FoF 1957

(LP 1957)

0.13 UTI

0.32

C_N

0.08

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 32

Radius (P>50% members) 8.6 [arcmin]

C_N 0.32 Poorly populated
C_dens 0.08 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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FoF 1957 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. 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.

Distant Moderate extinction Near-solar metallicity Very young

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.

Data

🔍 Search references for FoF 1957 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	–	41.504	59.74	0.284	-0.507	-0.197	-58.279
Almeida et al.	2025	41.521	59.771	–	–	–	–
Dias et al.	2021	41.521	59.771	0.28	-0.523	-0.168	-57.522

💡 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]	Bfr	BSS
Almeida et al.	2025	3.29	2.72	–	9	–	779	–	–
Dias et al.	2021	3.29	2.72	–	9	-0.093	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 10687	25.0	41.86	59.84	0.29	-0.53	-0.11	-55.01	0.04

💡 Note: The % column shows the percentage of members that FoF 1957 shares with each listed object.

Visualization

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