2010A&A...517A..56F

Query : 2010A&A...517A..56F

2010A&A...517A..56F - Astronomy and Astrophysics, volume 517A56-56 (2010/7-1)

Class I and class II methanol masers in high-mass star-forming regions.

FONTANI F., CESARONI R. and FURUYA R.S.

Abstract (from CDS):

Among the tracers of the earliest phases in the massive star formation process, methanol masers have gained increasing importance. The phenomenological distinction between Class I and II methanol masers is based on their spatial association with objects such as jets, cores, and ultracompact HII regions, but is also believed to correspond to different pumping mechanisms: radiation for Class II masers, collisions for Class I masers. We surveyed a large sample of massive star-forming regions in Class I and II methanol masers. The sample consists of 296 sources, divided into two groups named high and low according to their [25-12] and [60-12] IRAS colours. Previous studies indicate that the two groups may contain similar sources in different evolutionary stages, with the high sources representing the more evolved stages. Therefore, the sample can be used to assess a sequence for the occurrence of Class I and II methanol masers during the evolution of a massive star-forming region. We observed the 6GHz (Class II) CH3OH maser with the Effelsberg 100-m telescope, and the 44GHz and 95GHz (Class I) CH3OH masers with the Nobeyama 45-m telescope. We detected 55 sources in the Class II line (39 high and 16 low, 12 new detections); 27 sources in the 44GHz Class I line (19 high and 8 low, 17 new detections); 11 sources in the 95GHz Class I line (eight high and three low, all except one are new detections). The detection rate of Class II masers decreases with the distance of the source (as expected), whereas that of Class I masers peaks at ∼5kpc. This could be due to the Class I maser spots being spread over a region ≲1pc, comparable to the telescope beam diameter at a distance of ∼5kpc. We also find that the two Class I lines have similar spectral shapes at 44GHz and 95GHz, which confirms that they have the same origin. Our statistical analysis shows that the ratio between the detection rates of Class II and Class I methanol masers is basically the same in high and low sources. Therefore, both maser types seem to be equally associated with each evolutionary phase. In contrast, all maser species (including H2O) have about three times higher detection rates in high than in low sources. This could indicate that the phenomena from which all masers originate become progressively more active with time during the earliest evolutionary phases of a high-mass star-forming region.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - ISM: molecules - masers

Simbad objects: 307

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Number of rows : 307
