Ivanov 7

(MWSC 1249)

0.30 UTI

0.0

C_N

0.33

C_dens

0.38

C_C3

0.4

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 1.6 [N/pc²]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.33 Loose
C_C3 0.38 Low quality
C_lit 0.4 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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

(*): The parallax distance estimate (~4.51 kpc) differs significantly from the median photometric distance (~3.40 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.

Distant Moderate extinction Intermediate age

Data

🔍 Search references for Ivanov 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–	112.657	-15.307	0.222	-1.432	1.716	57.846
Just et al.	2023	112.656	-15.301	–	–	–	–
Kharchenko et al.	2016	112.656	-15.301	–	–	–	–
Dias et al.	2014	112.667	-15.3	–	-2.91	0.76	–
Kharchenko et al.	2013	112.662	-15.303	–	-7.27	4.74	–
Bukowiecki et al.	2011	112.638	-15.296	–	–	–	–
Dias et al.	2002	112.667	-15.3	–	-7.27	4.74	–

💡 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–	3.395	1.605	–	501	–	973	–	–
Just et al.	2023	–	–	–	501	–	1102	–	–
Kharchenko et al.	2016	4.14	2.06	–	501	–	–	–	–
Kharchenko et al.	2013	4.14	2.06	–	501	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	844	–	–
Bukowiecki et al.	2011	2.65⁽¹⁾	1.12	–	355	–	–	–	–
Dias et al.	2002	2.30	1.15	–	355	–	–	–	–

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

Visualization

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