Ruprecht 19

(MWSC 1218)

0.46 UTI

0.31

C_N

0.22

C_dens

0.5

C_C3

0.65

C_lit

1.0

C_dup

N_m (P>50%) 31

Core radius and density 1.5 [pc], 1.1 [pc^-2]

C3 classification BB

C_N 0.31 Poorly populated
C_dens 0.22 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.65 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 19 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Palma et al. (2025)
Classified as optical pair P341, along with CWNU_2116.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1775, e_all=0.1177.

Data

🔍 Search references for Ruprecht 19 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–	111.478	-21.837	0.685	-2.594	3.849	35.654
Li et al.	2025	111.48	-21.844	0.679	-2.605	3.841	–
Almeida et al.	2025	111.464	-21.838	–	–	–	–
Hunt & Reffert	2024	111.499	-21.83	0.691	-2.589	3.857	41.916
Cavallo et al.	2024	111.455	-21.806	0.689	–	–	–
Hunt & Reffert	2023	111.499	-21.83	0.691	-2.589	3.857	41.916
Almeida et al.	2023	111.464	-21.818	–	–	–	–
Just et al.	2023	111.451	-21.561	–	–	–	–
Tarricq et al.	2022	111.53	-21.834	0.689	-2.599	3.842	–
Dias et al.	2021	111.464	-21.838	0.687	-2.606	3.82	–
Cantat-Gaudin et al.	2020	111.48	-21.844	0.679	-2.605	3.841	–
Cantat-Gaudin & Anders	2020	111.48	-21.844	0.679	-2.605	3.841	–
Cantat-Gaudin et al.	2018	111.48	-21.844	0.679	-2.605	3.841	–
Dias et al.	2018	–	–	–	-2.1	2.47	–
Dib et al.	2018	111.457	-21.563	–	–	–	–
Loktin & Popova	2017	111.45	-21.563	–	-1.958	2.859	–
Sampedro et al.	2017	111.463	-21.583	–	-2.47	-0.05	–
Joshi et al.	2016	111.457	-21.563	–	–	–	–
Kharchenko et al.	2016	111.451	-21.561	–	–	–	–
Dias et al.	2014	111.463	-21.583	–	-1.16	-0.82	–
Kharchenko et al.	2013	111.457	-21.563	–	-2.43	1.89	–
Lynga	1987	111.435	-21.517	–	–	–	–

💡 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–	1.41	0.39	0.71	100	-0.068	181	0.53	–
Li et al.	2025	1.27	0.39	–	67	-0.249	–	–	–
Almeida et al.	2025	1.36	0.41	–	71	–	145	–	–
Hunt & Reffert	2024	1.37	0.15	0.71	136	–	220⁽¹⁾	–	–
Cavallo et al.	2024	1.48	0.35	–	91	0.270	–	–	–
Hunt & Reffert	2023	1.37	0.15	0.71	136	–	–	–	–
Almeida et al.	2023	1.37	0.34	–	85	-0.048	217⁽¹⁾	0.53	–
Just et al.	2023	–	–	–	100	–	107	–	–
Tarricq et al.	2022	1.36	–	–	78	–	–	–	–
Dias et al.	2021	1.36	0.41	–	71	-0.088	–	–	–
Cantat-Gaudin et al.	2020	1.41	0.31	–	72	–	–	–	–
Kounkel et al.	2020	1.48	0.46	–	117	–	–	–	–
Cantat-Gaudin & Anders	2020	1.41	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.41	–	–	–	–	–	–	–
Dib et al.	2018	1.80	–	–	100	–	–	–	–
Loktin & Popova	2017	3.00	0.32	–	1380	–	–	–	–
Joshi et al.	2016	1.80	0.66	–	100	–	–	–	–
Kharchenko et al.	2016	1.80	0.66	–	100	–	–	–	–
Kharchenko et al.	2013	1.80	0.66	–	100	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 14123	90.3	111.5	-21.83	0.69	-2.57	3.84	35.65	0.08

💡 Note: The % column shows the percentage of members that Ruprecht 19 shares with each listed object.

Visualization

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