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IRAS 00070+6503 * 00 09 40.9442347800 +65 19 54.290610516           ~ 18 0
2 IRAS 00117+6412 HII 00 14 26.61 +64 28 30.3           ~ 40 0
3 SH 2-172 HII 00 15 29.1 +61 14 41           ~ 30 0
4 GM 1-33 HH 00 36 47.5 +63 29 02           ~ 124 0
5 IRAS 00420+5530 Y*? 00 44 57.31 +55 47 18.1           ~ 61 0
6 IRAS 00484+6531 IR 00 51 33.0 +65 47 58           ~ 12 0
7 IRAS 00554+6524 IR 00 58 39.0 +65 40 42           ~ 12 0
8 SH 2-186 HII 01 08 50.51 +63 07 34.2           ~ 45 1
9 IRAS 01420+6401 HII 01 45 40.16013 +64 16 09.0770           ~ 32 1
10 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
11 IRAS 02383+6241 HII 02 42 21.87840 +62 54 03.3160           ~ 32 1
12 [KSP2003] J024715.43+603049.0 Y*O 02 47 15.43 +60 30 49.0           ~ 16 0
13 SH 2-201 HII 03 03 17.9 +60 27 52           ~ 118 0
14 IRAS 03064+5638 HII 03 10 15.3 +56 50 18           ~ 28 0
15 IRAS 03211+5446 HII 03 24 59.1 +54 57 25           ~ 28 0
16 LEDA 2797734 G 03 39 14.9 +55 59 33           ~ 21 0
17 GN 03.44.8 RNe 03 48 47.4 +55 54 37           ~ 8 0
18 IRAS 03448+5545 mul 03 48 47.9 +55 54 45           ~ 9 0
19 IRAS 04000+5052 HII 04 03 49.3 +51 00 47           ~ 26 1
20 IRAS 04034+5116 Y*O 04 07 10.99176 +51 24 41.1012           ~ 19 1
21 Cl Waterloo 1 OpC 04 18 45.9 +52 51 55           ~ 85 0
22 EM* LkHA 101 Em* 04 30 14.4355820328 +35 16 23.983198932   17.91 15.71 13.33   F 376 1
23 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
24 IRAS 04579+4703 Y*O 05 01 39.661 +47 07 21.92           ~ 51 0
25 LBN 784 HII 05 13 25.5 +37 27 01           ~ 83 0
26 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 75 0
27 IRAS 05168+3634 mul 05 20 16.2 +36 37 21           ~ 48 0
28 6C 051949+335341 HII 05 23 09.58 +33 58 14.1           ~ 26 1
29 IRAS 05236+3828 IR 05 27 06.7 +38 31 18           ~ 10 0
30 GAL 174.20-00.08 Cld 05 30 45.9 +33 47 56           ~ 210 2
31 HD 245259 * 05 36 40.8165180720 +31 51 16.220907000   11.0 10.5     B8 19 1
32 NGC 1985 RNe 05 37 47.8 +31 59 24           ~ 145 2
33 IRAS 05351+3549 HII 05 38 28.1 +35 51 15           ~ 21 0
34 CPM 18 Y*O 05 38 47.2 +30 41 28           ~ 26 0
35 IRAS 05358+3543 Y*O 05 39 09.92 +35 45 17.2           ~ 171 0
36 IRAS 05373+2349 Y*O 05 40 24.2280641304 +23 50 54.705306336           ~ 68 1
37 Mol 12 Rad 05 40 24.4 +23 50 54           ~ 50 0
38 RAFGL 5165 IR 05 41 37.4 +35 48 49           ~ 21 0
39 IRAS 05480+2545 HII 05 51 10.8 +25 46 14           ~ 34 0
40 IRAS 05490+2658 Y*O 05 52 12.9 +26 59 33           ~ 51 0
41 GAL 192.16-03.82 HII 05 58 13.4 +16 32 00           ~ 145 1
42 MSX6C G188.9696-01.9380 Y*O 05 58 24.452 +20 13 57.08           ~ 21 0
43 GM 1-6 HII 06 01 54.758 +26 25 00.33           ~ 18 0
44 2MASS J06032391+3014112 G 06 03 23.92 +30 14 11.2           ~ 15 0
45 LBN 180.71+04.30 RNe 06 04 34.3 +30 30 40           ~ 25 0
