FSR 0494

(SAI 5; MWSC 42)

0.81 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

0.77

C_lit

1.0

C_dup

N_m (P>50%) 125

Core radius and density 1.4 [pc], 5.7 [pc^-2]

C3 classification AB

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.77 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 0494 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age 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 contains blue stragglers according to at least one source.

Note: This object shares a moderate percentage of members with 2 later reported entries. See table with shared members information.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1566, e_all=0.0829.

Data

🔍 Search references for FSR 0494 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–	6.408	63.757	0.222	-2.5	-0.917	-65.747
Otto et al.	2026	6.396	63.756	–	-2.5	-0.84	-64.0
Guerco et al.	2025	6.43	63.8	0.21	-2.49	-0.93	-64.7
Hu & Soubiran	2025	6.419	63.752	–	–	–	–
Almeida et al.	2025	6.431	63.751	–	–	–	–
Hunt & Reffert	2024	6.396	63.756	0.223	-2.509	-0.906	-65.266
Cavallo et al.	2024	6.419	63.752	0.224	–	–	–
Hunt & Reffert	2023	6.396	63.756	0.223	-2.509	-0.906	-65.266
Just et al.	2023	6.411	63.747	–	–	–	–
Jadhav & Subramaniam	2021	6.416	63.754	–	–	–	–
Netopil et al.	2022	6.416	63.754	–	–	–	-63.1
Dias et al.	2021	6.431	63.751	0.196	-2.512	-0.832	–
Spina et al.	2021	6.409	63.756	0.212	-2.518	-0.823	–
Cantat-Gaudin et al.	2020	6.416	63.754	0.225	-2.503	-0.844	–
Donor et al.	2020	6.42	63.75	–	-2.52	-0.86	-64.0
Cantat-Gaudin & Anders	2020	6.416	63.754	0.225	-2.503	-0.844	–
Cantat-Gaudin et al.	2019	6.416	63.754	0.23	-2.5	-0.85	–
Sampedro et al.	2017	6.383	63.758	–	-2.55	0.57	–
Kharchenko et al.	2016	6.411	63.747	–	–	–	–
Dias et al.	2014	6.383	63.758	–	-1.76	-0.68	–
Kharchenko et al.	2013	6.42	63.75	–	-2.97	-2.66	–
Kharchenko et al.	2012	6.42	63.75	–	-2.87	-2.72	–
Glushkova et al.	2010	6.407	63.761	–	–	–	–
Froebrich et al.	2007	6.383	63.758	–	–	–	–
Dias et al.	2002	6.383	63.758	–	-2.87	-2.72	–

💡 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–	4.06	2.2	2.08	891	-0.020	1136	–	4
Otto et al.	2026	–	–	–	891	-0.030⁽¹⁵⁾	–	–	–
Guerco et al.	2025	–	–	–	890	-0.030	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.150⁽⁵⁾	–	–	–
Almeida et al.	2025	3.47	2.83	–	741	–	665	–	–
Hunt & Reffert	2024	4.06	2.94	2.08	278	–	1589⁽¹⁾	–	–
Cavallo et al.	2024	3.55	2.82	–	661	0.290	–	–	–
Hunt & Reffert	2023	4.06	2.94	2.08	279	–	–	–	–
Just et al.	2023	–	–	–	1995	–	2104	–	–
Spina et al.	2022	–	–	–	–	-0.010	–	–	–
Jadhav & Subramaniam	2021	4.07	2.20	–	891	–	684	–	4⁽¹⁾
Netopil et al.	2022	4.07⁽¹⁾	–	–	891	-0.010⁽¹⁾	–	–	–
Dias et al.	2021	3.47	2.83	–	741	-0.065	–	–	–
Spina et al.	2021	4.45	–	–	891	–	–	–	–
Cantat-Gaudin et al.	2020	4.07	2.20	–	891	–	–	–	–
Kounkel et al.	2020	3.33	2.38	–	631	–	–	–	–
Donor et al.	2020	–	–	–	–	-0.010	–	–	–
Cantat-Gaudin & Anders	2020	3.94	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2019	3.94	–	–	–	–	–	–	–
Kharchenko et al.	2016	5.09	1.64	–	1995	–	–	–	–
Kharchenko et al.	2013	5.09	1.64	–	1995	–	–	–	–
Kharchenko et al.	2012	5.09	1.64	–	1995	–	–	–	–
Glushkova et al.	2010	3.50	1.89	–	1259	–	–	–	–
Dias et al.	2002	5.09	1.64	–	1995	–	–	–	–

(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 0226	25.6	6.4	63.76	0.2	-2.48	-0.92	-65.93	0.0
CWWDL 10464	2.4	6.41	63.53	0.26	-2.67	-0.55	-77.31	0.07

💡 Note: The % column shows the percentage of members that FSR 0494 shares with each listed object.

Visualization

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