NGC 3231

0.13 UTI

0.25

C_N

0.4

C_dens

0.0

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 2.0 [N/pc²]

C3 classification DD

C_N 0.25 Poorly populated
C_dens 0.4 Loose
C_C3 0.0 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 3231 is a poorly populated, loose object of very low C3 quality. Its parallax locates it at a relatively close^* distance, well above the mid-plane, affected by low extinction. It is catalogued as a low-mass, old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~1.22 kpc) differs significantly from the median photometric distance (~0.90 kpc).

⚠️ 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.

Close Low extinction Low mass Old

Cantat-Gaudin et al. (2020)
Non-existent according to the Revised NGC. Gaia DR2 shows no coherent kinematic group; possibly a remnant or field fluctuation. More details in Appendix A of the article.

Data

🔍 Search references for NGC 3231 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–	156.813	66.831	0.819	-2.766	-0.967	1.593
Angelo et al.	2019	156.742	66.798	–	–	–	–
Dias et al.	2002	156.871	66.798	–	-3.86	-0.21	–

💡 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–	0.895	0.06	–	1706	–	11	–	–
Angelo et al.	2019	1.08	–	–	2000	–	11	–	–
Dias et al.	2002	0.71	0.06	–	1413	–	–	–	–

Visualization

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