UBC 1303

0.59 UTI

0.62

C_N

1.0

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 73

Stellar density (N₅₀/rad) 10.9 [N/pc²]

C3 classification AB

C_N 0.62 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.3 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 1303 is a moderately populated, very dense object of high 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, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a significant percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G118, along with HSC_1504, NGC_2175, Pismis_27 and FSR_0902.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 1303 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–	92.009	21.918	0.506	0.925	-3.57	11.106
Zhang et al.	2024	91.993	21.915	–	–	–	–
Hunt & Reffert	2024	91.993	21.915	0.504	0.89	-3.511	3.915
Cavallo et al.	2024	91.997	21.926	0.505	–	–	–
Hunt & Reffert	2023	91.993	21.915	0.504	0.89	-3.511	3.915
Castro-Ginard et al.	2022	91.98	21.93	0.51	0.94	-3.6	11.38

💡 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–	1.91	1.28	1.19	301	0.201	307	–	–
Zhang et al.	2024	–	–	–	–	-0.138⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	307⁽¹⁾	–	–
Cavallo et al.	2024	1.91	1.30	–	331	0.540	–	–	–
Hunt & Reffert	2023	1.81	1.28	1.19	244	–	–	–	–
Castro-Ginard et al.	2022	2.02	1.00	–	301	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 436	50.7	91.99	21.93	0.51	0.93	-3.58	15.66	0.0
CWWDL 8616	49.3	92.0	21.92	0.52	0.96	-3.57	15.66	0.0

💡 Note: The % column shows the percentage of members that UBC 1303 shares with each listed object.

Visualization

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