Haffner 25

(MWSC 1346; OCL 656; ESO 493 15)

0.16 UTI

0.0

C_N

0.05

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 20

Radius (P>50% members) 7.7 [arcmin]

C_N 0.0 Sparse
C_dens 0.05 Very loose
C_C3 0.25 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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Haffner 25 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

⚠️ 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.

Distant Moderate extinction Intermediate age

Dias et al. (2002)
No cluster (Piatti, A. E.; Clariá, J. J.; Ahumada, A. V. 2011, NewA 16, 161)

Data

🔍 Search references for Haffner 25 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	–	117.151	-25.946	0.242	-2.638	3.497	–
Just et al.	2023	117.159	-25.951	–	–	–	–
Bica et al.	2019	117.166	-25.947	–	–	–	–
Kharchenko et al.	2016	117.159	-25.951	–	–	–	–
Kharchenko et al.	2013	117.165	-25.953	–	-4.79	3.17	–

💡 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
Just et al.	2023	–	–	–	288	–	205	–	–
Kharchenko et al.	2016	4.24	2.52	–	288	–	–	–	–
Kharchenko et al.	2013	4.24	2.52	–	288	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1434	4.0	117.13	-25.77	0.22	-2.54	3.22	–	0.52

💡 Note: The % column shows the percentage of members that Haffner 25 shares with each listed object.

Visualization

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