King 7

(MWSC 321; FoF 366)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 775

Stellar density (N₅₀/rad) 82.6 [N/pc²]

C3 classification AA

C_N 1.0 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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King 7 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, 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 High extinction Massive Near-solar metallicity Intermediate age Contains BSS

Cavallo et al. (2024)
Gold sample.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.

Data

🔍 Search references for King 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	99999–	59.788	51.785	0.304	1.125	-1.189	-9.83
Almeida et al.	2025	59.775	51.784	–	–	–	–
Zhang et al.	2024	59.786	51.787	–	–	–	–
Hunt & Reffert	2024	59.786	51.787	0.301	1.129	-1.187	13.963
Cavallo et al.	2024	59.783	51.783	0.3	–	–	–
Hunt & Reffert	2023	59.786	51.787	0.301	1.129	-1.187	13.963
Just et al.	2023	59.767	51.781	–	–	–	–
Jaehnig et al.	2021	59.783	51.789	0.319	1.156	-1.193	–
Rain et al.	2021	59.783	51.785	0.286	1.121	-1.196	–
Dias et al.	2021	59.775	51.784	0.277	1.136	-1.193	-9.469
Spina et al.	2021	59.783	51.785	0.277	1.13	-1.188	–
Cantat-Gaudin et al.	2020	59.783	51.785	0.286	1.121	-1.196	–
Donor et al.	2020	59.778	51.782	–	0.97	-1.35	-9.7
Zhong et al.	2020	59.783	51.785	–	1.121	-1.196	-16.224
Cantat-Gaudin & Anders	2020	59.783	51.785	0.286	1.121	-1.196	–
Liu & Pang	2019	59.792	51.779	0.297	1.058	-1.211	–
Soubiran et al.	2018	59.783	51.785	–	–	–	-9.57
Cantat-Gaudin et al.	2018	59.783	51.785	0.286	1.121	-1.196	–
Loktin & Popova	2017	59.775	51.782	–	-1.688	1.318	–
Kharchenko et al.	2016	59.767	51.781	–	–	–	–
Dias et al.	2014	59.75	51.8	–	0.83	-1.36	–
Kharchenko et al.	2013	59.778	51.782	–	-2.56	1.26	–
Gozha et al.	2012	59.75	51.8	–	–	–	–
Kharchenko et al.	2012	59.778	51.782	–	-2.33	1.38	–
Bukowiecki et al.	2011	59.779	51.784	–	–	–	–
van den Bergh	2006	59.75	51.8	–	–	–	–
Dias et al.	2002	59.75	51.8	–	0.83	-1.36	–

💡 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–	2.765	3.87	2.62	646	-0.041	3744	–	7.0
Almeida et al.	2025	2.59	3.55	–	324	–	2898	–	–
Zhang et al.	2024	–	–	–	–	-0.106⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	7497⁽¹⁾	–	–
Cavallo et al.	2024	3.33	4.25	–	166	0.160	–	–	–
Hunt & Reffert	2023	2.90	4.18	2.62	191	–	–	–	–
Just et al.	2023	–	–	–	708	–	2128	–	–
Jaehnig et al.	2021	3.14⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.17	3.88	–	661	–	–	–	7
Dias et al.	2021	2.59	3.55	–	324	-0.039	–	–	–
Spina et al.	2021	3.45	–	–	224	-0.155⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	3.18	3.18	–	224	–	–	–	–
Donor et al.	2020	–	–	–	–	-0.130	–	–	–
Zhong et al.	2020	2.63	3.87	–	8850	-0.041	–	–	–
Cantat-Gaudin & Anders	2020	3.17	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1150	0.250	–	–	–
Soubiran et al.	2018	3.17	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.17	–	–	–	–	–	–	–
Loktin & Popova	2017	1.70	3.39	–	427	–	–	–	–
Kharchenko et al.	2016	2.63	3.87	–	708	–	–	–	–
Kharchenko et al.	2013	2.63	3.87	–	708	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	4591	–	–
Gozha et al.	2012	2.20	–	–	661	0.030	–	–	–
Kharchenko et al.	2012	2.63	3.87	–	716	–	–	–	–
Bukowiecki et al.	2011	3.91⁽¹⁾	3.41	–	447	–	–	–	–
van den Bergh	2006	2.20	3.88	–	631	–	–	–	–
Dias et al.	2002	2.20	3.88	–	661	-0.170	–	–	–

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

Visualization

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