46 IRAS 06055+2039 ISM 06 08 32.1 +20 39 18           ~ 57 0
47 RAFGL 6366S HII 06 08 41.0 +21 31 01           ~ 95 0
48 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 125 0
49 IRAS 06061+2151 SFR 06 09 07.8 +21 50 39           ~ 87 0
50 IRAS 06063+2040 HII 06 09 21 +20 39.4           ~ 44 0
51 RAFGL 5184 IR 06 09 51.7 +20 30 04           ~ 40 0
52 IRAS 06084+1727 HII 06 11 24.5 +17 26 26           ~ 17 0
53 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
54 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
55 RAFGL 5186 HII 06 13 16.34 +15 22 42.2           ~ 29 1
56 IRAS 06104+1524A HII 06 13 21.40 +15 23 57.2           ~ 22 0
57 IRAS 06105+1756 HII 06 13 28.33753 +17 55 33.0170           ~ 30 0
58 LEDA 136208 G 06 14 24.1 +17 44 39           ~ 38 0
59 IRAS 06117+1350 HII 06 14 37 +13 49.6           ~ 56 0
60 IRAS 06155+2319A HII 06 18 35.2 +23 18 11           ~ 28 0
61 EM* MWC 137 Ae* 06 18 45.5220873216 +15 16 52.244494608 12.89 13.30 13.759 11.67 10.31 sgB[e]d 259 1
62 IRAS 06291+0421 IR 06 31 48.48 +04 19 30.7           ~ 29 1
63 NGC 2245 RNe 06 32 41.3 +10 09 34   11       A0 61 0
64 NGC 2247 RNe 06 33 04.4 +10 19 21   8.5       ~ 70 0
65 IRAS 06308+0402 Y*O 06 33 31.1 +04 00 07           ~ 48 1
66 IRAS 06314+0427 IR 06 34 04.92 +04 25 00.1           ~ 25 1
67 IRAS 06382+0939 Y*O 06 41 02.81160 +09 36 16.1712         19.89 ~ 93 0
68 IRAS 06568-0411 Y*? 06 59 22.0710151368 -04 15 40.673660796           ~ 18 0
69 IRAS 06584-0852 Y*O 07 00 50.94192 -08 56 30.1812           ~ 37 0
70 LBN 1037 RNe 07 05 16.9 -12 20 02           ~ 26 0
71 IRAS 07069-1045 HII 07 09 20.6 -10 50 26           ~ 16 0
72 IRAS 07284-1511 IR 07 30 42.5 -15 17 40           ~ 11 0
73 RAFGL 5233 IR 07 31 47.6 -19 21 48           ~ 10 0
74 SH 2-307 HII 07 35 33 -18 45.6           ~ 61 2
75 BRAN 66A RNe 07 44 57.8947652376 -25 30 42.178944888   15.41 14.57 14.92 13.47 ~ 29 1
76 Cl Ruprecht 32 OpC 07 45 12 -25 32.3   8.44 8.4     ~ 41 0
77 GAL 359.977+00.168 Y*O 17 44 53.4 -28 52 20           ~ 24 0
78 IRAS 17450-2742 IR 17 48 10 -27 43.2           ~ 17 0
79 RAFGL 2009 IR 17 48 47.1 -28 51 50           ~ 13 0
80 IRAS 17495-2624 IR 17 52 41.9 -26 25 32           ~ 10 0
81 IRAS 17504-2519 Y*O 17 53 33.7425042749 -25 19 50.366208103           ~ 13 0
82 IRAS 17527-2439 HII 17 55 49.1 -24 40 20           ~ 18 0
83 IRAS 17571-2328 MIR 18 00 15.76368 -23 28 53.5476           ~ 10 0
84 IRAS 17580-2215 mul 18 01 02.2 -22 15 46           ~ 7 0
85 IRAS 17582-2234 Y*O 18 01 18.52464 -22 34 57.5364           ~ 18 0
86 IRAS 17589-2312 HII 18 01 57.1 -23 12 37           ~ 28 0
87 IRAS 18014-2428 IR 18 04 29.6 -24 28 47           ~ 15 0
88 RAFGL 2059 Y*O 18 04 53.1586569336 -24 26 41.642012796 19.905 21.910 18.914   14.078 ~ 146 0
89 IRAS 18024-2119 IR 18 05 25.4 -21 19 41           ~ 17 0
90 IRAS 18024-2231 IR 18 05 30.6 -22 31 36           ~ 10 0
