UBC 277

0.44 UTI

0.76

C_N

0.35

C_dens

0.75

C_C3

0.16

C_lit

1.0

C_dup

N_m (P>50%) 124

Core radius and density 3.1 [pc], 1.7 [pc^-2]

C3 classification AB

C_N 0.76 Rich
C_dens 0.35 Loose
C_C3 0.75 High quality
C_lit 0.16 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

UBC 277 is a rich, loose 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 rarely studied in the literature.

Note: This object shares a large 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)
Classified as optical pair P362, along with CWNU_2712.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UBC 277 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	174.036	-59.468	0.528	-6.495	1.652	-16.12
Li et al.	2025	174.042	-59.46	0.53	-6.503	1.618	–
Hunt & Reffert	2024	173.99	-59.49	0.523	-6.494	1.649	-13.711
Cavallo et al.	2024	174.063	-59.472	0.523	–	–	–
Hunt & Reffert	2023	173.99	-59.49	0.523	-6.494	1.649	-13.711
Cantat-Gaudin et al.	2020	174.042	-59.46	0.53	-6.503	1.618	–
Castro-Ginard et al.	2020	174.036	-59.465	0.528	-6.496	1.617	–

💡 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–	1.79	1.03	0.67	102	0.199	727	–	–
Li et al.	2025	1.64	1.01	–	90	0.037	–	–	–
Hunt & Reffert	2024	1.79	0.91	0.67	102	–	727⁽¹⁾	–	–
Cavallo et al.	2024	1.96	1.11	–	148	0.360	–	–	–
Hunt & Reffert	2023	1.79	0.91	0.67	102	–	–	–	–
Cantat-Gaudin et al.	2020	1.84	1.05	–	102	–	–	–	–
Kounkel et al.	2020	1.65	1.38	–	69	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
LISC 3241	100.0	174.03	-59.47	0.52	-6.5	1.66	-14.08	0.14
CWWDL 13971	57.3	174.04	-59.49	0.52	-6.48	1.66	-16.12	0.0

💡 Note: The % column shows the percentage of members that UBC 277 shares with each listed object.

Visualization

ℹ️

1 2 3