FSR 0811

(MWSC 826)

0.58 UTI

0.3

C_N

0.43

C_dens

1.0

C_C3

0.58

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.1 [pc], 2.1 [pc^-2]

C3 classification AA

C_N 0.3 Poorly populated
C_dens 0.43 Loose
C_C3 1.0 Very high quality
C_lit 0.58 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 0811 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is moderately studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.3249, e_all=0.0698.

Data

🔍 Search references for FSR 0811 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–	94.122	36.379	0.343	0.903	-2.049	29.879
Hu & Soubiran	2025	94.116	36.386	–	–	–	–
Almeida et al.	2025	94.095	36.38	–	–	–	–
Zhang et al.	2024	94.113	36.364	–	–	–	–
Hunt & Reffert	2024	94.113	36.364	0.34	0.906	-2.033	29.871
Cavallo et al.	2024	94.116	36.386	0.341	–	–	–
Hunt & Reffert	2023	94.113	36.364	0.34	0.906	-2.033	29.871
Almeida et al.	2023	94.097	36.378	–	–	–	–
Just et al.	2023	94.093	36.367	–	–	–	–
Jadhav & Subramaniam	2021	94.105	36.377	–	–	–	–
Dias et al.	2021	94.095	36.38	0.339	0.958	-2.096	–
Cantat-Gaudin et al.	2020	94.105	36.377	0.325	0.948	-2.064	–
Zhong et al.	2020	94.105	36.377	–	0.948	-2.064	-6.142
Cantat-Gaudin & Anders	2020	94.105	36.377	0.325	0.948	-2.064	–
Bica et al.	2019	94.081	36.356	–	–	–	–
Cantat-Gaudin et al.	2018	94.105	36.377	0.325	0.948	-2.064	–
Kharchenko et al.	2016	94.093	36.367	–	–	–	–
Kharchenko et al.	2013	94.102	36.365	–	-3.02	1.6	–
Kharchenko et al.	2012	94.102	36.365	–	-3.02	1.6	–
Froebrich et al.	2007	94.083	36.355	–	–	–	–

💡 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–	2.82	0.915	0.665	631	-0.164	266	0.57	0
Hu & Soubiran	2025	–	–	–	–	-0.220⁽⁵⁾	–	–	–
Almeida et al.	2025	2.35	1.00	–	590	–	262	–	–
Zhang et al.	2024	–	–	–	–	-0.232⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.56	0.57	0.66	462	–	266⁽¹⁾	–	–
Cavallo et al.	2024	2.49	0.93	–	871	-0.140	–	–	–
Hunt & Reffert	2023	2.56	0.57	0.67	462	–	–	–	–
Almeida et al.	2023	2.47	0.90	–	776	-0.131	239⁽¹⁾	0.57	–
Just et al.	2023	–	–	–	631	–	968	–	–
Jadhav & Subramaniam	2021	3.09	0.88	–	407	–	357	–	0⁽¹⁾
Dias et al.	2021	2.35	1.00	–	590	-0.100	–	–	–
Cantat-Gaudin et al.	2020	3.09	0.88	–	407	–	–	–	–
Kounkel et al.	2020	2.83	0.84	–	891	–	–	–	–
Zhong et al.	2020	2.82⁽¹⁾	–	–	–	-0.187	–	–	–
Cantat-Gaudin & Anders	2020	2.82	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.82	–	–	–	–	–	–	–
Kharchenko et al.	2016	5.44	1.18	–	631	–	–	–	–
Kharchenko et al.	2013	5.44	1.18	–	631	–	–	–	–
Kharchenko et al.	2012	5.44	1.18	–	631	–	–	–	–

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

Visualization

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