UPK 612

(OCSN 319)

0.77 UTI

0.7

C_N

1.0

C_dens

0.75

C_C3

0.7

C_lit

1.0

C_dup

N₅₀ (P>50% members) 90

Stellar density (N₅₀/rad) 5.7 [N/pc²]

C3 classification AB

C_N 0.7 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 612 is a moderately populated, very dense object of 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, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

Very close Low extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P485, along with HSC_2712.

Cavallo et al. (2024)
Gold sample.

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

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for UPK 612 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–	254.275	-68.051	4.359	-13.31	-12.145	3.457
Li et al.	2025	253.423	-67.788	4.323	-13.318	-12.02	–
Almeida et al.	2025	252.983	-67.612	–	–	–	–
Alfonso et al.	2024	254.849	-68.078	4.307	-13.182	-12.239	–
Cavallo et al.	2024	254.22	-67.891	4.387	–	–	–
Hunt & Reffert	2023	255.099	-68.524	4.379	-13.327	-12.208	2.522
Qin et al.	2023	254.62	-68.24	4.29	-13.24	-11.6	3.04
He et al.	2022	254.468	-67.927	4.405	-13.532	-12.359	–
Tarricq et al.	2022	255.279	-68.047	4.364	-13.237	-12.272	–
Dias et al.	2021	252.983	-67.612	4.338	-13.375	-11.967	4.057
Spina et al.	2021	252.913	-67.658	4.266	-13.306	-11.828	–
Cantat-Gaudin et al.	2020	253.423	-67.788	4.323	-13.318	-12.02	–
Cantat-Gaudin & Anders	2020	253.351	-67.815	4.307	-13.402	-12.077	–
Sim et al.	2019	253.346	-68.078	–	-13.27	-12.06	–

💡 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–	0.23	0.23	0.62	101	0.021	211	–	–
Li et al.	2025	0.29	0.23	–	106	0.024	–	–	–
Almeida et al.	2025	0.23	0.26	–	141	–	211	–	–
Alfonso et al.	2024	0.24	0.05	–	60	-0.075	–	–	–
Cavallo et al.	2024	0.23	0.49	–	100	0.270	–	–	–
Hunt & Reffert	2023	0.23	0.10	0.62	120	–	–	–	–
Qin et al.	2023	0.22	0.06	–	200	–	–	–	–
He et al.	2022	–	0.35	–	100	–	–	–	–
Tarricq et al.	2022	0.24	–	–	102	–	–	–	–
Dias et al.	2021	0.23	0.26	–	141	-0.076	–	–	–
Spina et al.	2021	0.23	–	–	100	0.021⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	0.24	0.05	–	100	–	–	–	–
Cantat-Gaudin & Anders	2020	0.23	–	–	–	–	–	–	–
Sim et al.	2019	0.24	–	–	100	–	–	–	–

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

Visualization

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