Koposov 53

(FSR 0856; MWSC 751; Teutsch 9; MWSC 750)

0.88 UTI

0.64

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 78

Stellar density (N₅₀/rad) 11.3 [N/pc²]

C3 classification AB

C_N 0.64 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 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

ℹ️

Koposov 53 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is very well-studied in the literature.

(*): The parallax distance estimate (~5.30 kpc) differs significantly from the median photometric distance (~3.93 kpc).

Distant Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Koposov 53 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	92.226	26.265	0.189	0.229	-0.617	11.824
Li et al.	2025	92.221	26.264	0.18	0.242	-0.632	–
Almeida et al.	2025	92.219	26.263	–	–	–	–
Zhang et al.	2024	92.23	26.26	–	–	–	–
Hunt & Reffert	2024	92.23	26.26	0.201	0.242	-0.633	16.195
Celli et al.	2024	92.234	26.264	–	–	–	–
Cavallo et al.	2024	92.192	26.251	0.203	–	–	–
Hunt & Reffert	2023	92.23	26.26	0.201	0.242	-0.633	16.195
Just et al.	2023	92.222	26.261	–	–	–	–
Dias et al.	2021	92.219	26.263	0.182	0.249	-0.647	–
Cantat-Gaudin et al.	2020	92.221	26.264	0.18	0.242	-0.632	–
Cantat-Gaudin & Anders	2020	92.221	26.264	0.18	0.242	-0.632	–
Monteiro & Dias	2019	92.229	26.266	–	0.218	-0.666	2.118
Bica et al.	2019	92.232	26.266	–	–	–	–
Cantat-Gaudin et al.	2018	92.221	26.264	0.18	0.242	-0.632	–
Loktin & Popova	2017	92.235	26.265	–	0.278	-0.791	–
Kharchenko et al.	2016	92.222	26.261	–	–	–	–
Dias et al.	2014	92.233	26.264	–	-0.3	-1.37	–
Kharchenko et al.	2013	92.23	26.26	–	0.68	-1.49	–
Glushkova et al.	2010	92.234	26.264	–	–	–	–
Koposov et al.	2008	92.234	26.264	–	–	–	–
Froebrich et al.	2007	92.229	26.266	–	–	–	–
Dias et al.	2002	92.233	26.264	–	-0.3	-1.37	–

💡 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–	3.93	1.16	1.97	114	-0.050	360	–	–
Li et al.	2025	4.52	1.39	–	45	-0.050	–	–	–
Almeida et al.	2025	3.75	1.42	–	65	–	218	–	–
Zhang et al.	2024	–	–	–	–	-0.184⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	742⁽¹⁾	–	–
Celli et al.	2024	–	–	–	16	–	485	–	–
Cavallo et al.	2024	3.93	1.13	–	331	0.230	–	–	–
Hunt & Reffert	2023	4.41	1.16	1.97	208	–	–	–	–
Just et al.	2023	–	–	–	114	–	234	–	–
Dias et al.	2021	3.75	1.42	–	65	-0.280	–	–	–
Cantat-Gaudin et al.	2020	5.15	1.53	–	16	–	–	–	–
Cantat-Gaudin & Anders	2020	4.79	–	–	–	–	–	–	–
Monteiro & Dias	2019	5.54	1.66	–	16	0.024	–	–	–
Cantat-Gaudin et al.	2018	4.79	–	–	–	–	–	–	–
Loktin & Popova	2017	2.59	0.67	–	158	–	–	–	–
Kharchenko et al.	2016	2.98	1.03	–	114	–	–	–	–
Kharchenko et al.	2013	2.98	1.03	–	114	–	–	–	–
Glushkova et al.	2010	3.20	1.05	–	316	–	–	–	–
Koposov et al.	2008	3.20	1.05	–	316	–	–	–	–
Dias et al.	2002	5.30	1.27	–	89	–	–	–	–

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

Visualization

ℹ️

1 2 3