91 IRAS 18026-2145 IR 18 05 37.9 -21 45 07           ~ 6 0
92 IRAS 18027-2202 IR 18 05 46.3 -22 01 57           ~ 8 0
93 ISOGAL-P J180658.0-205150 AB* 18 06 57.95832 -20 51 49.9608           O-rich 10 0
94 IRAS 18043-2153 IR 18 07 23.3 -21 53 01           ~ 6 0
95 IRAS 18048-2019 HII 18 07 51.6 -20 18 36           ~ 20 1
96 [WBH98] 18048-2019 HII 18 07 51.7 -20 18 35           ~ 17 0
97 IRAS 18054-1818 IR 18 08 24.1 -18 17 35           ~ 5 0
98 IRAS 18078-1928 IR 18 10 48.7 -19 27 42           ~ 9 0
99 AGAL G012.418+00.506 cor 18 10 51.09792 -17 55 49.6272           ~ 74 0
100 IRAS 18081-2138 IR 18 11 12 -21 38.9           ~ 9 0
101 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
102 IRAS 18102-1800 HII 18 13 12.2 -17 59 35           ~ 24 0
103 IRAS 18115-1701 IR 18 14 25.7 -17 00 54           ~ 7 0
104 IRAS 18123-1203 HII 18 15 07.3 -12 02 42           ~ 15 0
105 IRAS 18122-1751 IR 18 15 12.2 -17 50 01           ~ 8 0
106 IRAS 18131-1606 MIR 18 16 01.56960 -16 05 08.8332           ~ 10 0
107 IRAS 18132-1638 Y*O 18 16 08.44272 -16 37 06.7404           ~ 19 0
108 IRAS 18134-1942 HII 18 16 22.1327 -19 41 27.219           ~ 72 0
109 IRAS 18136-1347 mul 18 16 28.6 -13 46 33           ~ 9 0
110 IRAS 18144-1723 IR 18 17 24.4 -17 22 13           ~ 35 0
111 IRAS 18145-1557 HII 18 17 27.02 -15 56 22.9           ~ 13 0
112 IRAS 18151-1208 Y*O 18 17 58.1254 -12 07 24.893           ~ 114 0
113 IRAS 18153-1651 IR 18 18 16.0 -16 50 39           ~ 22 0
114 IRAS 18156-1343 IR 18 18 28.6 -13 42 22           ~ 10 0
115 IRAS 18159-1550 HII 18 18 47.30 -15 48 57.9           ~ 27 0
116 GAL 014.33-00.64 HII 18 18 53.5 -16 47 39           ~ 75 0
117 IRAS 18160-1641 IR 18 18 57.3 -16 40 16           ~ 4 0
118 AGAL G014.891-00.404 Y*O 18 19 07.4495 -16 11 34.047           ~ 42 0
119 IRAS 18167-1614 LP? 18 19 43.1791079424 -16 13 10.344984960           ~ 10 0
120 IRAS 18171-1548 MIR 18 20 06.400 -15 46 43.91           ~ 8 0
121 IRAS 18181-1534 IR 18 20 59.0 -15 33 11           ~ 6 0
122 IRAS 18195-1407 IR 18 22 24.5 -14 05 33           ~ 7 0
123 IRAS 18197-1351 IR 18 22 36.8 -13 50 11           ~ 11 0
124 IRAS 18198-1429 HII 18 22 41.8 -14 27 35           ~ 7 0
125 IRAS 18212-1320 IR 18 24 04.7 -13 19 16           ~ 12 0
126 IRAS 18224-1228 IR 18 25 12.7 -12 27 10           ~ 9 0
127 IRAS 18230-1248 IR 18 25 51.8 -12 46 15           ~ 7 0
128 GAL 019.36-00.02 HII 18 26 24.3 -12 03 47           ~ 39 0
129 MMB G019.755-00.128 Y*O 18 27 31.602 -11 45 55.17           ~ 54 0
130 IRAS 18248-1218 IR 18 27 37.9 -12 16 29           ~ 5 0
131 IRAS 18256-0742 IR 18 28 20.5 -07 40 22           ~ 14 0
132 IRAS 18258-0737 HII 18 28 34.1 -07 35 31           ~ 17 0
133 IRAS 18265-1517 out 18 29 24.8 -15 15 49           ~ 67 0
134 IRAS 18278-1009 Y*O 18 30 36.0537219097 -10 07 09.780190865           ~ 41 0
135 IRAS 18288-0158 IR 18 31 26.7 -01 56 35           ~ 8 1
