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Cl* Westerlund 1 W 23a

BlueSG SIMBAD s*b B2Ia+B:I? 20 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 02.58s
Declination: −45° 51′ 08.9″
Galactic l, b: 339.55, -0.4017
Magnitude V: 18.32
Parallax: 0.1635 mas
Redshift z: -0.00016937
Radial velocity: -50.78 km/s
Proper motion: -2.317, -3.298 mas/yr

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
Cl Westerlund 1	OpenCluster	2.658″	—
Cl* Westerlund 1 W 24	BlueSG	5.739″	18.71
Cl* Westerlund 1 W 47	BlueSG	8.722″	19.95
Cl* Westerlund 1 CN J	WolfRayet*	9.069″	—
Cl* Westerlund 1 W 12	YellowSG	10.59″	17.57
Cl* Westerlund 1 W 41	BlueSG	12.01″	17.87
[CRN2020] W1031	Star	14.84″	—
Cl* Westerlund 1 W 43a	BlueSG	15.15″	18.05
Cl* Westerlund 1 W 43	**	15.27″	—
Cl* Westerlund 1 W 46b	Star	15.48″	—
Cl* Westerlund 1 W 43b	BlueSG	15.86″	—

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-23a · Registry entry updated 2026-08-14.