Registry · deep sky

Cl* Westerlund 1 W 18

BlueSG SIMBAD s*b B0.5Ia 13 papers

harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.

Right ascension: 16h 47m 05.71s
Declination: −45° 50′ 50.5″
Galactic l, b: 339.56, -0.4053
Magnitude V: 17.61
Parallax: 0.4448 mas
Proper motion: -2.35, -3.986 mas/yr

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
Cl* Westerlund 1 W 37	Star	4.363″	19.11
Cl* Westerlund 1 W 17	BlueSG	5.774″	18.87
Cl* Westerlund 1 W 36	BlueSG	8.036″	18.89
Cl* Westerlund 1 W 27	BlueSG	10.75″	17.94
Cl* Westerlund 1 W 19	BlueSG	12.45″	18.78
Cl* Westerlund 1 W 16	Supergiant	12.6″	16.25
Cl* Westerlund 1 W 34	BlueSG	14.11″	18.15
2MASS J16470540-4550367	RedSG	14.21″	16.79
WR 77s	WolfRayet*	14.36″	19.81
2MASS J16470625-4551042	BlueSG	14.66″	20.5
Cl* Westerlund 1 CN B	WolfRayet*	14.76″	20.99

Provenance

where this card came from

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/cl-westerlund-1-w-18 · Registry entry updated 2026-08-14.