CWNU 1057

(OCSN 172)

0.46 UTI

0.25

C_N

0.44

C_dens

1.0

C_C3

0.29

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 2.2 [N/pc²]

C3 classification AA

C_N 0.25 Poorly populated
C_dens 0.44 Loose
C_C3 1.0 Very high quality
C_lit 0.29 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1057 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and mass parameters (see Parameters). It is poorly studied in the literature.

Very close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P289, along with HSC_1667.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.98 (50th percentile).

Data

🔍 Search references for CWNU 1057 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–	80.827	-7.882	7.061	-0.912	-2.607	21.271
Wei et al.	2025	81.694	-6.929	2.821	0.766	-0.569	–
Swiggum et al.	2024	80.884	-8.302	7.004	-0.998	-2.67	17.373
Cavallo et al.	2024	81.254	-7.067	6.984	–	–	–
Hunt & Reffert	2023	80.884	-8.302	7.004	-0.998	-2.67	16.418
Qin et al.	2023	80.74	-7.38	6.86	-1.08	-2.68	17.76
He et al.	2022	80.969	-8.12	7.063	-0.944	-2.437	–

💡 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–	0.14	0.19	0.44	28	0.020	226	0.52	–
Wei et al.	2025	0.15	0.12	–	40	0.000	418	0.52	–
Swiggum et al.	2024	0.14	–	–	16	–	35	–	–
Cavallo et al.	2024	0.14	0.83	–	35	0.040	–	–	–
Hunt & Reffert	2023	0.14	0.19	0.44	16	–	–	–	–
Qin et al.	2023	0.15	0.16	–	50	–	–	–	–
He et al.	2022	–	0.25	–	22	–	–	–	–

Visualization

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