UBC 617

0.31 UTI

0.3

C_N

0.18

C_dens

0.5

C_C3

0.29

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.9 [pc], 0.9 [pc^-2]

C3 classification BB

C_N 0.3 Poorly populated
C_dens 0.18 Very loose
C_C3 0.5 Intermediate 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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UBC 617 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.73 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.73 (50th percentile).

Data

🔍 Search references for UBC 617 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–	94.774	10.111	0.427	-1.395	-0.176	64.707
Hu & Soubiran	2025	94.804	10.089	–	–	–	–
Almeida et al.	2025	94.748	10.127	–	–	–	–
Zhang et al.	2024	94.772	10.122	–	–	–	–
Hunt & Reffert	2024	94.772	10.122	0.423	-1.395	-0.165	68.094
Cavallo et al.	2024	94.804	10.089	0.424	–	–	–
Hunt & Reffert	2023	94.772	10.122	0.423	-1.395	-0.165	68.094
Jadhav & Subramaniam	2021	94.739	10.121	–	–	–	–
Dias et al.	2021	94.748	10.127	0.413	-1.39	-0.172	61.138
Cantat-Gaudin et al.	2020	94.739	10.121	0.445	-1.377	-0.2	–
Castro-Ginard et al.	2020	94.732	10.127	0.446	-1.362	-0.192	–

💡 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–	2.27	1.04	0.87	1248	0.015	186	–	0
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Almeida et al.	2025	2.26	1.74	–	1045	–	186	–	–
Zhang et al.	2024	–	–	–	–	0.138⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.21	0.84	0.87	1375	–	204⁽¹⁾	–	–
Cavallo et al.	2024	2.28	1.24	–	1122	0.250	–	–	–
Hunt & Reffert	2023	2.21	0.84	0.87	1374	–	–	–	–
Jadhav & Subramaniam	2021	2.39	0.60	–	1995	–	105	–	0⁽¹⁾
Dias et al.	2021	2.26	1.74	–	1045	-0.108	–	–	–
Cantat-Gaudin et al.	2020	2.39	0.60	–	1995	–	–	–	–
Kounkel et al.	2020	2.46	2.63	–	525	–	–	–	–

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

Visualization

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