Registry · deep sky

Cl* Westerlund 1 W 55

BlueSG SIMBAD s*b B0Ia 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 46m 58.42s
Declination: −45° 51′ 31.3″
Galactic l, b: 339.53, -0.3966
Magnitude V: 18.03
Parallax: 0.1721 mas
Redshift z: -0.0001596
Radial velocity: -47.85 km/s
Proper motion: -2.333, -3.849 mas/yr

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
[CRN2020] W1015	Star	10.6″	19.24
[CRN2020] W1014	Star	13.08″	19.58
Cl* Westerlund 1 W 56b	Star	15.38″	18.88
[CRN2020] W1019	Star	17.66″	20.33
Cl* Westerlund 1 W 56	**	18.24″	—
Cl* Westerlund 1 W 56a	BlueSG	18.46″	17.46
Cl* Westerlund 1 W 53	BlueSG	20.55″	18.51
[CRN2020] W1023	Star	27.57″	—
Cl* Westerlund 1 CN I	WolfRayet*	27.88″	—
[CRN2020] W1009	Star	28.06″	19.07
WR 77a	WolfRayet*	30.3″	20.3

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-55 · Registry entry updated 2026-08-14.