PHOC 34

0.23 UTI

0.29

C_N

0.21

C_dens

0.38

C_C3

0.12

C_lit

1.0

C_dup

N_m (P>50%) 29

Core radius and density 2.2 [pc], 1.1 [pc^-2]

C3 classification CB

C_N 0.29 Poorly populated
C_dens 0.21 Very loose
C_C3 0.38 Low quality
C_lit 0.12 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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PHOC 34 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P562, along with Theia_1798.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for PHOC 34 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–	85.993	30.079	0.546	1.498	-2.188	–
Hunt & Reffert	2024	85.962	30.091	0.551	1.447	-2.214	–
Cavallo et al.	2024	86.008	30.096	0.548	–	–	–
Hunt & Reffert	2023	85.962	30.091	0.551	1.447	-2.214	–
Hunt & Reffert	2021	86.05	30.07	0.512	1.504	-2.227	–

💡 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–	1.7	1.76	1.71	216	0.200	130	–	–
Hunt & Reffert	2024	1.70	1.76	1.71	216	–	130⁽¹⁾	–	–
Cavallo et al.	2024	1.91	2.08	–	93	0.200	–	–	–
Hunt & Reffert	2023	1.70	1.76	1.71	216	–	–	–	–

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

Visualization

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