136 IRAS 18310-0825 HII 18 33 47.9 -08 23 52           ~ 33 0
137 V* V481 Sct s*b 18 33 55.2781965336 -06 58 38.631350604           LBV_B[e]: 50 0
138 IRAS 18314-0517 AB? 18 34 06.30120 -05 14 46.9212           ~ 7 0
139 IRAS 18314-0820 HII 18 34 09.0 -08 17 52           ~ 9 0
140 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 231 0
141 IRAS 18317-0513 HII 18 34 25.62000 -05 10 50.3400           ~ 32 0
142 GAL 023.24-00.24 HII 18 34 29.9 -08 43 23           ~ 23 0
143 IRAS 18318-0741 IR 18 34 30.8 -07 38 54           ~ 7 0
144 IRAS 18355-0550 IR 18 38 13.6 -05 48 17           ~ 6 0
145 [JD2012] G025.460-00.215 HII 18 38 30.0 -06 44 30           ~ 14 0
146 IRAS 18360-0537 HII 18 38 40.3 -05 35 06           ~ 27 0
147 IRAS 18363-0554 Rad 18 39 03.7 -05 52 15           ~ 10 0
148 GAL 026.60-00.02 HII 18 39 55.9 -05 38 45           ~ 34 1
149 IRAS 18396-0431 Rad 18 42 18.8 -04 28 37           ~ 14 0
150 2MASS J18432852-0350193 Y*O 18 43 28.52 -03 50 19.4           ~ 13 0
151 IRAS 18408-0348 HII 18 43 31.1 -03 44 57           ~ 17 0
152 IRAS 18411-0312 IR 18 43 46.4 -03 09 55           ~ 5 0
153 IRAS 18424-0329 Rad 18 45 03.3 -03 26 49           ~ 12 0
154 IRAS 18441-0134 HII 18 46 44.3 -01 30 55           ~ 12 0
155 IRAS 18445-0222 HII 18 47 10.6 -02 19 08           ~ 31 0
156 IRAS 18463-0052 Y*O 18 48 52.8 -00 49 02           ~ 11 0
157 IRAS 18488+0000 IR 18 51 24.8 +00 04 19           ~ 32 0
158 GAL 034.4+00.23 HII 18 53 17.4 +01 24 55           ~ 93 1
159 RAFGL 5542 Y*O 18 53 37.88832 +01 50 30.5844           ~ 78 0
160 IRAS 18517+0437 SFR 18 54 13.8 +04 41 32           ~ 89 0
161 [ERG2015] 6375 smm 18 55 16.778 +03 05 07.47           ~ 30 0
162 IRAS 18532+0047 Rad 18 55 50.6 +00 51 22           ~ 18 0
163 IRAS 18537+0145 IR 18 56 15.0 +01 49 03           ~ 9 0
164 IRAS 18544+0112 HII 18 56 59.8 +01 16 20           ~ 11 0
165 IRAS 18551+0302 bub 18 57 42.1 +03 06 04           ~ 21 1
166 IRAS 18565+0349 Rad 18 59 03.4 +03 53 22           ~ 16 0
167 IRAS 18566+0408 Y*O 18 59 09.95520 +04 12 15.6240           ~ 143 0
168 AGAL G040.121+01.500 HII 18 59 14 +07 04.9   13.60 12.74     ~ 35 0
169 IRAS 18571+0349 Rad 18 59 40.0 +03 53 35           ~ 15 0
170 IRAS 18571+0326 IR 18 59 40.2 +03 30 29           ~ 8 0
171 IRAS 18586+0106 Rad 19 01 10.6 +01 11 16           ~ 19 0
172 IRAS 18596+0536 HII 19 02 06.5 +05 40 33           ~ 10 0
173 IRAS 19001+0402 HII 19 02 36.2 +04 06 58           ~ 10 0
174 HRDS G038.643-00.227 bub 19 02 40.4 +04 58 13           ~ 19 0
175 IRAS 19012+0505 mul 19 03 43.5 +05 09 49           ~ 31 0
176 [CPA2006] N75 bub 19 03 47.1 +05 09 27           ~ 40 0
177 IRAS 19023+0538 IR 19 04 49.0 +05 42 40           ~ 7 0
178 IRAS 19043+0726 Rad 19 06 47.7 +07 31 38           ~ 16 0
179 IRAS 19045+0518 Y*O 19 06 59.71488 +05 22 55.3152           ~ 16 0
