From yann.pothier at tiscali.fr Tue Nov 6 02:22:23 2007 From: yann.pothier at tiscali.fr (Yann POTHIER) Date: Tue, 06 Nov 2007 08:22:23 +0100 Subject: (IAAC) NGC 6907 / NGC 6908 - Newtonian 17.5" (445mm) F/4.5 Message-ID: Observer: Yann POTHIER (France) Your skill: advanced (many years) Object: NGC 6907 + NGC 6908 Category: galaxy SBBs/SBS4 + ? Constellation: CAP Object data 6907 : Vmag=11.3, Bmag=11.9, 5.4'x4.0', PA46?, z=0.010614, vr=3182km/s Object data 6908 : Vmag=14.6, Bmag=15.5, 0.3'x0.1', PA68?, z=?, vr=?km/s RA/DE: 20h25m06.6s, -24?48'35" + 20h25m08.7s, -24?48'02" (2000.0) Date and UT of observation: 11 august 2007, 22h40 UT Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36) Site classification: rural, alt.1650m (5500ft) Limiting magnitude (visual in UMi): 6.31 (30% of the time) Transparency (1 to 5 - best to worst): 1 Seeing (1 to 5 - best to worst): 2 Height above horizon: 21? Moon up (phase?): no Instrument: Coulter 445mm/17.5" F/4.5 Magnification: 80-426x Filters used: - Description: at 271x, 6907 is a medium sized galaxy, moderately bright, seen at 80x on the verge between direct vision and averted vision; oval, about 1.4'x1.1' ENE-WSW, with very diffused edges and a brighter central area; an obvious central bar E-W is seen from which a NE spiral arm leaves, seen 75% of the observing time with averted vision, curving about 1.2' clockwise and containing a brighter zone [6908] from NE to N (PA60 to 90?) well detached from main body; at the opposite of the bar, a SW spiral arm is seen less than 5% of the observing time with averted vision at 271x, about 0.8' in length, much more in contact with the main body of the galaxy; a mag.11 star is 2.6' to the E.. -- Carpe noctem, Yann. Yann Pothier 11 impasse Canart, 75012 PARIS, FRANCE yann.pothier at fnac.net http://www.astrosurf.com/cielextreme From yann.pothier at tiscali.fr Thu Nov 8 02:33:45 2007 From: yann.pothier at tiscali.fr (Yann POTHIER) Date: Thu, 08 Nov 2007 08:33:45 +0100 Subject: (IAAC) Simeis 57 - Newtonian 17.5" (445mm) F/4.5 Message-ID: Observer: Yann POTHIER (France) Your skill: advanced (many years) Object: Simeis 57 (DWB11, DWB118, DWB119) Category: diffuse nebula, HII region Constellation: CYG Object data: 23.3'x22.0' RA/DE: 20h16m09.7s, +43?41'09" (2000.0) Date and UT of observation: 12 august 2007, 00h50 UT Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36) Site classification: rural, alt.1650m (5500ft) Limiting magnitude (visual in UMi): 6.31 (30% of the time) Transparency (1 to 5 - best to worst): 1 Seeing (1 to 5 - best to worst): 2 Height above horizon: 65? Moon up (phase?): no Instrument: Coulter 445mm/17.5" F/4.5 Magnification: 80-125x Filters used: UHC, Hbeta Description: at 80 & 125x, with UHC & Hbeta filters, large nebula, extremely faint, seen between 10 & 25% of the observing time according to the part concerned; irregular shape and ill-defined edges, homogeneous (no inner details observed) and difficult to see; UHC gives a slight contrast gain, OIII gives none and Hbeta gives a good contrast boost ! (emissive type for sure) Its global shape is that of a distorted greek lambda letter of about 20'x10' elongated N-S. The best seen part (DWB119) is centered on 20h16m28s et +43?47'14", just to the S of a mag.9 star. It is seen 25% of the observing time like a nebulous curved wisp of 9.3' elongated N-S (width= 1.7') with concavity facing W. Its S end (to the S of two faint stars of mag.12-13) is much fainter, seen about 1% of the observing time at 80x with Hbeta filter. Another part (ranked second in ease of detection order) called DWB111 extends on the SSE side of a double star (9+9th mag.), centered on 20h15m46s et +43?35'36". It is seen 10% of the observing time at 80x + Hbeta filter with a still fainter NE extension detected about 1% of the observing time. This wisp is about 9.5' long (width= 1.7') with concavity facing E and its shape and stellar surrounding reminds me of NGC 6960 (Veil Nebula around 52 CYG). A last part (ranked third in detection order) is the faintest (DWB118) seen 5% of the observing time, to the SW of a mag.8 star, centered on 20h16m19s et +43?33'59". It is an elongated patch of about 4.8'x1.7' NW-SE. -- Carpe noctem, Yann. Yann Pothier 11 impasse Canart, 75012 PARIS, FRANCE yann.pothier