Basel 7

(MWSC 932)

0.21 UTI

0.0

C_N

0.04

C_dens

0.12

C_C3

0.44

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 18

Radius (P>50% members) 6.5 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.12 Very low quality
C_lit 0.44 Poorly studied
C_dup 1.0 Unique

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

Overview

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Basel 7 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~5.26 kpc) differs significantly from the median photometric distance (~1.68 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 Low mass Intermediate age

Data

🔍 Search references for Basel 7 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	–	99.119	8.352	0.19	0.119	-0.213	35.142
Just et al.	2023	99.068	8.331	–	–	–	–
Loktin & Popova	2017	99.15	8.35	–	-0.47	-0.428	–
Kharchenko et al.	2016	99.068	8.331	–	–	–	–
Dias et al.	2014	99.15	8.35	–	0.31	0.47	–
Kharchenko et al.	2013	99.075	8.33	–	-2.59	-1.75	–
van den Bergh	2006	99.15	8.35	–	–	–	–
Dias et al.	2002	99.15	8.35	–	0.31	0.47	–

💡 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	–	–	–	127	–	39	–	–
Loktin & Popova	2017	1.77	1.22	–	131	–	–	–	–
Kharchenko et al.	2016	1.56	1.29	–	127	–	–	–	–
Kharchenko et al.	2013	1.56	1.29	–	127	–	–	–	–
van den Bergh	2006	1.68	1.24	–	107	–	–	–	–
Dias et al.	2002	1.68	1.23	–	108	–	–	–	–

Visualization

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