DBSB 101

(DBSB2003 101)

0.62 UTI

0.78

C_N

1.0

C_dens

0.75

C_C3

0.29

C_lit

1.0

C_dup

N_m (P>50%) 183

Core radius and density 0.9 [pc], 8.8 [pc^-2]

C3 classification AB

C_N 0.78 Rich
C_dens 1.0 Very dense
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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DBSB 101 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is poorly studied in the literature.

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

Relatively close High extinction Near-solar metallicity Very young

Palma et al. (2025)
Classified as optical pair P382, along with HSC_2760.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1755, e_all=0.136.

Dutra et al. (2003)
Classified as stellar group (IRGr).

Data

🔍 Search references for DBSB 101 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–	242.61	-49.038	0.536	-1.923	-2.152	-22.899
Hunt & Reffert	2024	242.617	-49.04	0.538	-1.979	-2.173	1.419
Celli et al.	2024	242.631	-49.014	–	–	–	–
Cavallo et al.	2024	242.572	-49.054	0.534	–	–	–
Hunt & Reffert	2023	242.617	-49.04	0.538	-1.979	-2.173	1.419
Cantat-Gaudin et al.	2020	242.631	-49.014	0.52	-1.822	-2.193	–
Cantat-Gaudin & Anders	2020	242.631	-49.014	0.52	-1.822	-2.193	–
Cantat-Gaudin et al.	2018	242.631	-49.014	0.52	-1.822	-2.193	–
Dib et al.	2018	242.64	-49.013	–	–	–	–
Joshi et al.	2016	242.64	-49.013	–	–	–	–
Dutra et al.	2003	242.669	-49.098	–	–	–	–

💡 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–	1.79	3.26	2.8	10	0.050	924	–	–
Hunt & Reffert	2024	1.79	3.26	2.80	4	–	1515⁽¹⁾	–	–
Celli et al.	2024	–	–	–	11	–	334	–	–
Cavallo et al.	2024	1.55	3.02	–	7	0.050	–	–	–
Hunt & Reffert	2023	1.79	3.26	2.80	4	–	–	–	–
Cantat-Gaudin et al.	2020	1.87	3.07	–	11	–	–	–	–
Kounkel et al.	2020	1.77	3.64	–	9	–	–	–	–
Cantat-Gaudin & Anders	2020	1.82	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.82	–	–	–	–	–	–	–
Dib et al.	2018	1.08	–	–	112	–	–	–	–
Joshi et al.	2016	1.08	3.35	–	112	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Nor OB5	100.0	242.6	-49.05	0.53	-2.04	-2.15	-23.72	0.25
FSR 1722	98.9	242.6	-49.04	0.53	-2.04	-2.15	-23.72	0.02

💡 Note: The % column shows the percentage of members that DBSB 101 shares with each listed object.

Visualization

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