Registry · deep sky

Cl* Westerlund 1 W 17

BlueSG SIMBAD s*b O9Iab 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 06.25s
Declination: −45° 50′ 49.3″
Galactic l, b: 339.56, -0.4063
Magnitude V: 18.87
Parallax: 0.2227 mas
Redshift z: -0.00012298
Radial velocity: -36.87 km/s
Proper motion: -2.013, -3.736 mas/yr

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
Cl* Westerlund 1 W 37	Star	3.077″	19.11
Cl* Westerlund 1 W 18	BlueSG	5.774″	17.61
Cl* Westerlund 1 W 16	Supergiant	8.074″	16.25
WR 77s	WolfRayet*	10.67″	19.81
Cl* Westerlund 1 W 36	BlueSG	13.52″	18.89
Cl* Westerlund 1 W 27	BlueSG	13.88″	17.94
2MASS J16470625-4551042	BlueSG	14.66″	20.5
2MASS J16470540-4550367	RedSG	15.43″	16.79
Cl* Westerlund 1 W 25	BlueSG	16.64″	17.85
Cl* Westerlund 1 W 19	BlueSG	17.56″	18.78
Cl* Westerlund 1 CN B	WolfRayet*	18.02″	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-17 · Registry entry updated 2026-08-14.