W49A Welch Ring

(BDB2003 G043.17+00.01)

0.15 UTI

0.0

C_N

0.48

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 24

Stellar density (N₅₀/rad) 2.4 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.48 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 Welch Ring is a sparse, loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane. It is catalogued as a cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 13 years.

(*): The parallax distance estimate (~2.13 kpc) differs significantly from the median photometric distance (~11.40 kpc).

Note: This object shares a large 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.

Extremely distant

Morales et al. (2013)
Classified as morphological type 'EC1' (deeply embedded cluster). Morphological flag: cluster fully embedded.

Data

🔍 Search references for W49A Welch Ring 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	9.084	0.47	-3.063	-5.768	24.837
Morales et al.	2013	287.558	9.105	–	–	–	–

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

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	11.4	–	–	–	–	–	–	–
Morales et al.	2013	11.40	–	–	–	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
BDSB 132	92.0	287.53	9.1	0.47	-3.05	-5.78	24.45	0.2

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

Visualization

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