Ruprecht 53

(MWSC 1442; OCL 682; ESO 494 32)

0.72 UTI

0.54

C_N

0.89

C_dens

0.75

C_C3

0.7

C_lit

1.0

C_dup

N₅₀ (P>50% members) 57

Stellar density (N₅₀/rad) 4.5 [N/pc²]

C3 classification AB

C_N 0.54 Moderately populated
C_dens 0.89 Dense
C_C3 0.75 High quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Ruprecht 53 is a moderately populated, dense object of high C3 quality. Its parallax locates it at a relatively close^* distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~1.03 kpc) differs significantly from the median photometric distance (~1.52 kpc).

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Relatively close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 259 along with HXHWL_65.

Palma et al. (2025)
Classified as optical pair P538, along with HXHWL_65.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 53 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–	122.737	-27.027	0.968	-2.864	1.004	11.48
Hunt & Reffert	2024	122.741	-27.003	0.956	-2.877	0.99	11.802
Cavallo et al.	2024	122.728	-27.037	0.957	–	–	–
Hunt & Reffert	2023	122.741	-27.003	0.956	-2.877	0.99	11.802
Just et al.	2023	122.674	-26.937	–	–	–	–
Bica et al.	2019	122.717	-26.991	–	–	–	–
Kharchenko et al.	2016	122.674	-26.937	–	–	–	–
Dias et al.	2014	122.725	-27.0	–	-2.0	4.52	–
Kharchenko et al.	2013	122.68	-26.94	–	-0.34	5.63	–
Piskunov et al.	2008	122.692	-26.993	–	–	–	–
Kharchenko et al.	2005	122.7	-27.0	–	-1.11	0.32	–
Kharchenko et al.	2003	122.64	-27.0	–	-0.58	0.46	–
Dias et al.	2002	122.725	-26.0	–	-2.0	4.52	–

💡 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–	1.52	0.34	0.54	389	-0.070	112	–	–
Liu et al.	2025	1.05	0.01	–	479	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	126⁽¹⁾	–	–
Cavallo et al.	2024	1.00	0.19	–	309	-0.070	–	–	–
Hunt & Reffert	2023	0.97	0.09	0.54	343	–	–	–	–
Just et al.	2023	–	–	–	724	–	97	–	–
Kharchenko et al.	2016	1.52	0.84	–	724	–	–	–	–
Kharchenko et al.	2013	1.52	0.84	–	724	–	–	–	–
Piskunov et al.	2008	1.70	0.34	–	389	–	–	–	–
Kharchenko et al.	2005	1.70	0.34	–	389	–	–	–	–
Kharchenko et al.	2003	1.00	0.46	–	–	–	–	–	–
Dias et al.	2002	1.70	0.34	–	389	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1026	77.2	122.75	-27.04	0.97	-2.86	1.02	11.15	0.0

💡 Note: The % column shows the percentage of members that Ruprecht 53 shares with each listed object.

Visualization

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