Ivanov 9

(MWSC 1055)

0.14 UTI

0.0

C_N

0.07

C_dens

0.12

C_C3

0.25

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 23

Radius (P>50% members) 8.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.12 Very 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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Ivanov 9 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a moderate 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.

Relatively close Moderate extinction Very young

Data

🔍 Search references for Ivanov 9 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	–	104.939	-4.063	0.312	-1.77	0.796	–
Just et al.	2023	104.926	-4.065	–	–	–	–
Kharchenko et al.	2016	104.926	-4.065	–	–	–	–
Kharchenko et al.	2013	104.932	-4.067	–	0.44	3.48	42.4
Dias et al.	2002	104.929	-4.067	–	1.89	1.44	–

💡 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	–	–	–	3	–	272	–	–
Kharchenko et al.	2016	2.84	2.26	–	3	–	–	–	–
Kharchenko et al.	2013	2.84	2.26	–	3	–	–	–	–
Dias et al.	2002	0.74	0.06	–	79	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
IRAS 06567-0355	44.0	104.83	-3.94	0.36	-1.77	0.76	–	0.05

💡 Note: The % column shows the percentage of members that Ivanov 9 shares with each listed object.

Visualization

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