Wolf-Rayet Nebula

Wolf-Rayet Nebula
Reiner Vogel
2012
Sh 2 - 308
in Canis Major
60x60, blue
RGB Dean Salman
OIII
other name
Sh 2-308
RA
06 54 08.9
dec
-23 56 31
dia. '
35
F
3
S
3
B
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.
7h30m
Sirius
7h00m
6h30m
i
Bochum 4
Murzim
n3
n1
NGC 2
n2
p
17
15
-20°00'
12
M 41
Canis Major
x2
x1
o2
o1
29
Cr 121
t
-25°00'
NGC
262354
27
Wezen
w
Markab
s
Adara
Aludra
Furud
-30°00'
10
-22°00'
7h05m
7h00m
6h55m
6h50m
Canis Major
-23°00'
o2
-24°00'
o1
Cr 121
-25°00'
6h45m
NGC 2359
in Canis Major
60x60, red
narrowband, Dean Salman
other name
Sh 2-298
NGC2359 = Thor's Helmet
RA
07 18 38.0
dec
-13 11 55
dia. '
22
F
3
S
3
B
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
4
11
M 47 2478
NGC
2
10
m
M 46
-15°00'
Muliphen
NGC 2360
Sirius
Bochum 4
i
6
n3
p
-20°00'
17
7h25m
7h20m
7h15m
NGC 2396
-12°00'
7h30m
Haffner 8
-13°00'
Haffner 6
NGC 2374
-14°00'
-15°00'
Basel 11A
15
7h10m
G2.4+1.4 (WR 102) bubble in Sagittarius
30x30 blue
other
Observing notes:
RA
Dek
17 45 47.56
-26 10 26.9
comments
M 24
18h30m
Tr 33
18h00m
17h30m
M 23
NGC 6595
16
-20°00'
21
15
m
14
x
58
NGC 6568
NGC 6469
M 21
M 20
NGC 6546
11
4
51
Cr 367
44
9 7
NGCM6530
8
o
q
NGC 6544
M 28
-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
M6
NGC 6416
Tr 28
NGC 6383
M 69
17h00m
17h55m
17h50m
Terzan 11
17h45m
Ter 5
-25°00'
-26°00'
Pal 6
30'x30'
-27°00'
3
17h40m
17h35m
Sh 2 - 80
in Sagitta
60x60, red
POSS blue
POSS red
other name
Sh 2-080
M1-67, WR shell
RA
19 11 28.5
composite
dec
+16 51 57
dia. '
2
F
3
S
2
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.
B
3
18h30m
2
12
113
1
112
1
110
+20°00'
5
9
Cr 399
4
z
d
111
Sham
b
Sagitta
e
+15°00'
Deneb El Okab
Deneb El Okab 10
11
28
p
31
c
w2
w1
18
o
Tarazed
+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
19 48 32.20
+18 12 03.7
comments
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'
Vulpecula
Stock 1
16
24
25
8a
13
17
22
2
NGC 6823
14
NGC 6830
12
M 27
1
1
+20°00'
5
h
4
9
Cr 399
g
z
M 71
d
Harvard 20
30'x30'
a
13
b
15
11
Sagitta
10
e
5°
+15°00'
r
28
31
c
p
w2
w1
f
20h30m
20h00m
19h30m
+20°00'
g
z
+19°00'
M 71
M 71
9
d
Harvard 20
a
+18°00'
30'x30'
b
+17°00'
Sagitta
11
10
20h00m
19h55m
19h50m
19h45m
19h40m
WR134 shell in Cygnus
other
WR134 shell
RA
Dek
comments
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
B145
IC 4996
+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
other name
Sh 2-105
NGC<6888 = Crescent Nebula
RA
20 12 02.4
RGB Dean Salman
dec
+38 20 59
dia. '
18
F
2
S
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.
B
3
Deneb
+45°00'
57
NGC 7000
x
56
d
IC 5070
Cygnus
14
n
+40°00'
Sadr
19
22
40
34
15
11
25
36
l
29
4
28
42
27
+35°00'
47
h
35
8
Gienah Cygni
17
c
49
39
NGC 6992
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
25
+37°00'
36
28
29
20h25m
20h20m
20h15m
20h10m
20h05m
20h00m
Sh 2 - 157
E patch, faint
edge
in
Cep/Cas
diffuse
Sh2-157a
main filament
diffuse
W filament,
very faint
fan shaped cluster
both images are
rotated, north to
the right
narrowband
Dean Salman
other name
Sh 2-157
RA
23 16 03.2
dec
+60 02 44
dia. ' F S B
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.
14" f/5
Observing
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
Alkurhah
26
10
k
18
30
20
25
12
19
9
6
4
+60°00'
l
Caph
2
1
z
e
r
+55°00'
s
0h30m
0h00m
23h30m
23h00m
22h30m
b
+62°00'
M 52
NGC 7635
+61°00'
NGC 7510
King 19
Mrk 50
+60°00'
1
2
+59°00'
23h30m
14
d
t
23h15m
23h00m
22h00m
WR 93 and Sh 2 - 11
in Scorpius
60x60, red
POSS blue
other name
Sh 2-011
N6357:
RA
17 26 30.6
dec
-34 12 20
dia. '
90
F
3
S
3
B
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. Near by is the Wolf-Rayet star WR 93, which
is also a multiple star system with a class O7-9 companion. At the same distance as the Cat's Paw nebula NGC
6334 and separated from it by a dark cloud.
