PHOC 31

0.61 UTI

0.56

C_N

1.0

C_dens

0.75

C_C3

0.38

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 63

Radius (P>50% members) 6.4 [arcmin]

C_N 0.56 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.38 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

PHOC 31 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively 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 absorption, age, and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for PHOC 31 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	168.742	-59.405	0.935	-6.85	2.382	-15.874
Wei et al.	2025	168.76	-59.418	0.941	-6.855	2.372	–
Hunt & Reffert	2024	168.735	-59.43	0.921	-6.872	2.374	-16.114
Cavallo et al.	2024	168.702	-59.394	0.932	–	–	–
Hunt & Reffert	2023	168.735	-59.43	0.921	-6.872	2.374	-16.114
He et al.	2022	168.735	-59.427	0.933	-6.847	2.365	–
Hunt & Reffert	2021	168.752	-59.39	0.914	-6.839	2.321	–

💡 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]	Bfr	BSS
Wei et al.	2025	1.12	0.48	–	661	-0.250	135	0.22	–
Hunt & Reffert	2024	–	–	–	–	–	213*	–	–
Cavallo et al.	2024	1.05	0.00	–	417	0.240	–	–	–
Hunt & Reffert	2023	1.03	0.16	0.65	188	–	–	–	–
He et al.	2022	–	0.45	–	79	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

ℹ️

1 2