FSR 0977

(MWSC 895; Riddle 1; Teutsch J0631.9+1151)

0.90 UTI

0.77

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 149

Stellar density (N₅₀/rad) 14.1 [N/pc²]

C3 classification AB

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very 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 0977 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for FSR 0977 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–	97.977	11.873	0.439	0.704	-1.542	24.799
Li et al.	2025	97.974	11.865	0.453	0.721	-1.533	–
Hu & Soubiran	2025	97.985	11.859	–	–	–	–
Almeida et al.	2025	97.975	11.857	–	–	–	–
Zhang et al.	2024	97.968	11.868	–	–	–	–
Hunt & Reffert	2024	97.968	11.868	0.448	0.684	-1.546	23.756
Cavallo et al.	2024	97.985	11.859	0.446	–	–	–
Hunt & Reffert	2023	97.968	11.868	0.448	0.684	-1.546	23.756
Almeida et al.	2023	97.974	11.861	–	–	–	–
Just et al.	2023	97.957	11.847	–	–	–	–
Dias et al.	2021	97.975	11.857	0.44	0.7	-1.528	23.464
Cantat-Gaudin et al.	2020	97.974	11.865	0.453	0.721	-1.533	–
Cantat-Gaudin & Anders	2020	97.974	11.865	0.453	0.721	-1.533	–
Soubiran et al.	2018	97.974	11.865	–	–	–	23.72
Bica et al.	2019	97.972	11.844	–	–	–	–
Cantat-Gaudin et al.	2018	97.974	11.865	0.453	0.721	-1.533	–
Kharchenko et al.	2016	97.957	11.847	–	–	–	–
Dias et al.	2014	97.963	11.844	–	-1.11	2.18	–
Kharchenko et al.	2013	97.965	11.845	–	3.15	0.25	–
Froebrich et al.	2007	97.963	11.844	–	–	–	–
Dias et al.	2002	97.963	11.844	–	3.15	0.25	–

💡 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–	1.92	1.595	2.38	661	-0.149	148	0.81	–
Li et al.	2025	1.77	1.37	–	952	-0.176	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.140⁽⁵⁾	–	–	–
Almeida et al.	2025	1.78	1.50	–	920	–	91	–	–
Zhang et al.	2024	–	–	–	–	-0.189⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	382⁽¹⁾	–	–
Cavallo et al.	2024	2.14	1.69	–	661	0.120	–	–	–
Hunt & Reffert	2023	2.00	1.60	2.38	618	–	–	–	–
Almeida et al.	2023	1.78	1.59	–	851	-0.147	200⁽¹⁾	0.81	–
Just et al.	2023	–	–	–	479	–	96	–	–
Dias et al.	2021	1.78	1.50	–	920	-0.151	–	–	–
Cantat-Gaudin et al.	2020	2.19	1.00	–	851	–	–	–	–
Cantat-Gaudin & Anders	2020	2.07	–	–	–	–	–	–	–
Soubiran et al.	2018	2.07	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.07	–	–	–	–	–	–	–
Kharchenko et al.	2016	1.92	1.81	–	479	–	–	–	–
Kharchenko et al.	2013	1.92	1.81	–	479	–	–	–	–
Dias et al.	2002	1.92	1.81	–	479	–	–	–	–

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

Visualization

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