Haffner 18

0.82 UTI

0.76

C_N

0.77

C_dens

1.0

C_C3

0.78

C_lit

1.0

C_dup

N₅₀ (P>50% members) 138

Stellar density (N₅₀/rad) 3.9 [N/pc²]

C3 classification AA

C_N 0.76 Rich
C_dens 0.77 Dense
C_C3 1.0 Very high quality
C_lit 0.78 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 18 is a rich, dense object of very high C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is well-studied in the literature.

Note: This object shares a moderate percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Very distant Moderate extinction Very young

Data

🔍 Search references for Haffner 18 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–	118.179	-26.379	0.2	-2.533	2.625	103.523
Hunt & Reffert	2024	118.165	-26.383	0.191	-2.52	2.707	–
Celli et al.	2024	118.168	-26.387	–	–	–	–
Hunt & Reffert	2023	118.165	-26.383	0.191	-2.52	2.707	–
Jaehnig et al.	2021	118.183	-26.377	0.192	-2.552	2.586	–
Rain et al.	2021	118.168	-26.387	0.185	-2.548	2.67	–
Cantat-Gaudin et al.	2020	118.168	-26.387	0.185	-2.548	2.67	–
Cantat-Gaudin & Anders	2020	118.168	-26.387	0.185	-2.548	2.67	–
Soubiran et al.	2018	118.168	-26.387	–	–	–	92.28
Cantat-Gaudin et al.	2018	118.168	-26.387	0.185	-2.548	2.67	–
Loktin & Popova	2017	118.17	-26.382	–	-3.472	0.961	60.0
Dias et al.	2014	118.162	-26.383	–	-3.98	2.73	–
van den Bergh	2006	118.125	-26.367	–	–	–	–
Dias et al.	2002	118.162	-26.383	–	-3.98	2.73	–
Dambis	1999	118.125	-26.367	–	–	–	–

💡 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–	5.08	1.89	1.62	10	–	500	–	0.0
Hunt & Reffert	2024	–	–	–	–	–	298⁽¹⁾	–	–
Celli et al.	2024	–	–	–	14	–	702	–	–
Hunt & Reffert	2023	6.82	2.42	1.62	4	–	–	–	–
Jaehnig et al.	2021	5.08⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	4.67	1.89	–	8	–	–	–	0
Cantat-Gaudin et al.	2020	5.08	1.52	–	14	–	–	–	–
Cantat-Gaudin & Anders	2020	4.67	–	–	–	–	–	–	–
Soubiran et al.	2018	4.67	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.67	–	–	–	–	–	–	–
Loktin & Popova	2017	5.51	1.79	–	11	–	–	–	–
van den Bergh	2006	6.03	1.89	–	8	–	–	–	–
Dias et al.	2002	6.03	1.89	–	8	–	–	–	–
Dambis	1999	4.57	1.28	–	16	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Haffner 19	50.0	118.19	-26.28	0.2	-2.53	2.52	111.14	0.9

💡 Note: The % column shows the percentage of members that Haffner 18 shares with each listed object.

Visualization

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