UBC 660

0.68 UTI

0.55

C_N

1.0

C_dens

0.75

C_C3

0.55

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 59

Radius (P>50% members) 4.4 [arcmin]

C_N 0.55 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.55 Moderately studied
C_dup 1.0 Unique

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

Overview

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UBC 660 is a moderately populated, very dense 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, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 660 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	–	168.47	-59.709	0.483	-6.702	0.684	0.424
Li et al.	2025	168.369	-59.705	0.439	-6.692	0.622	–
Hu & Soubiran	2025	168.483	-59.718	–	–	–	–
Almeida et al.	2025	168.441	-59.715	–	–	–	–
Hunt & Reffert	2024	168.532	-59.711	0.478	-6.712	0.696	0.062
Cavallo et al.	2024	168.483	-59.718	0.479	–	–	–
Hunt & Reffert	2023	168.532	-59.711	0.478	-6.712	0.696	0.062
Dias et al.	2021	168.441	-59.715	0.447	-6.711	0.643	1.309
Cantat-Gaudin et al.	2020	168.369	-59.705	0.439	-6.692	0.622	–
Castro-Ginard et al.	2020	168.397	-59.713	0.437	-6.685	0.623	–

💡 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	1.83	1.26	–	1021	-0.043	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.250*	–	–	–
Almeida et al.	2025	2.23	1.69	–	540	–	267	–	–
Hunt & Reffert	2024	–	–	–	–	–	394*	–	–
Cavallo et al.	2024	2.03	1.41	–	776	0.160	–	–	–
Hunt & Reffert	2023	1.93	1.29	1.71	698	–	–	–	–
Dias et al.	2021	2.23	1.69	–	540	0.222	–	–	–
Cantat-Gaudin et al.	2020	2.08	1.18	–	1000	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 13817	52.5	168.5	-59.71	0.48	-6.7	0.7	0.42	0.04

💡 Note: The % column shows the percentage of members that UBC 660 shares with each listed object.

Visualization

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