Observing notes:
16" f/4.5
07/09: Only the central part of this large HII region could be observed. With OIII, this part is relatively bright and
appears not homogeneous, but distinctly mottled
18h00m
17h30m
17h00m
3
43
45
g1
-30°00'
g2
27
e
M7
Scorpius
-35°00'
l
u
NGC 6281
m2
m1
k
i2
i1
Tr 24
-40°00'
Cr 316
17h35m
17h30m
17h25m
17h20m
NGC 6383
6374
-33°00'
Tr 27
-34°00'
Cr 333
Pismis 24
-35°00'
B257
-36°00'
17h15m
WR127 and
Sh 2 - 92
in Cygnus
60x60, red
Dean Salman H alpha
other name
Sh 2-092
RA
dec
19 46 38.7
+28 14
44
dia. F S B
'
50 1
1
1
Distance: 4400 pc, Size: 64.0 pc Source: 1982ApJS...49..183B
Sh 2-92 is ionised by the Wolf-Rayet star WR 127, a binary star with an O9V companion, at a distance of 3700 parsecs
according to one source. Avedisova adds a second ionising star, the O7 Ib supergiant HD 332755 and gives a larger distance
estimate of 4740 +/- 100 parsecs.
Observing notes:
22" f/4.5
08/2012: Observed with 32mm, UHC better than H beta. Extremely faint glow, dark side towards SW. Difficult to
distinguish from the star field with filter.
+35°00'
35
SH2-101
19h00m
h
8
17
c
17
19
SH2-94
SH2-98
+30°00'
l
SH2-96
39
41
f
SH2-97
2
SH2-91
9
Roslund 4
21
SH2-92
23
15
b2
b1
60'x60'
19 18
20NGC 6882
NGC 6885
SH2-90
3
SH2-85
5°
+25°00'
Vulpecula
10
SH2-88
Stock 1
16
24
25
8a
SH2-87
13
22
17
SH2-86
NGC 6830
14
M 27
2
NGC 6823
12
1
20h30m
20h00m
19h30m
+30°00'
SH2-91
NGC 6834
SH2-95
NGC
6842
NGC 6842
+29°00'
SH2-92
+28°00'
60'x60'
NGC 6813
SH2-93
+27°00'
SH2-90
19h55m
SH2-89
19h50m
Sh2- 90
NGC 6815
19h45m
19h40m
1
WR 153/152 and
Sh 2 - 132
in Cepheus
60x60, red
narrowband Dean Salman
other name
Sh 2-132
RA
22 18 47.0
dec
+56 08 05
dia. '
90
F
3
S
3
B
2
Distance: 3180 pc, Size: 83.3 pc, Source: 1978A&A....70..205H
This giant HII region in the Cepheus OB1 association is ionised by two WR stars and several OB stars. HD 211853
(WR 153) and an O 8.5 star lie near the middle of the radio shell associated with this nebula.
Observing notes:
14" f/5
Observed several times with OIII filter, very large faint nebula, round dark structure to the E. There is a very
large extension to the SW well beyond the DSS frame with distinct OIII emission which increases the size of the
nebula to around 1.5°.
4
Alderamin
18
21h00m
20
25
9
19
+60°00'
n
12
2
1
l
Garnet Star
d
z
14
Tr 37
IC 1396
e
13
+55°00'
b
9
Azelfafage
+50°00'
23h30m
3
a
7
8
5
11
p2
4
23h00m
22h30m
M 39
21h30m
22h00m
+58°00'
22h00m
PK 103+ 0.2
NGC 7235
+57°00'
e
PK 104- 1.1
+56°00'
Berk 94
NGC 7226
+55°00'
PK 102- 2.1
22h35m
22h30m
22h25m
22h20m
22h15m
NGC 7245
22h10m
22h05m
Sh 2 - 162
in Cassiopeia
60x60, blue
POSS blue
POSS red
other name
Sh 2-162
NGC7635 = Bubble Nebula
RA
23 20 41.5
composite
dec
+61 11 52
dia. '
40
F
3
S
3
B
3
Distance: 3813 pc, Size: 5.8 pc, Source: 2003A&A...397..213P
This is the Bubble nebula, NGC 7635, a circular shell around the O6.5 IIIf star BD +60°2522.
A recent study finds the distance to Sh 2-162 to be 2500 parsecs, more in line with its assumed position in the Cas
OB2 association.
Observing notes:
22" f/4.5
10/2007: With OIII filter, the central part of the EN around the star is relatively easy. A fainter, diffuse halo
extends to the N. The bubble itself could be traced at least for a 90° arc E of the star.
1h00m
22h00m
o
+65°00'
i
Alkurhah
26
10
18
k
20
30
25
12
19
9
6
+60°00'
4
l
Caph
2
1
z
d
t
e
r
+55°00'
s
0h30m
0h00m
23h30m
23h00m
22h30m
+63°00'
23h45m
23h00m
4
+62°00'
M 52
NGC 7635
+61°00'
NGC 7510
King 19
Mrk 50
+60°00'
1
23h30m
23h15m