FSR 1211

(MWSC 1312)

0.63 UTI

0.77

C_N

0.61

C_dens

0.75

C_C3

0.52

C_lit

1.0

C_dup

N_m (P>50%) 155

Core radius and density 2.3 [pc], 3.0 [pc^-2]

C3 classification AB

C_N 0.77 Rich
C_dens 0.61 Moderately dense
C_C3 0.75 High quality
C_lit 0.52 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 1211 is a rich, moderately dense object of 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, old cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is moderately studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Distant Low extinction Near-solar metallicity Old 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: 0.99 (50th percentile).

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

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1042, e_all=0.3003.

Data

🔍 Search references for FSR 1211 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–	115.334	-9.612	0.279	-3.137	2.584	84.176
Li et al.	2025	115.336	-9.607	0.288	-3.137	2.564	–
Hu & Soubiran	2025	115.328	-9.61	–	–	–	–
Almeida et al.	2025	115.338	-9.604	–	–	–	–
Hunt & Reffert	2024	115.338	-9.617	0.284	-3.151	2.574	83.063
Cavallo et al.	2024	115.328	-9.61	0.275	–	–	–
Hunt & Reffert	2023	115.338	-9.617	0.284	-3.151	2.574	83.063
Almeida et al.	2023	115.338	-9.607	–	–	–	–
Just et al.	2023	115.374	-9.608	–	–	–	–
Jadhav & Subramaniam	2021	115.336	-9.607	–	–	–	–
Dias et al.	2021	115.338	-9.604	0.291	-3.122	2.556	–
Cantat-Gaudin et al.	2020	115.336	-9.607	0.288	-3.137	2.564	–
Cantat-Gaudin & Anders	2020	115.336	-9.607	0.288	-3.137	2.564	–
Bossini et al.	2019	115.336	-9.607	–	–	–	–
Cantat-Gaudin et al.	2018	115.336	-9.607	0.288	-3.137	2.564	–
Kharchenko et al.	2016	115.374	-9.608	–	–	–	–
Kharchenko et al.	2013	115.38	-9.61	–	2.24	-1.23	–
Froebrich et al.	2007	115.362	-9.615	–	–	–	–

💡 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–	3.18	0.19	0.58	1334	-0.158	493	0.78	1
Li et al.	2025	3.28	0.53	–	1226	-0.223	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.270⁽⁵⁾	–	–	–
Almeida et al.	2025	3.18	0.46	–	1334	–	259	–	–
Hunt & Reffert	2024	3.06	0.14	0.58	1342	–	574⁽¹⁾	–	–
Cavallo et al.	2024	2.63	0.26	–	1660	-0.130	–	–	–
Hunt & Reffert	2023	3.06	0.14	0.58	1343	–	–	–	–
Almeida et al.	2023	3.07	0.03	–	1274	0.027	381⁽¹⁾	0.78	–
Just et al.	2023	–	–	–	1365	–	802	–	–
Jadhav & Subramaniam	2021	3.31	0.19	–	1202	–	493	–	1⁽¹⁾
Dias et al.	2021	3.18	0.46	–	1334	-0.185	–	–	–
Cantat-Gaudin et al.	2020	3.31	0.19	–	1202	–	–	–	–
Kounkel et al.	2020	3.39	0.56	–	1000	–	–	–	–
Cantat-Gaudin & Anders	2020	3.15	–	–	–	–	–	–	–
Bossini et al.	2019	3.18	0.29	–	1067	0.000	–	–	–
Cantat-Gaudin et al.	2018	3.15	–	–	–	–	–	–	–
Kharchenko et al.	2016	4.33	0.16	–	1365	–	–	–	–
Kharchenko et al.	2013	4.33	0.16	–	1365	–	–	–	–

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

Visualization

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