FSR 0227

(MWSC 3349)

0.26 UTI

0.29

C_N

0.11

C_dens

0.38

C_C3

0.29

C_lit

0.97

C_dup

N_m (P>50%) 29

Core radius and density 2.0 [pc], 0.6 [pc^-2]

C3 classification CB

C_N 0.29 Poorly populated
C_dens 0.11 Very loose
C_C3 0.38 Low quality
C_lit 0.29 Poorly studied
C_dup 0.97 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0227 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.

Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close High extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G71, along with Dolidze_11 and OC_0124.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.26 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.26 (50th percentile).

Data

🔍 Search references for FSR 0227 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–	307.261	40.478	0.627	-1.923	-4.379	–
Hunt & Reffert	2024	307.25	40.486	0.497	-1.838	-4.584	–
Cavallo et al.	2024	307.213	40.505	0.499	–	–	–
Hunt & Reffert	2023	307.25	40.486	0.497	-1.838	-4.584	–
Just et al.	2023	307.24	40.494	–	–	–	–
He et al.	2022	306.769	40.048	1.047	-2.076	-4.043	–
Bica et al.	2019	307.243	40.501	–	–	–	–
Dib et al.	2018	307.245	40.497	–	–	–	–
Joshi et al.	2016	307.245	40.497	–	–	–	–
Kharchenko et al.	2016	307.24	40.494	–	–	–	–
Kharchenko et al.	2013	307.245	40.497	–	-1.44	-4.93	–
Froebrich et al.	2007	307.242	40.501	–	–	–	–

💡 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–	1.3	3.28	2.335	327	0.480	246	–	–
Hunt & Reffert	2024	1.94	3.60	2.34	4	–	478⁽¹⁾	–	–
Cavallo et al.	2024	1.97	3.44	–	6	0.480	–	–	–
Hunt & Reffert	2023	1.94	3.60	2.33	4	–	–	–	–
Just et al.	2023	–	–	–	327	–	13	–	–
He et al.	2022	–	1.55	–	2	–	–	–	–
Dib et al.	2018	1.30	–	–	327	–	–	–	–
Joshi et al.	2016	1.30	3.28	–	327	–	–	–	–
Kharchenko et al.	2016	1.30	3.28	–	327	–	–	–	–
Kharchenko et al.	2013	1.30	3.28	–	327	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Bica 136	51.7	307.26	40.49	0.51	-1.84	-4.54	–	0.39
DB2001 11	3.4	307.06	40.87	0.51	-2.03	-4.28	–	0.08
IRAS 20264+4042	3.4	307.06	40.82	0.51	-2.02	-4.36	–	0.09

💡 Note: The % column shows the percentage of members that FSR 0227 shares with each listed object.

Visualization

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