FoF 204

(LP 0204)

0.27 UTI

0.47

C_N

0.32

C_dens

0.75

C_C3

0.0

C_lit

0.87

C_dup

C3 classification AB

Number of members (P>50%) 47

Radius (P>50% members) 4.5 [arcmin]

C_N 0.47 Poorly populated
C_dens 0.32 Loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.87 Very likely unique

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

Overview

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FoF 204 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, young cluster (see Parameters). It is rarely studied in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

Distant Moderate extinction Massive Near-solar metallicity Young

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

Data

🔍 Search references for FoF 204 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	–	121.436	-31.597	0.241	-2.45	2.848	–
Almeida et al.	2025	121.416	-31.588	–	–	–	–
Dias et al.	2021	121.416	-31.588	0.23	-2.439	2.904	68.358

💡 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	3.48	1.39	–	35	–	1359	–	–
Dias et al.	2021	3.48	1.39	–	35	-0.111	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 2006	74.5	121.46	-31.6	0.25	-2.46	2.83	–	0.08
Ruprecht 155	12.8	121.27	-31.81	0.25	-2.44	2.81	–	0.26

💡 Note: The % column shows the percentage of members that FoF 204 shares with each listed object.

Visualization

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