Feibelman 1

(MWSC 3301)

0.85 UTI

0.6

C_N

1.0

C_dens

1.0

C_C3

0.82

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 70

Radius (P>50% members) 2.7 [arcmin]

C_N 0.6 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.82 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Feibelman 1 is a moderately populated, very dense object of very 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 age, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

Distant Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Feibelman 1 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	–	304.427	38.03	0.258	-3.2	-4.99	–
Li et al.	2025	304.417	38.03	0.26	-3.192	-4.956	–
Almeida et al.	2025	304.428	38.029	–	–	–	–
Hunt & Reffert	2024	304.421	38.03	0.253	-3.192	-4.991	–
Cavallo et al.	2024	304.424	38.023	0.254	–	–	–
Hunt & Reffert	2023	304.421	38.03	0.253	-3.192	-4.991	–
Just et al.	2023	304.441	38.03	–	–	–	–
Dias et al.	2021	304.428	38.029	0.249	-3.212	-4.953	–
Cantat-Gaudin et al.	2020	304.417	38.03	0.26	-3.192	-4.956	–
Cantat-Gaudin & Anders	2020	304.417	38.03	0.26	-3.192	-4.956	–
Cantat-Gaudin et al.	2018	304.417	38.03	0.26	-3.192	-4.956	–
Loktin & Popova	2017	304.44	38.033	–	-0.504	-0.464	-8.9
Kharchenko et al.	2016	304.441	38.03	–	–	–	–
Dias et al.	2014	304.446	38.033	–	-2.35	-2.24	-8.9
Kharchenko et al.	2013	304.446	38.033	–	-1.52	-0.96	-8.9
Dias et al.	2002	304.446	38.033	–	-2.35	-2.24	-8.9

💡 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]	Bfr	BSS
Li et al.	2025	3.04	1.98	–	424	0.035	–	–	–
Almeida et al.	2025	3.23	2.10	–	149	–	288	–	–
Hunt & Reffert	2024	–	–	–	–	–	848*	–	–
Cavallo et al.	2024	3.33	2.28	–	129	0.550	–	–	–
Hunt & Reffert	2023	3.43	2.46	1.90	17	–	–	–	–
Just et al.	2023	–	–	–	5	–	26	–	–
Dias et al.	2021	3.23	2.10	–	149	0.140	–	–	–
Cantat-Gaudin et al.	2020	3.94	1.93	–	138	–	–	–	–
Cantat-Gaudin & Anders	2020	3.46	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.46	–	–	–	–	–	–	–
Loktin & Popova	2017	2.37	0.64	–	871	–	–	–	–
Kharchenko et al.	2016	1.46	6.58	–	5	–	–	–	–
Kharchenko et al.	2013	1.46	6.58	–	5	–	–	–	–
Dias et al.	2002	1.46	6.58	–	5	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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