A massive association around the obscured open cluster RSGC3

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Table 3

Properties of confirmed members of RSGC3.

ID	Co-ordinates		I^a	J^a	H^a	K_S^a	Spectral	Spectral	Spectral	E(J − K_S)	v_LSR
	RA	Dec.					Type (CO)	Type (TiO)	Type		(km s^-1)
S1	18 45 23.60	−03 24 13.9	13.5	8.55	6.54	5.58	RSG	M3	M3.5 Ib	1.80	+97
S2	18 45 26.54	−03 23 35.3	^b	8.53	6.62	5.75	M3 I	M2	M2 Ia	1.68	+104
S3	18 45 24.34	−03 22 42.1	13.7^c	8.54	6.43	5.35	M4 I	M4	M4 I	2.02	+99
S4	18 45 25.31	−03 23 01.1	13.7^c	8.42	6.39	5.31	M3 I	M2	M3 Ia	1.97	+93
S5	18 45 23.26	−03 23 44.1	13.8	8.51	6.52	5.52	M2 I	M4	M4 I	1.82	+84

Notes.

^(a)

JHK_S magnitudes from 2MASS. I magnitudes from USNO-B1.0.

^(b)

No USNO-B1.0 source, but the star is similarly bright to the other four members observed in the DSS2 I image.

^(c)

The magnitude corresponds to a blend of two stars in the DSS2 I image.

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