UBC 648

0.67 UTI

0.6

C_N

0.9

C_dens

0.75

C_C3

0.55

C_lit

1.0

C_dup

C3 classification BA

Number of members (P>50%) 69

Radius (P>50% members) 2.5 [arcmin]

C_N 0.6 Moderately populated
C_dens 0.9 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 648 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a large distance, well above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Distant Low extinction Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 648 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	–	142.558	-34.137	0.186	-4.263	1.79	7.996
Li et al.	2025	142.543	-34.136	0.172	-4.289	1.811	–
Hu & Soubiran	2025	142.562	-34.142	–	–	–	–
Almeida et al.	2025	142.543	-34.144	–	–	–	–
Hunt & Reffert	2024	142.555	-34.142	0.198	-4.241	1.798	7.82
Cavallo et al.	2024	142.563	-34.142	0.193	–	–	–
Hunt & Reffert	2023	142.555	-34.142	0.198	-4.241	1.798	7.82
Dias et al.	2021	142.543	-34.144	0.186	-4.258	1.799	–
Cantat-Gaudin et al.	2020	142.543	-34.136	0.172	-4.289	1.811	–
Castro-Ginard et al.	2020	142.53	-34.142	0.168	-4.265	1.796	–

💡 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	4.16	0.26	–	6515	-0.146	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.260*	–	–	–
Almeida et al.	2025	4.82	0.60	–	3622	–	602	–	–
Hunt & Reffert	2024	–	–	–	–	–	276*	–	–
Cavallo et al.	2024	2.87	0.67	–	8128	-0.720	–	–	–
Hunt & Reffert	2023	4.22	0.24	1.11	2037	–	–	–	–
Dias et al.	2021	4.82	0.60	–	3622	-0.280	–	–	–
Cantat-Gaudin et al.	2020	5.08	0.46	–	2239	–	–	–	–

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

Visualization

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