DB2001 20

(MWSC 3385)

0.17 UTI

0.0

C_N

0.04

C_dens

0.62

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 4.5 [pc], 0.2 [pc^-2]

C3 classification AC

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.1 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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DB2001 20 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate^* distance, above the mid-plane, affected by high extinction. It is catalogued as a low-mass, young cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~3.60 kpc) differs significantly from the median photometric distance (~1.82 kpc).

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close High extinction Low mass Young

Bica et al. (2003)
Classified as infrared cluster (IRC).

Dutra & Bica (2001)
Mostly a resolved cluster in radio hii region w75n, pair with w75n ir cluster

Data

🔍 Search references for DB2001 20 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–	309.711	42.797	0.278	-3.466	-4.96	–
Just et al.	2023	309.649	42.654	–	–	–	–
Kharchenko et al.	2016	309.649	42.654	–	–	–	–
Kharchenko et al.	2013	309.654	42.657	–	0.78	-0.7	–
Bica et al.	2003	309.737	42.74	–	–	–	–
Dutra & Bica	2001	309.737	42.74	–	–	–	–

💡 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–	1.82	3.94	–	32	–	43	–	–
Just et al.	2023	–	–	–	32	–	43	–	–
Kharchenko et al.	2016	1.82	3.94	–	32	–	–	–	–
Kharchenko et al.	2013	1.82	3.94	–	32	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
W75N	64.0	309.72	42.76	0.23	-3.49	-4.86	–	0.05

💡 Note: The % column shows the percentage of members that DB2001 20 shares with each listed object.

Visualization

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