Ivanov 8

(MWSC 1470; BPI 8)

0.74 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.48

C_lit

1.0

C_dup

N_m (P>50%) 115

Core radius and density 0.8 [pc], 16 [pc^-2]

C3 classification AA

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.48 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 8 is a rich, very dense object of very high C3 quality. Its parallax locates it at a large^* distance, near the mid-plane, affected by high extinction. It is catalogued as a metal-poor, young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~6.50 kpc) differs significantly from the median photometric distance (~3.91 kpc).

Distant High extinction Metal-poor Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.33 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.33 (50th percentile).

Data

🔍 Search references for Ivanov 8 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–	124.785	-35.656	0.154	-2.343	3.611	95.591
Hunt & Reffert	2024	124.788	-35.654	0.182	-2.325	3.617	80.653
Cavallo et al.	2024	124.789	-35.629	0.178	–	–	–
Hunt & Reffert	2023	124.788	-35.654	0.182	-2.325	3.617	80.653
Just et al.	2023	124.785	-35.647	–	–	–	–
Cantat-Gaudin et al.	2020	124.794	-35.658	0.088	-2.375	3.543	–
Sánchez et al.	2020	124.792	-35.65	–	-1.986	3.684	–
Cantat-Gaudin & Anders	2020	124.794	-35.658	0.088	-2.375	3.543	–
Bica et al.	2019	124.79	-35.648	–	–	–	–
Cantat-Gaudin et al.	2018	124.794	-35.658	0.088	-2.375	3.543	–
Dib et al.	2018	124.791	-35.65	–	–	–	–
Sampedro et al.	2017	124.792	-35.65	–	–	–	–
Joshi et al.	2016	124.791	-35.65	–	–	–	–
Kharchenko et al.	2016	124.785	-35.647	–	–	–	–
Kharchenko et al.	2013	124.791	-35.65	–	-3.0	4.02	–
Bukowiecki et al.	2011	124.792	-35.656	–	–	–	–
Dias et al.	2002	124.792	-35.65	–	-3.0	4.02	–

💡 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–	3.91	3.41	2.0	95	-0.660	268	–	–
Hunt & Reffert	2024	4.75	3.75	2.00	583	–	493⁽¹⁾	–	–
Cavallo et al.	2024	5.37	4.47	–	437	-0.660	–	–	–
Hunt & Reffert	2023	4.74	3.75	2.00	583	–	–	–	–
Just et al.	2023	–	–	–	63	–	44	–	–
Kounkel et al.	2020	3.42	3.45	–	95	–	–	–	–
Cantat-Gaudin & Anders	2020	8.58	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	8.58	–	–	–	–	–	–	–
Dib et al.	2018	1.19	–	–	63	–	–	–	–
Joshi et al.	2016	1.19	1.51	–	63	–	–	–	–
Kharchenko et al.	2016	1.19	1.51	–	63	–	–	–	–
Kharchenko et al.	2013	1.19	1.51	–	63	–	–	–	–
Bukowiecki et al.	2011	3.93⁽¹⁾	3.31	–	1585	–	–	–	–
Dias et al.	2002	3.89	3.41	–	1585	–	–	–	–

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

Visualization

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