Table 3: Ionising stars of the SFO objects, their relevant HII regions, positions and ionising fluxes.
SFO object HII region Ionising star $\alpha$ $\delta$ Spectral Projected distance
      (2000) (2000) Type to bright rim (Pc)
1 (S171/NGC 7822) BD +66 1675a 00 02 10.3 +67 24 32 O7V 3.7
2 (S171/NGC 7822) BD +66 1675 00 02 10.3 +67 24 32 O7V 16.9
3 (S171/NGC 7822) BD +66 1675 00 02 10.3 +67 24 32 O7V 5.3
4 (S185) HD 5394b 00 56 42.3 +60 43 00 B0IV 1.1
5 (S190/IC 1805) BD +60 502c 02 32 42.5 +61 27 22 O5V 14.9
    BD +60 504c 02 32 49.4 +61 22 42 O4V 16.1
    BD +60 507c 02 33 20.6 +61 31 18 O5V 17.1
6 (S190/IC 1805) BD +60 504 02 32 49.4 +61 22 42 O4V 20.5
7 (S190/IC 1805) BD +60 502 02 32 42.5 +61 27 22 O5V 14.6
    BD +60 504 02 32 49.4 +61 22 42 O4V 16.6
    BD +60 507 02 33 20.6 +61 31 18 O5V 11.4
8 (S190/IC 1805) BD +60 502 02 32 42.5 +61 27 22 O5V 12.4
    BD +60 504 02 32 49.4 +61 22 42 O4V 11.3
    BD +60 507 02 33 20.6 +61 31 18 O5V 11.1
9 (S190/IC 1805) BD +60 502 02 32 42.5 +61 27 22 O5V 15.0
    BD +60 504 02 32 49.4 +61 22 42 O4V 14.4
    BD +60 507 02 33 20.6 +61 31 18 O5V 13.1
10 (S199/IC 1848) HD 17505d 02 51 08.0 +60 25 04 O6V 12.3
11 (S199/IC 1848) HD 17505 02 51 08.0 +60 25 04 O6V 11.9
12 (S199/IC 1848) BD +60 586d 02 54 10.7 +60 39 03 O8III 3.9
13 (S199/IC 1848) BD +59 578d 02 59 23.2 +60 33 59 O7V 7.0
14 (S199/IC 1848) BD +59 578 02 59 23.2 +60 33 59 O7V 8.6
15 (S236/IC 410) HD 242908e 05 22 29.3 +33 30 50 O5V 22.1
    HD 242926e 05 22 40.1 +33 19 10 O6V 12.0
16 (S276) $\delta$ Orif 05 32 04.1 +00 21 55 O9.5I 37.3
    $\theta^{1}$ Orif 05 35 15.5 -05 23 19 O7V 26.7
    $\iota$ Orif 05 35 26.8 -05 54 31 O8.5II 26.9
17 (S264/$\lambda$ Ori) $\lambda$ Orif 05 35 08.2 +09 56 04 O5V 16.3
18 (S264/$\lambda$ Ori) $\lambda$ Ori 05 35 08.2 +09 56 04 O5V 17.0
19 (S277/IC 434) HD 37468g 05 38 44.8 -02 36 01 O9.5V 13.3
20 (S277/IC 434) HD 37468 05 38 44.8 -02 36 01 O9.5V 8.3
21 (S277/IC 434) HD 37468 05 38 44.8 -02 36 01 O9.5V 7.1
22 (S281) $\theta^{1}$ Orih 05 35 15.5 -05 23 19 O7V 6.5
    $\iota$ Orih 05 35 26.8 -05 54 31 O8.5II 8.1
23 (S249) BD +22 1303i 06 22 58.2 +22 51 46 O9V 8.3
24 (S275/NGC 2244) HD 46223j 06 32 09.3 +04 49 25 O5V 19.3
25 (S273/NGC 2264) HD 47839k 06 40 58.6 +09 53 45 O7V 4.7
26 (S296/CMaOBI) HD 54662l 07 09 20.2 -10 20 48 O7III 29.7
27 (S296/CMaOBI) HD 53456l 07 04 38.3 -11 31 27 BOV 3.9
28 (S296/CMaOBI) HD 53367l 07 04 25.5 -10 27 16 B0IV 2.1
29 (S296/CMaOBI) HD 53975 07 06 36.0 -12 23 38 O7.5V 9.5
30 (S49) BD -13 4927e 18 18 40.1 -13 45 18 O5V 1.0
31 (S117) HD 199579m 20 56 34.7 +44 55 29 O6V 20.5
32 (S131/IC 1396) HD 206267n 21 38 57.6 +57 29 21 O6V 11.3
33 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 10.5
34 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 12.1
35 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 14.5
36 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 4.9
37 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 11.9
38 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 10.4
39 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 12.6
40 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 13.4
41 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 13.5
42 (S131/IC 1396) HD 206267 21 38 57.6 +57 29 21 O6V 14.1
43 (S142/NGC 7380) HD 215835 22 46 54.2 +58 05 04 O5V 5.4
44 (S145) HD 213023o 22 26 52.4 +63 43 05 O9V 8.5
    BD 62 2078p 22 25 33.6 +63 25 03 O7.5V 13.8
Stars found to be at similar distances to, formally declared to be associated with or described as "probable members'' of relevant HII regions in the following references: a Crampton & Fisher (1974); b Savage et al. (1977); c Ishida (1970); d Hughes et al. (1978); e Humphreys (1978); f Reynolds & Ogden (1979); g Kuiper (1975); h O'Dell & Doi (2003); i Hardie et al. (1960); j Ogura & Ishida (1981); k Gies et al. (1997); l Claria (1974); m Bally & Scoville (1980); n Matthews (1979); o Chavarria-K. et al. (1994); p Sugitani et al. (2000).

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