Table 1: Stars with reddened, featureless spectra.
Star $\alpha (2000)$ $\delta(2000)$ J H $K_{\rm S}$ Vis. classification Other IDs Notes
10 20 31 42.15 42 25 53.2 6.212 5.467 5.039 B1Ib    
33 20 25 27.27 40 24 00.1 7.200 6.852 6.652   BD+39 4179  
36 20 38 20.40 41 56 56.4 7.839 7.086 6.686 B0II    
37 20 39 15.58 42 17 10.9 8.870 7.554 6.830     1
39 20 35 08.66 42 25 57.0 9.359 7.801 6.966     2
42 20 35 42.96 42 29 41.9 8.222 7.426 6.993     3
44 20 31 08.39 42 02 42.3 7.815 7.298 7.029 B0II A41 4
45 20 32 02.20 42 12 26.1 7.534 7.264 7.049 B0.2III BD+41 3794  
60 20 27 52.95 41 44 06.8 8.152 7.580 7.271 B0.2III    
62 20 23 22.84 40 09 22.5 7.581 7.421 7.286   HD 229202 5
65 20 35 10.62 42 20 22.6 7.829 7.510 7.326 B1III LS III +42 17 6
70 20 39 24.00 40 29 39.3 8.734 7.862 7.373      
72 20 26 10.44 39 51 51.9 8.745 7.847 7.388      
74 20 32 33.51 42 47 25.5 8.963 7.977 7.443      
75 20 41 05.74 39 55 19.5 8.526 7.806 7.448      
82 20 25 06.52 40 35 49.6 7.931 7.650 7.490 O9V BD+40 4159  
93 20 40 29.78 42 03 13.7 9.243 8.156 7.619     7
94 20 25 33.19 40 48 44.5 8.337 7.900 7.639 B1III    
96 20 26 46.79 40 05 57.0 8.955 8.073 7.655     8
97 20 38 21.72 41 57 06.8 8.755 8.037 7.680 B0III    
100 20 39 45.06 42 06 07.8 8.470 7.984 7.712 O9V    
101 20 27 17.57 39 44 32.6 8.100 7.822 7.727   LS II +39 53 9
108 20 23 14.54 40 45 19.3 8.157 7.932 7.783 B1V BD+40 4149 10
110 20 23 02.91 41 33 46.7 8.758 8.140 7.825 B1III    
129 20 29 29.76 39 21 22.4 9.538 8.523 8.003      
130 20 40 33.68 40 22 45.1 9.775 8.606 8.028      
131 20 28 45.54 40 17 04.0 9.239 8.456 8.043      
132 20 37 17.74 41 56 31.4 9.092 8.379 8.053      
133 20 27 49.25 40 17 00.4 8.705 8.310 8.079 B1III    
134 20 39 44.16 42 18 42.6 9.534 8.580 8.094     11
135 20 33 52.19 39 47 26.5 9.271 8.482 8.105      
137 20 23 07.58 40 46 09.0 8.480 8.244 8.126     10, 12
138 20 24 05.15 40 46 03.6 8.621 8.310 8.127 B0.5V LS III +40 15  
140 20 39 34.10 41 16 56.5 10.080 8.800 8.140     13
143 20 35 22.96 42 22 02.4 9.417 8.613 8.155     14
146 20 23 07.30 40 46 55.2 8.504 8.254 8.206     10
152 20 27 37.87 41 15 46.8 9.172 8.581 8.264 O9.5V    
156 20 41 15.71 41 52 06.9 10.218 8.988 8.289     15
159 20 26 24.88 40 01 41.4 9.044 8.569 8.322 O9.5V   16
164 20 26 19.75 39 51 42.5 9.344 8.723 8.349 O7V    
169 20 39 40.24 41 17 34.0 10.329 9.098 8.389     17
175 20 29 02.47 42 31 16.0 9.056 8.626 8.428 B1III    
181 20 26 11.89 40 02 22.4 9.282 8.746 8.464 B0III   18
183 20 29 18.68 39 36 15.8 9.793 8.910 8.471     19
185 20 22 50.95 41 13 50.7 9.785 8.973 8.519      
186 20 34 52.07 42 55 08.1 9.615 8.901 8.524      
189 20 33 50.76 39 59 38.7 9.675 8.925 8.541      
190 20 41 12.17 42 01 23.7 10.726 9.332 8.548     20
193 20 22 54.49 40 23 31.7 9.140 8.753 8.553 B0.2III    
196 20 27 39.82 40 40 38.6 8.938 8.673 8.579 B1V    
202 20 28 31.87 40 13 42.7 10.601 9.299 8.613      
204 20 35 29.68 42 16 24.3 10.669 9.308 8.618     21
205 20 35 18.14 42 23 48.4 10.052 9.075 8.620     22
206 20 25 28.89 40 12 54.2 9.058 8.750 8.627 B0III LS III +40 32 23
209 20 39 34.16 39 45 02.3 10.015 9.116 8.634      
219 20 22 54.30 40 27 41.2 9.085 8.806 8.700   HD 229167  
220 20 36 32.51 39 36 47.2 10.054 9.189 8.713     24
222 20 37 30.82 40 27 52.0 10.580 9.351 8.723      
227 20 38 05.37 42 11 14.2 9.964 9.162 8.740      
229 20 27 20.99 41 21 26.2 9.460 8.981 8.746 B1V    
230 20 41 43.65 41 31 45.2 10.090 9.224 8.767      
232 20 22 58.94 40 45 39.4 9.131 8.905 8.774 B1V   25
242 20 38 26.96 42 27 44.8 9.876 9.145 8.823     26
244 20 31 06.24 41 59 32.4 9.615 9.128 8.824 B1II    
246 20 26 40.87 40 59 46.9 11.198 9.652 8.829      
250 20 40 10.22 41 23 53.5 10.901 9.565 8.852     27
Notes
1: In DR 21, possibly associated to the radiosource WSRTGP 2037+4206 (Taylor et al. 1996).
2: In DR 17. 3: In DR 17. Brightest star in cluster 14 of Le Duigou & Knödlseder (2002).
4: In Comerón et al. (2002); classified as O9.7II by Hanson (2003).
5: Classified as O8V: by Morgan et al. (1955); X-ray emission (1989).
6: Possibly related to the HII region G081.3+01.1 in DR17.
7: In DR 23. Brightest star in cluster 15 of Le Duigou & Knödlseder (2002).
8: Possibly associated to DR 5.
9: Classified as O7V: by Vijapurkar & Drilling (1993).
10: Member of cluster NGC 6910.
11: In DR 21.
12: Classified as B0.5V by Hoag & Applequist (1965)
13: In DR 22, member of cluster 11 of Le Duigou & Knödlseder (2002).
14: In DR 17, member of cluster 12 of Le Duigou & Knödlseder (2002).
15: In cluster associated to DR 23 (Bica et al. 2003).
16: Possibly associated to DR 5.
17: In DR 22.
18: Possibly associated to DR 5.
19: Possibly associated to the radiosource MITGJ2029+3936 (Griffith et al. 1991).
20: Possibly associated to DR 23.
21: In DR 17.
22: In DR 17.
23: Possibly associated to DR 5.
24: Probably associated to IRAS 20346+3926A.
25: In cluster NGC 6910 (Delgado & Alfaro 2000).
26: In DR 21.
27: Possibly associated to DR 22.

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