at fnac.net http://www.astrosurf.com/cielextreme From yann.pothier at tiscali.fr Thu Nov 8 03:34:45 2007 From: yann.pothier at tiscali.fr (Yann POTHIER) Date: Thu, 08 Nov 2007 09:34:45 +0100 Subject: (IAAC) NGC 7463, NGC 7464, NGC 7465 - Newtonian 17.5" (445mm) F/4.5 Message-ID: Observer: Yann POTHIER (France) Your skill: advanced (many years) Object: NGC 7463, NGC 7464, NGC 7465 Category: galaxy SABb/P + E1p + SB0 Constellation: PEG Object data: Bmag=13.8+14.5+13.3, 3.2'x0.6' + 0.8'x0.8' + 1.2'x0.8', PA90+ +165?, z= 0.007809+0.006254+0.006565, VR= 2341+1875+1968 km/s RA/DE: 23h01m51.8s, +15?58'53", 23h01m53.8s, +15?58'26", 23h02m00.9s, +15?57'53" (2000.0) Date and UT of observation: 12 august 2007, 01h35 UT Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36) Site classification: rural, alt.1650m (5500ft) Limiting magnitude (visual in UMi): 6.31 (30% of the time) Transparency (1 to 5 - best to worst): 1 Seeing (1 to 5 - best to worst): 2 Height above horizon: 61? Moon up (phase?): no Instrument: Coulter 445mm/17.5" F/4.5 Magnification: 80-426x Filters used: - Description: at 271x, group composed of 3 galaxies to the ENE of HD142100 of V=8.24 (estimated of 9th mag.); from the star, 7463 is 2.5'NE, then 7464 is 0.7'SE and 7465 is 1.8'E (and a little S). 7463 is very small, very faint, seen 75% of the observing time with averted vision, observed from 80 to 426x; elongated 53"x19" about E-O, homogeneous with diffuse edges. Its extensions are rapidly thinner. 7464 is very small, very very faint, seen 50% of the observing time with averted vision, observed from 80 to 426x; round, ? about 20", homogeneous with diffuse edges. 7465 is very small, faint, seen continuously with averted vision, observed from 80 to 426x; ovale, 30"x20" NW-SE, brighter center with stellar nucleus, diffuse edges. -- Carpe noctem, Yann. Yann Pothier 11 impasse Canart, 75012 PARIS, FRANCE yann.pothier at fnac.net http://www.astrosurf.com/cielextreme From yann.pothier at tiscali.fr Thu Nov 8 15:51:22 2007 From: yann.pothier at tiscali.fr (Yann POTHIER) Date: Thu, 08 Nov 2007 21:51:22 +0100 Subject: (IAAC) NGC 7578 / HCG 94 - Newtonian 17.5" (445mm) F/4.5 Message-ID: Observer: Yann POTHIER (France) Your skill: advanced (many years) Object: NGC 7578, HCG 94, Arp 170, VV 181 Category: cluster of galaxies Constellation: CAP Object data : composed of PGC 70933 (HCG94B, UGC 12477), PGC 70934 (HCG94A, UGC 12478), PGC 70936 (HCG94D) & PGC 70943 (HCG94C), Bmags= 14.95+14.70+16.33+16.19, dimensions= 1.4'+1.0'+0.3'x0.2'+0.7'x0.3'; RA/DE: 23h17m12.0s, +18?42'04"; 23h17m13.5s, +18?42'27"; 23h17m15.2s, +18?42'42"; 23h17m20.2s, +18?44'05" (2000.0) Date and UT of observation: 12 august 2007, 02h30 UT Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36) Site classification: rural, alt.1650m (5500ft) Limiting magnitude (visual in UMi): 6.31 (30% of the time) Transparency (1 to 5 - best to worst): 1 Seeing (1 to 5 - best to worst): 2 Height above horizon: 61? Moon up (phase?): no Instrument: Coulter 445mm (17.5"), F/4.5 Magnification: 80-426x Filters used: - Description: at 271 and 426x, nice group of 4 galaxies in line on a 3' segment NE-SW, seen together 50% of the observing time at 80x like a faint unresolved open cluster; from SW to NE are to be found : PGC 70933 (HCG94B), very small, extremely faint, seen about 5% of the observing time at 271x, round, about 15" in ? (0.25'), homogeneous with diffuse edges; mag.14 star is at 0.8'ESE. PGC 70934 (HCG94A), 35" to the NE, very small, very very faint, seen about 25% of the observing time at 271x, round, about 34" in ? (0.56'), with a brighter center. PGC 70936 (HCG94D), 24" to the NE, extremely small, extremely faint, seen about 1% of the observing time at 271x (a few glimpses), observed from 271 to 426x; round, about 8" de ? (0.13'), homogeneous with diffuse edges; mag.16 star just against the border, less than 5"SSW distant (between this galaxy and the preceding). PGC 70943 (HCG94C), 1.8' to the NE, very small, extremely faint, seen a few % of the observing time at 271x, observed from 271 to 426x; oval, 15"x10" (0.24'x0.16') NNW-SSE, homogeneous with diffuse edges. -- Carpe noctem, Yann. Yann Pothier 11 impasse Canart, 75012 PARIS, FRANCE yann.pothier at fnac.net http://www.astrosurf.com/cielextreme