W49A

0.12 UTI

0.0

C_N

0.34

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 1.7 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.34 Loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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W49A is a sparse, loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane. No fundamental parameter values are available for this object. It is rarely studied in the literature, with no articles listed in the last 23 years.

Note: This object shares a significant percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

No fundamental parameters

Bica et al. (2003)
Classified as infrared cluster (IRC).

Data

🔍 Search references for W49A in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	287.529	9.079	0.47	-3.037	-5.768	24.454
Bica et al.	2003	287.559	9.106	–	–	–	–

💡 Note: The UCC values are estimated from its identified members.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
BDSB 132	96.0	287.53	9.1	0.47	-3.05	-5.78	24.45	0.07
W49A Welch Ring	84.0	287.53	9.08	0.47	-3.06	-5.77	24.84	0.01
W49A-southwest	60.0	287.52	9.08	0.43	-3.06	-5.64	45.46	0.12

💡 Note: The % column shows the percentage of members that W49A shares with each listed object.

Visualization

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