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Table 1
Properties of the stars exciting the H ii regions in the observed field of view.
| H ii region | Star | Type | α,δ (J2000) | (δx,δy) | Parallax | Distance | VLSR |
| (′′,′′) | mas | pc | km s-1 | ||||
|
|
|||||||
| IC 434 | σOri | O9.5V B | 05h38m44.779s,−02°36′00.12′′ | (− 33.35,00.07) | 2.5806 ± 0.0088(1) | 387.5 ± 1.3(1) | 15.0 ± 1.6 |
| IC 435 | HD 38087 | B5V D | 05h43m00.573s,−02°18′45.38′′ | (+ 32.87,01.33) | 5.90 ± 1.29(2) | 169 ± 37(2) | 18.1 ± 4.5 |
| NGC 2023 | HD 37903 | B1.5V C | 05h41m38.388s,−02°15′32.48′′ | (+ 13.72,09.42) | 2.776 ± 0.271(3) | 362 ± 35(3) | −7.7 ± 2 |
| NGC 2024 | IRS2b | O8V-B2V | 05h41m45.50s,−01°54′28.7′′ | (+ 20.54,29.43) | – | 415(4) | – |
| Alnitak | O9.7Ib+B0III C | 05h40m45.527s,−01°56′33.26′′ | (+ 05.49,31.04) | 3.4 ± 0.2(5) | 294 ± 21(5) | 3.7 ± 1.3 | |
Notes.
(3)
Gaia DR1: Gaia Collaboration (2016b), Lindegren et al. (2016), Fabricius et al. (2016), Gaia Collaboration (2016a);
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