180 [BNM96] 042.096+0.354 Y*O 19 07 00.527 +08 18 44.48           ~ 17 0
181 IRAS 19077+0839 Cld 19 10 09.6 +08 44 11           ~ 11 0
182 IRAS 19088+0902 Rad 19 11 15.9 +09 07 27           ~ 22 0
183 IRAS 19092+0841 Rad 19 11 37.4 +08 46 30           ~ 30 0
184 IRAS 19094+0944 mul 19 11 52.0 +09 49 46           ~ 18 0
185 IRAS 19118+0945 MIR 19 14 14.90664 +09 50 43.5156           ~ 19 0
186 IRAS 19120+1148 Cld 19 14 22.1 +11 53 40           ~ 6 0
187 IRAS 19124+1106 IR 19 14 45 +11 12.1           ~ 26 0
188 IRAS 19138+1138 * 19 16 08.84304 +11 44 17.5020           ~ 11 0
189 NVSS J192038+160225 Rad 19 20 38.3 +16 02 36           ~ 9 1
190 IRAS 19186+1440 IR 19 20 57.0 +14 46 40           ~ 11 0
191 IRAS 19198+1423 HII 19 22 07.844 +14 29 19.72           ~ 13 0
192 IRAS 19202+1412 IR 19 22 31.5 +14 18 31           ~ 6 0
193 2MASS J19233684+1728589 Y*O 19 23 36.8145280608 +17 28 58.953209844           ~ 52 0
194 IRAS 19214+1458 HII 19 23 46.1 +15 04 51           ~ 11 0
195 IRAS 19230+1341 HII 19 25 22.1 +13 47 20           ~ 12 1
196 IRAS 19282+1814 HII 19 30 28.1 +18 20 53           ~ 38 0
197 IRAS 19282+1742 HII 19 30 30.5 +17 48 30           ~ 7 0
198 IRAS 19294+1649 Y*O 19 31 45.0625212288 +16 55 59.985972840           ~ 12 0
199 IRAS 19295+1637 Cld 19 31 50.9 +16 43 29           ~ 9 0
200 HRDS G055.159-00.298 HII 19 34 45.7 +19 31 46           ~ 13 0
201 IRAS 19332+2028 HII 19 35 26.37 +20 35 01.0           ~ 15 1
202 IRAS 19343+2026 MIR 19 36 31.05216 +20 33 09.2196           ~ 19 1
203 IRAS 19368+2239 HII 19 38 57.0 +22 46 27           ~ 21 0
204 MSX6C G059.6032+00.9116 HII 19 39 34.8 +23 59 51           ~ 22 0
205 NGC 6813 ISM 19 40 22.1 +27 18 34           ~ 17 0
206 IRAS 19388+2357 Y*O 19 40 59.1 +24 04 46           ~ 32 0
207 HRDS G061.720+00.864 HII 19 44 23.489 +25 48 41.55           ~ 20 1
208 NVSS J194800+245018 Rad 19 48 00.14 +24 50 18.6           ~ 13 1
209 IRAS 19462+2759 HII 19 48 14.1 +28 07 24           ~ 6 0
210 BWE 1949+2613 HII 19 52 00.2 +26 21 12           ~ 13 1
211 IRAS 19542+3004 IR 19 56 13.2 +30 12 56           ~ 7 0
212 IRAS 19560+3135 IR 19 58 03.142 +31 44 06.97           ~ 12 0
213 B2.1 1959+33 A Y*O 20 01 09.88 +33 11 12.2           ~ 27 1
214 IRAS 20028+2903 HII 20 04 52.77168 +29 11 40.1028           ~ 21 0
215 IRAS 20051+3435 * 20 07 04.5 +34 44 45           ~ 31 0
216 IRAS 20050+2720 Y*O 20 07 06.549 +27 28 49.10           ~ 107 0
217 NAME IRAS 20050+2720 Cluster Cl* 20 07 06.7 +27 28 53           ~ 83 0
218 IRAS 20056+3350 Mas 20 07 31.5 +33 59 39           ~ 30 0
219 IRAS 20062+3550 HII 20 08 09.8 +35 59 20           ~ 21 0
220 IRAS 20081+2720 HII 20 10 11.5 +27 29 06           ~ 43 1
221 IRAS 20099+3640 IR 20 11 46.3969271064 +36 49 35.253504336           ~ 17 0
222 IRAS 20103+3633 HII 20 12 13.9 +36 42 59           ~ 14 0
223 IRAS 20106+3545 IR 20 12 31.3 +35 54 46           ~ 17 0
