Haffner 22

(VDBH 21; MWSC 1450; vdBergh-Hagen 21; OCL 691; ESO 430 24; FSR 1333; FoF 590)

0.98 UTI

0.9

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 492

Stellar density (N₅₀/rad) 19.7 [N/pc²]

C3 classification AA

C_N 0.9 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Haffner 22 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Relatively close Low extinction Near-solar metallicity Old Contains BSS

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Haffner 22 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–	123.103	-27.919	0.35	-1.608	2.898	32.665
Li et al.	2025	123.108	-27.913	0.329	-1.638	2.878	–
Hu & Soubiran	2025	123.104	-27.914	–	–	–	–
Almeida et al.	2025	123.104	-27.902	–	–	–	–
Hunt & Reffert	2024	123.112	-27.912	0.355	-1.611	2.906	31.798
Cavallo et al.	2024	123.104	-27.914	0.356	–	–	–
Hunt & Reffert	2023	123.112	-27.912	0.355	-1.611	2.906	31.798
Cordoni et al.	2023	123.104	-27.902	0.331	-1.635	2.875	–
Just et al.	2023	123.107	-27.887	–	–	–	–
Dias et al.	2021	123.104	-27.902	0.331	-1.635	2.875	33.086
Cantat-Gaudin et al.	2020	123.108	-27.913	0.329	-1.638	2.878	–
Sánchez et al.	2020	123.112	-27.9	–	-1.665	2.827	–
Cantat-Gaudin & Anders	2020	123.108	-27.913	0.329	-1.638	2.878	–
Liu & Pang	2019	123.085	-27.908	0.325	-1.765	2.779	–
Bossini et al.	2019	123.108	-27.913	–	–	–	–
Soubiran et al.	2018	123.108	-27.913	–	–	–	33.23
Bica et al.	2019	123.122	-27.889	–	–	–	–
Cantat-Gaudin et al.	2018	123.108	-27.913	0.329	-1.638	2.878	–
Kharchenko et al.	2016	123.107	-27.887	–	–	–	–
Dias et al.	2014	123.112	-27.9	–	-1.95	2.67	–
Kharchenko et al.	2013	123.112	-27.89	–	-4.52	6.9	–
Dias et al.	2002	123.112	-27.9	–	-1.95	2.67	–

💡 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–	2.79	0.62	0.55	2190	-0.034	812	0.47	0.07
Li et al.	2025	2.65	0.50	–	2363	-0.034	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.140⁽⁵⁾	–	–	–
Almeida et al.	2025	2.70	0.70	–	2438	–	663	–	–
Hunt & Reffert	2024	–	–	–	–	–	2356⁽¹⁾	–	–
Cavallo et al.	2024	2.50	0.58	–	1660	0.100	–	–	–
Hunt & Reffert	2023	2.50	0.25	0.55	1690	–	–	–	–
Cordoni et al.	2023	2.70	0.70	–	2438	-0.347	940	0.47	0.07
Just et al.	2023	–	–	–	1549	–	684	–	–
Dias et al.	2021	2.70	0.70	–	2438	-0.347	–	–	–
Cantat-Gaudin et al.	2020	2.81	0.33	–	2455	–	–	–	–
Cantat-Gaudin & Anders	2020	2.79	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	2190	0.500	–	–	–
Bossini et al.	2019	3.12	0.50	–	1888	0.000	–	–	–
Soubiran et al.	2018	2.79	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.79	–	–	–	–	–	–	–
Kharchenko et al.	2016	2.80	0.64	–	1549	–	–	–	–
Kharchenko et al.	2013	2.80	0.64	–	1549	–	–	–	–
Dias et al.	2002	3.05	0.62	–	2512	–	–	–	–

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

Visualization

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