UBC 270

0.68 UTI

0.56

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%) 61

Radius (P>50% members) 2.7 [arcmin]

C_N 0.56 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 270 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 270 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	–	169.821	-59.561	0.4	-6.348	1.153	–
Li et al.	2025	169.813	-59.552	0.389	-6.333	1.122	–
Almeida et al.	2025	169.787	-59.548	–	–	–	–
Hunt & Reffert	2024	169.828	-59.569	0.404	-6.334	1.171	–
Cavallo et al.	2024	169.802	-59.561	0.404	–	–	–
Hunt & Reffert	2023	169.828	-59.569	0.404	-6.334	1.171	–
Almeida et al.	2023	169.805	-59.553	–	–	–	–
Dias et al.	2021	169.787	-59.548	0.395	-6.365	1.133	–
Cantat-Gaudin et al.	2020	169.813	-59.552	0.389	-6.333	1.122	–
Castro-Ginard et al.	2020	169.789	-59.544	0.394	-6.35	1.13	–

💡 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	2.36	0.98	–	153	0.068	–	–	–
Almeida et al.	2025	2.41	1.25	–	13	–	213	–	–
Hunt & Reffert	2024	–	–	–	–	–	425*	–	–
Cavallo et al.	2024	2.31	1.10	–	38	0.120	–	–	–
Hunt & Reffert	2023	2.24	0.92	1.32	33	–	–	–	–
Almeida et al.	2023	2.23	1.21	–	81	0.076	758*	0.61	–
Dias et al.	2021	2.41	1.25	–	13	0.048	–	–	–
Cantat-Gaudin et al.	2020	2.55	0.67	–	162	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 2211	78.7	169.83	-59.56	0.41	-6.35	1.15	–	0.01

💡 Note: The % column shows the percentage of members that UBC 270 shares with each listed object.

Visualization

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