224 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 469 0
225 IRAS 20149+3440 OH* 20 16 50.5560026832 +34 49 26.887811124       12.816   O-rich 18 0
226 GSC 03151-00990 Y*? 20 17 08.1153452208 +38 59 29.492418660   14.93 14.13 14.67   ~ 13 0
227 IRAS 20160+3636 HII 20 17 56.1 +36 45 33           ~ 21 0
228 IRAS 20173+3714 SFR 20 19 10.6 +37 23 31           ~ 9 0
229 IRAS 20180+3558 IR 20 19 58.0 +36 07 37           ~ 11 0
230 LBN 077.61+01.59 HII 20 20 39.3 +39 37 52           ~ 80 0
231 IRAS 20190+4102 IR 20 20 47.5015035336 +41 12 07.051633128           ~ 8 0
232 IRAS 20205+3948 Y*O 20 22 21.9 +39 58 05           ~ 29 0
233 CPM 35 cor 20 23 23.855 +41 17 40.49           ~ 58 0
234 IRAS 20217+3947 * 20 23 32.2802944368 +39 57 24.820192908           ~ 12 0
235 IRAS 20220+3728 Y*O 20 23 55.22 +37 38 12.3           ~ 50 3
236 GM 1-10 RNe 20 24 11.74318 +35 51 30.5700           ~ 19 1
237 IRAS 20227+4154 HII 20 24 31.4 +42 04 17           ~ 32 0
238 IRAS 20228+4215 IR 20 24 34.4 +42 25 01           ~ 17 0
239 IRAS 20243+3853 HII 20 26 11.61 +39 03 32.8           ~ 18 0
240 IRAS 20261+3825 Y*O 20 28 02.0190454714 +38 35 52.768675624           ~ 17 1
241 IRAS 20264+4042 IR 20 28 12.4 +40 52 28           ~ 23 0
242 GAL 077.96-00.01 HII 20 29 36.72 +39 01 21.9           ~ 42 1
243 IRAS 20278+3521 IR 20 29 46.8321719328 +35 31 42.045300408           ~ 18 0
244 IRAS 20281+4038 IR 20 29 54.8 +40 48 52           ~ 14 0
245 IRAS 20286+4105 HII 20 30 29.94 +41 15 50.8           ~ 57 1
246 IRAS 20293+4007 Cld 20 31 07.9 +40 17 23           ~ 10 0
247 [BNM96] 079.296+0.284 HII 20 32 27.9387239688 +40 16 07.617565056           ~ 32 0
248 IRAS 20306+3749 Y*O 20 32 34.50 +37 59 37.4           ~ 14 0
249 IRAS 20319+3958 HII 20 33 49.24632 +40 08 44.1924           ~ 45 1
250 ECX6-27 HII 20 33 55.7 +41 22 46           ~ 27 1
251 IRAS 20327+4120 Y*O 20 34 30.882 +41 30 39.10           ~ 12 0
252 IRAS 20332+4124 HII 20 35 00.5 +41 34 48           ~ 38 0
253 IRAS 20333+4102 Cld 20 35 09.5 +41 13 18           ~ 30 0
254 IRAS 20337+4104 IR 20 35 34.7 +41 15 22           ~ 7 0
255 IRAS 20343+4129 HII 20 36 07.1 +41 40 01           ~ 58 0
256 IRAS 20350+4126 HII 20 36 52.6 +41 36 33           ~ 40 1
257 IRAS 20406+4555 HII 20 42 21 +46 05.9           ~ 17 0
258 IRAS 20444+4629 MoC 20 45 59.64 +46 40 06.2           ~ 25 0
259 IRAS 20446+4613 HII 20 46 17.2989881976 +46 24 35.183688840           ~ 20 1
260 IRAS 21020+4939 IR 21 03 42.3 +49 51 53           ~ 11 0
261 IRAS 21036+4927 IR 21 05 15.6 +49 40 01           ~ 10 0
262 IRAS 21046+5110 IR 21 06 16.3 +51 22 13           ~ 17 0
263 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
264 IRAS 21078+5211 HII 21 09 31.03 +52 24 16.1           ~ 65 0
265 IRAS 21080+4758 Y*O 21 09 45.87672 +48 10 58.9116           ~ 16 0
266 IRAS 21202+5157 HII 21 21 53.577 +52 10 47.30           ~ 26 0
