FSR 0377

(MWSC 3641)

0.43 UTI

0.59

C_N

0.23

C_dens

0.75

C_C3

0.29

C_lit

1.0

C_dup

N_m (P>50%) 68

Core radius and density 2.0 [pc], 1.2 [pc^-2]

C3 classification AB

C_N 0.59 Moderately populated
C_dens 0.23 Very loose
C_C3 0.75 High quality
C_lit 0.29 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0377 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~4.54 kpc) differs significantly from the median photometric distance (~2.30 kpc).

Note: This object shares a moderate percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

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

Data

🔍 Search references for FSR 0377 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–	338.726	58.296	0.22	-3.287	-2.168	-63.881
Almeida et al.	2025	338.719	58.304	–	–	–	–
Just et al.	2023	338.649	58.292	–	–	–	–
Dias et al.	2021	338.719	58.304	0.207	-3.219	-2.155	–
Bica et al.	2019	338.71	58.308	–	–	–	–
Sampedro et al.	2017	338.717	58.304	–	-2.55	-5.6	–
Kharchenko et al.	2016	338.649	58.292	–	–	–	–
Dias et al.	2014	338.717	58.304	–	-5.88	-4.04	–
Kharchenko et al.	2013	338.655	58.295	–	-4.58	-1.53	–
Kharchenko et al.	2012	338.655	58.295	–	-4.58	-1.53	–
Froebrich et al.	2007	338.717	58.304	–	–	–	–
Dias et al.	2002	338.717	58.304	–	-5.87	-4.04	–

💡 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–	2.3	1.89	–	50	-0.065	304	–	–
Almeida et al.	2025	3.56	2.16	–	12	–	583	–	–
Just et al.	2023	–	–	–	50	–	26	–	–
Dias et al.	2021	3.56	2.16	–	12	-0.065	–	–	–
Kharchenko et al.	2016	2.30	1.89	–	50	–	–	–	–
Kharchenko et al.	2013	2.30	1.89	–	50	–	–	–	–
Kharchenko et al.	2012	2.30	1.89	–	50	–	–	–	–
Dias et al.	2002	2.30	1.89	–	50	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 390	44.1	338.71	58.29	0.22	-3.38	-2.15	-8.54	0.06
Sh2-138	2.9	338.17	58.51	0.26	-3.27	-2.14	-70.89	0.05

💡 Note: The % column shows the percentage of members that FSR 0377 shares with each listed object.

Visualization

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