48 32.20 +18 12 03.7 Observing notes: During two observing sessions with my 22" f/4.5 Dob and the 13mm Nagler with OIII filter, a segment in the NE part of the shell was suspected as an extremely faint filament. This corresponds to the brightest part of the shell in the OIII image by Gruendl. +25°00' Stock 1 Vulpecula 16 24 8 25 a 13 22 17 14 NGC 6823 2 NGC 6830 M 27 12 1 1 +20°00' 5 h Cr 399 9 4 g z M 71 d Harvard 20 30'x30' a 13 b 15 11 Sagitta 10 e 5° +15°00' r 28 31 p c w2 w1 f 20h30m 20h00m 19h30m +20°00' g z +19°00' M 71 M 71 9 d Harvard 20 +18°00' a 30'x30' b +17°00' Sagitta 11 10 20h00m 19h55m 19h50m 19h45m 19h40m WR134 shell in Cygnus other RA Dek comments WR134 shell 20 09 36 + 36 14 00 Wolf-Rayet shell Observing notes: The shell is roughly half ways between the Tulip Nebula, Sharpless 101, and the Crescent Nebula, NGC 6888. With my 22" Dob, the WR shell is not or only hardly visible without filter and reacts extremely well to the OIII filter. With filter it appears as a crescent of roughly 15', opened towards east. Its appearance and brightness is similar to that of another WR shell Sharpless 308 in Canis Major, which is, however, considerably larger. This shell is not difficult at all and is also faintly visible with my 8" Dob and OIII filter from my suburban backyard. Äquat. Koord. Apparent 2008-09-11 13h00m32s (CEST) Mag:9.6 Ges.feld:+20°00'00s Q +40°00' J M 29 O +35°00' NGC 6871 Biur 2 K H F +30°00' I 21h00m 20h30m 20h00m 19h30m +38°00'Äquat. Koord. Apparent 2008-09-11 13h01m02s (CEST) Mag:12.0 Ges.feld:+05°00'00s IC 4996 B145 +37°00' +36°00' NGC 6883 NGC 6871 Biur 2 +35°00' 20h20m 20h15m 20h10m 20h05m 20h00m NGC 6888 in Cygnus 60x60, blue POSS blue POSS red RGB Dean Salman other name RA dec dia. ' F S B Sh 2-105 NGC<6888 = Crescent Nebula 20 12 02.4 +38 20 59 18 2 3 3 Distance: 1200 pc, Size: 6.3 pc, Source: 1982ApJS...49..183B NGC 6888, the Crescent nebula, is a ring nebula surrounding the Wolf Rayet star WR 136. Observing notes: 22" f/4.5 best response to OIII, but also visible w/o filter. Spectacular WR shell with internal filaments. 08/2012: central bar extends over central star. two patches in SW part, several knots along NW rim. Shell is closed, there is an extrusion on NW side towards star. Deneb +45°00' d 57 x NGC 7000 IC 5070 56 Cygnus 14 n +40°00' Sadr 19 40 22 34 15 11 36 25 l 29 28 4 42 +35°00' 27 47 h 35 8 Gienah Cygni 17 c 49 NGC 6992 39 21h00m 20h30m 20h00m 19h30m +40°00' PK 75+ 4.1 vdB 130 +39°00' Berk 86 M 29 PK 76+ 1.1 Basel 6 NGC 6888 +38°00' 34 B145 IC 4996 NGC 6881 +37°00' 25 36 28 29 20h25m 20h20m 20h15m 20h10m 20h05m 20h00m E patch, faint Sh 2 - 157 edge diffuse in Cep/Cas Sh2-157a main filament diffuse W filament, very faint both images are fan shaped cluster rotated, north to the right narrowband Dean Salman other name RA dec dia. ' F S B Sh 2-157 23 16 03.2 +60 02 44 90 3 3 3 Distance: 2500 pc, Size: 65.5 pc, Source: 1982ApJS...49..183B This is a ring nebula around WR 157, in the Basel 3 (Markarian 50) cluster that is in turn part of Cas OB2. Observing14" f/5 notes: 08/2005: A very long and relatively bright filament oriented NS is easily visible that responds extremely well to OIII filtering. S157a (bright knot in northern central part) best with H beta 22" f/4.5 11/2011: Main filament N/S oriented is most distinct. Faint patch E of it. Another shorter and weaker filament W of main filament. S part diffuse, consisting of two patches of which the E patch contains 157a. +65°00' 1h00m i 26 Alkurhah 10 k 18 30 20 25 19 12 9 6 4 +60°00' l Caph 2 1 z 14 t d r e 22h00m +55°00' s 0h30m 0h00m 23h30m 23h00m 22h30m b +62°00' M 52 +61°00' NGC 7635 NGC 7510 King 19 Mrk 50 +60°00' 1 2 +59°00' 23h30m 23h15m 23h00m WR 93 and Sh 2 - 11 in Scorpius 60x60, red POSS blue other name RA dec dia. ' F S B Sh 2-011 N6357: 17 26 30.6 -34 12 20 90 3 3 3 Distance: 1740 pc, Size: 45.6 pc, Source: 1982ApJS...49..183B This is the star formation region W22, also called the War and Peace Nebula or NGC 6357. Contains the star cluster Pismis 24 which includes a multiple O4 and O4-5 star system.
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  • February 14, 2015 7:00Pm at the Herrett Center for Arts & Science Colleagues, College of Southern Idaho

    February 14, 2015 7:00Pm at the Herrett Center for Arts & Science Colleagues, College of Southern Idaho

    Snake River Skies The Newsletter of the Magic Valley Astronomical Society www.mvastro.org Membership Meeting President’s Message Saturday, February 14, 2015 7:00pm at the Herrett Center for Arts & Science Colleagues, College of Southern Idaho. Public Star Party Follows at the It’s that time of year when obstacles appear in the sky. In particular, this year is Centennial Obs. loaded with fog. It got in the way of letting us see the dance of the Jovian moons late last month, and it’s hindered our views of other unique shows. Still, members Club Officers reported finding enough of a clear sky to let us see Comet Lovejoy, and some great photos by members are popping up on the Facebook page. Robert Mayer, President This month, however, is a great opportunity to see the benefit of something [email protected] getting in the way. Our own Chris Anderson of the Herrett Center has been using 208-312-1203 the Centennial Observatory’s scope to do work on occultation’s, particularly with asteroids. This month’s MVAS meeting on Feb. 14th will give him the stage to Terry Wofford, Vice President show us just how this all works. [email protected] The following weekend may also be the time the weather allows us to resume 208-308-1821 MVAS-only star parties. Feb. 21 is a great window for a possible star party; we’ll announce the location if the weather permits. However, if we don’t get that Gary Leavitt, Secretary window, we’ll fall back on what has become a MVAS tradition: Planetarium night [email protected] at the Herrett Center.