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Table 2

Stars with observed spectra.

ID RA (J2000) Dec (J2000) J H K S Spectral type A K Distance
[hms] [°′′′] [mag] [mag] [mag] [mag] [kpc]

OB-type dwarfs:
2b 18 56 11.98 +07 53 38.1 11.246 ± 0.008 9.911 ± 0.008 9.196 ± 0.006 O9–9.5 V 1.47 1.77
3b 18 56 11.99 +07 53 48.1 12.875 ± 0.003 11.419 ± 0.004 10.767 ± 0.004 B1 V 1.54 2.08
1a 18 56 11.05 +07 59 31.0 13.926 ± 0.014 12.519 ± 0.010 11.744 ± 0.006 B2–3 V 1.52 2.47
2a 18 56 08.31 +08 00 14.3 12.318 ± 0.018 11.217 ± 0.002 10.676 ± 0.005 B2–3 V 1.16 ± 0.01 1.52
9a 18 56 04.21 +07 57 17.9 18.526 ± 0.014 14.628 ± 0.046 12.296 ± 0.020 B2–3 V 4.19 0.93
12a 18 56 00.73 +07 56 24.3 13.554 ± 0.028 12.404 ± 0.005 11.818 ± 0.007 B3 V 1.21 ± 0.02 2.13
1b 18 56 10.97 +07 53 17.6 13.954 ± 0.005 12.620 ± 0.005 11.895 ± 0.006 B3 V 1.43 ± 0.02 2.00
4a 18 56 09.55 +07 58 08.3 14.370 ± 0.007 12.665 ± 0.007 11.734 ± 0.005 B3–5 V 1.80 ± 0.02 1.48
3a 18 56 14.12 +07 57 56.5 14.530 ± 0.007 12.575 ± 0.004 11.335 ± 0.011 B0–5 V 2.19 ± 0.03 1.68
8a 18 56 04.57 +07 57 26.1 18.489 ± 0.092 14.779 ± 0.033 12.289 ± 0.021 YSO

A, F, G dwarfs:
8b 18 56 13.22 +07 56 04.6 13.459 ± 0.003 11.847 ± 0.003 11.100 ± 0.005 A5 III–V 1.58 0.38
9b 18 56 13.86 +07 56 45.3 12.678 ± 0.005 11.254 ± 0.005 10.615 ± 0.010 F3–7 V 1.25 0.21± 0.00
6a 18 56 05.90 +07 57 50.9 11.926 ± 0.021 11.697 ± 0.004 11.597 ± 0.008 F6 V 0.04 0.61± 0.01
11a 18 56 00.29 +07 56 53.9 14.839 ± 0.009 13.253 ± 0.008 12.175 ± 0.006 F6–8 V 1.56 ± 0.02 0.40 ± 0.04
10a 18 56 01.09 +07 56 55.4 13.195 ± 0.031 12.627 ± 0.006 12.349 ± 0.008 F7 V 0.36 ± 0.02 0.74
5b 18 56 13.62 +07 53 55.6 11.613 ± 0.002 11.022 ± 0.002 10.810 ± 0.027 F6–G1 V 0.35 ± 0.02 0.33
4b 18 56 14.93 +07 53 30.7 14.950 ± 0.005 12.661 ± 0.006 11.483 ± 0.004 G2–3 V 2.19 0.15
7b 18 56 18.78 +07 54 30.9 13.445 ± 0.005 12.788 ± 0.011 12.508 ± 0.009 G8–K0 V 5.44

Giant stars:
5a 18 56 11.00 +07 57 25.6 12.121 ± 0.018 10.265 ± 0.013 9.188 ± 0.021 G4–7 III 1.58 ± 0.02 0.57
7a 18 56 06.61 +07 57 12.0 17.490 ± 0.036 13.989 ± 0.010 12.225 ± 0.005 K0–2 III 3.02 1.67
6b 18 56 16.22 +07 54 46.8 17.764 ± 0.051 13.576 ± 0.010 11.606 ± 0.004 M0–1 III 3.39 3.11

Notes.We include the equatorial coordinates, infrared magnitudes (J, H, KS), and spectral type for each star. For those stars with estimated luminosity class, we have included the extinction and distance estimates.

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