267 IRAS 21270+5423 IR 21 28 42.0 +54 36 51           ~ 20 1
268 SH 2-128 HII 21 32 09.9 +55 52 53           ~ 173 1
269 IRAS 21307+5049 Y*O 21 32 30.59280 +51 02 16.0368           ~ 49 0
270 PN K 4-45 Y*O 21 35 21.061 +53 47 11.21           ~ 57 2
271 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 123 0
272 EM* LkHA 234 Ae* 21 43 06.8218113480 +66 06 54.202272804 13.65 13.61 12.73 11.98 11.20 B5Ve 295 0
273 IRAS 21418+5403 HII 21 43 30.000 +54 16 57.94           ~ 13 0
274 IRAS 21519+5613 HII 21 53 38.8 +56 27 53           ~ 40 0
275 IRAS 21526+5728 HII 21 54 18.4 +57 42 51           ~ 23 0
276 IRAS 21548+5747 IR 21 56 29.7 +58 01 35           ~ 14 0
277 IRAS 22147+5948 MIR 22 16 29.32512 +60 03 31.0824           ~ 21 0
278 LBN 102.79-00.92 HII 22 19 09.0 +56 04 45           ~ 109 0
279 IRAS 22172+5549 Y*O 22 19 09.14787 +56 05 00.0380           ~ 105 0
280 IRAS 22187+5559 HII 22 20 35.0 +56 14 48           ~ 18 0
281 LDN 1204A HII 22 21 26.68 +63 51 38.2           ~ 120 0
282 IRAS 22267+6244 HII 22 28 29.3 +62 59 44           ~ 30 0
283 IRAS 22272+6358A Cld 22 28 52.2 +64 13 43           ~ 53 0
284 IRAS 22305+5803 Y*O 22 32 23.972 +58 18 57.91           ~ 39 0
285 IRAS 22344+5909 MIR 22 36 20.53128 +59 24 54.7992           ~ 12 0
286 BD+57 2615 Be* 22 47 49.5706150416 +58 08 49.516370232   10.44 10.14     B1-3Ve 73 0
287 BG 2247+59 LP? 22 49 29.0034646608 +59 54 56.182749876           ~ 111 1
288 IRAS 22506+5944 Y*O 22 52 38.09760 +60 01 01.1928           ~ 60 0
289 CPM 38 Y*O 22 55 59.780 +58 14 42.49           ~ 43 0
290 IRAS 22542+5815 IR 22 56 17.0 +58 31 13           ~ 20 0
291 GAL 109.88+02.11 HII 22 56 19.4 +62 02 01           ~ 76 0
292 IRAS 22551+6221 HII 22 57 05.6 +62 37 48           ~ 42 0
293 NAME SH 2-152 SE * 22 58 42.6 +58 47 45           ~ 53 1
294 [BNM96] 109.098-0.346 HII 22 59 05.5344256224 +59 28 23.280817692           ~ 45 0
295 IRAS 23026+5948 IR 23 04 45.4557529824 +60 04 37.582742172           ~ 24 0
296 IRAS 23042+6000 IR 23 06 22.2177213936 +60 16 17.842393560           ~ 21 0
297 IRAS 23134+6131 MIR 23 15 33.73440 +61 47 50.8632           ~ 16 0
298 IRAS 23140+6121 IR 23 16 11.7 +61 37 45           ~ 35 0
299 IRAS 23146+5954 IR 23 16 48.9 +60 10 46           ~ 20 0
300 EM* MWC 1080 Ae* 23 17 25.5895018656 +60 50 43.444557384   13.24 11.85 11.251   B0eq 331 0
301 IRAS 23314+6033 HII 23 33 43.8650890512 +60 50 26.959478136           ~ 31 0
302 IRAS 23330+6437 EB* 23 35 23.4690987192 +64 54 29.223307296           ~ 13 0
303 Mol 160 Rad 23 40 54.5 +61 10 28           ~ 121 0
304 IRAS 23448+6010 SFR 23 47 19.8 +60 27 23           ~ 19 0
305 IRAS 23504+6012 IR 23 52 58.2 +60 28 45           ~ 17 0
306 IRAS 23507+6230 IR 23 53 12.9 +62 47 00           ~ 19 0
307 IRAS 23545+6508 * 23 57 05.2 +65 25 11           B 52 0

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