FSR 0258

(MWSC 3408)

0.70 UTI

0.64

C_N

1.0

C_dens

0.75

C_C3

0.55

C_lit

1.0

C_dup

N₅₀ (P>50% members) 79

Stellar density (N₅₀/rad) 33.9 [N/pc²]

C3 classification AB

C_N 0.64 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.55 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0258 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by very high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~2.50 kpc) differs significantly from the median photometric distance (~1.24 kpc).

Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.

Relatively close Very high extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G80, along with HSC_659 and HSC_653.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for FSR 0258 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–	311.207	43.897	0.4	-3.312	-3.952	-10.89
Hunt & Reffert	2024	311.206	43.895	0.404	-3.292	-3.948	-67.208
Cavallo et al.	2024	311.216	43.9	0.391	–	–	–
Hunt & Reffert	2023	311.206	43.895	0.404	-3.292	-3.948	-67.208
Just et al.	2023	311.192	43.885	–	–	–	–
Sánchez et al.	2020	311.208	43.915	–	-3.124	-3.641	–
Bica et al.	2019	311.211	43.92	–	–	–	–
Kharchenko et al.	2016	311.192	43.885	–	–	–	–
Kharchenko et al.	2013	311.197	43.888	–	-2.12	-3.36	–
Froebrich et al.	2007	311.208	43.915	–	–	–	–
Dias et al.	2002	311.208	43.915	–	21.47	-23.72	–

💡 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–	1.24	5.16	2.69	200	0.170	414	–	–
Hunt & Reffert	2024	–	–	–	–	–	784⁽¹⁾	–	–
Cavallo et al.	2024	2.57	4.74	–	115	0.170	–	–	–
Hunt & Reffert	2023	2.46	4.80	2.69	56	–	–	–	–
Just et al.	2023	–	–	–	200	–	43	–	–
Kharchenko et al.	2016	1.24	5.16	–	200	–	–	–	–
Kharchenko et al.	2013	1.24	5.16	–	200	–	–	–	–
Dias et al.	2002	1.24	5.16	–	200	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0134	31.6	311.2	43.89	0.38	-3.31	-3.95	–	0.0

💡 Note: The % column shows the percentage of members that FSR 0258 shares with each listed object.

Visualization

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