Haffner 24

(MWSC 1239; OCL 608; ESO 559 14)

0.24 UTI

0.0

C_N

0.08

C_dens

0.5

C_C3

0.32

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 2.0 [pc], 0.4 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.32 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Haffner 24 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a very metal-poor, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.49 kpc) differs significantly from the median photometric distance (~2.23 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.

Relatively close Moderate extinction Very metal-poor Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for Haffner 24 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–	112.174	-18.297	0.287	-1.631	2.124	70.914
Hunt & Reffert	2024	112.166	-18.27	0.295	-1.634	2.136	70.885
Cavallo et al.	2024	112.143	-18.288	0.294	–	–	–
Hunt & Reffert	2023	112.166	-18.27	0.295	-1.634	2.136	70.885
Just et al.	2023	112.231	-18.313	–	–	–	–
Bica et al.	2019	112.22	-18.344	–	–	–	–
Dib et al.	2018	112.237	-18.315	–	–	–	–
Joshi et al.	2016	112.237	-18.315	–	–	–	–
Kharchenko et al.	2016	112.231	-18.313	–	–	–	–
Kharchenko et al.	2013	112.237	-18.315	–	-2.52	6.63	–
Bukowiecki et al.	2011	112.217	-18.308	–	–	–	–
Dias et al.	2002	112.233	-18.317	–	-2.52	6.63	–

💡 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–	2.23	1.07	0.61	309	-1.000	233	–	–
Hunt & Reffert	2024	3.10	1.07	0.61	275	–	233⁽¹⁾	–	–
Cavallo et al.	2024	2.23	1.60	–	229	-1.000	–	–	–
Hunt & Reffert	2023	3.10	1.07	0.61	275	–	–	–	–
Just et al.	2023	–	–	–	343	–	32	–	–
Dib et al.	2018	1.71	–	–	343	–	–	–	–
Joshi et al.	2016	1.71	0.85	–	343	–	–	–	–
Kharchenko et al.	2016	1.71	0.85	–	343	–	–	–	–
Kharchenko et al.	2013	1.71	0.85	–	343	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	496	–	–
Bukowiecki et al.	2011	2.95⁽¹⁾	1.48	–	79	–	–	–	–
Dias et al.	2002	2.94	1.51	–	79	–	–	–	–

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

Visualization

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