UBC 1305

0.39 UTI

0.34

C_N

0.79

C_dens

0.38

C_C3

0.35

C_lit

0.88

C_dup

N₅₀ (P>50% members) 34

Stellar density (N₅₀/rad) 4.0 [N/pc²]

C3 classification CB

C_N 0.34 Poorly populated
C_dens 0.79 Dense
C_C3 0.38 Low quality
C_lit 0.35 Poorly studied
C_dup 0.88 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UBC 1305 is a poorly populated, dense object of low C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 123 along with Collinder_89.

Palma et al. (2025)
Part of multiple system G226, along with Collinder_89, HSC_1502 and OC_0310.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 1305 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–	93.939	22.623	0.517	-0.352	-1.666	–
Zhang et al.	2024	93.939	22.588	–	–	–	–
Hunt & Reffert	2024	93.939	22.588	0.519	-0.358	-1.66	–
Cavallo et al.	2024	93.914	22.611	0.519	–	–	–
Hunt & Reffert	2023	93.939	22.588	0.519	-0.358	-1.66	–
Castro-Ginard et al.	2022	93.92	22.61	0.51	-0.34	-1.66	–

💡 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–	2.105	1.78	1.35	39	-0.169	215	–	–
Liu et al.	2025	5.01	0.87	–	26	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.278⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	215⁽¹⁾	–	–
Cavallo et al.	2024	2.00	2.38	–	52	-0.060	–	–	–
Hunt & Reffert	2023	1.82	1.97	1.35	20	–	–	–	–
Castro-Ginard et al.	2022	2.21	1.59	–	72	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 10843	100.0	93.93	22.62	0.52	-0.36	-1.66	–	0.03
Teutsch 170	11.8	93.85	22.85	0.45	-0.31	-1.61	–	0.07

💡 Note: The % column shows the percentage of members that UBC 1305 shares with each listed object.

Visualization

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