FSR 0238

(MWSC 3373)

0.88 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.81

C_lit

1.0

C_dup

N₅₀ (P>50% members) 124

Stellar density (N₅₀/rad) 6.6 [N/pc²]

C3 classification AA

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.81 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0238 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is well-studied in the literature.

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

Relatively close High extinction Near-solar metallicity Very young

Palma et al. (2025)
Classified as optical pair P116, along with HSC_630.

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for FSR 0238 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–	308.633	41.393	0.591	-2.837	-4.528	-27.328
Zhang et al.	2024	308.71	41.476	–	–	–	–
Hunt & Reffert	2024	308.71	41.476	0.736	0.198	-3.206	-45.925
Cavallo et al.	2024	308.451	41.511	0.736	–	–	–
Hunt & Reffert	2023	308.71	41.476	0.736	0.198	-3.206	-45.925
Just et al.	2023	308.68	41.412	–	–	–	–
Cantat-Gaudin et al.	2020	308.693	41.417	0.596	-2.902	-4.547	–
Zhong et al.	2020	308.693	41.417	–	-2.902	-4.547	26.586
Cantat-Gaudin & Anders	2020	308.693	41.417	0.596	-2.902	-4.547	–
Bica et al.	2019	308.695	41.42	–	–	–	–
Cantat-Gaudin et al.	2018	308.693	41.417	0.596	-2.902	-4.547	–
Kharchenko et al.	2016	308.68	41.412	–	–	–	–
Dias et al.	2014	308.696	41.416	–	1.31	-1.6	–
Kharchenko et al.	2013	308.685	41.415	–	-1.03	-3.55	–
Froebrich et al.	2007	308.696	41.416	–	–	–	–
Dias et al.	2002	308.696	41.416	–	-1.03	-3.55	–

💡 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–	1.6	4.7	2.49	6	0.000	384	–	–
Zhang et al.	2024	–	–	–	–	-0.163⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	196⁽¹⁾	–	–
Cavallo et al.	2024	1.65	2.33	–	16	0.820	–	–	–
Hunt & Reffert	2023	1.31	2.73	2.49	8	–	–	–	–
Just et al.	2023	–	–	–	6	–	571	–	–
Tarricq et al.	2022	1.45	–	–	63	–	–	–	–
Cantat-Gaudin et al.	2020	1.53	4.70	–	74	–	–	–	–
Zhong et al.	2020	0.00	0.00	–	0	0.000	–	–	–
Cantat-Gaudin & Anders	2020	1.60	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.60	–	–	–	–	–	–	–
Kharchenko et al.	2016	3.09	5.29	–	6	–	–	–	–
Kharchenko et al.	2013	3.09	5.29	–	6	–	–	–	–
Dias et al.	2002	3.09	5.29	–	6	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Cyg OB2	35.5	308.31	41.3	0.58	-2.72	-4.41	-8.19	0.17
Bica 2	27.4	308.31	41.3	0.58	-2.68	-4.41	-13.56	0.82
G 80.35+0.72	4.8	308.43	41.38	0.54	-2.83	-4.13	-4.79	0.16

💡 Note: The % column shows the percentage of members that FSR 0238 shares with each listed object.

Visualization

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