Ruprecht 25

(OCL 641; ESO 493 01; MWSC 1280)

0.74 UTI

0.56

C_N

1.0

C_dens

0.75

C_C3

0.7

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 62

Radius (P>50% members) 1.3 [arcmin]

C_N 0.56 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Ruprecht 25 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a large distance, below 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

Very distant Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 25 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	–	114.197	-23.385	0.128	-1.062	1.96	95.694
Hu & Soubiran	2025	114.198	-23.368	–	–	–	–
Almeida et al.	2025	114.184	-23.383	–	–	–	–
Hunt & Reffert	2024	114.198	-23.386	0.099	-1.056	1.903	105.62
Cavallo et al.	2024	114.198	-23.368	0.102	–	–	–
Hunt & Reffert	2023	114.198	-23.386	0.099	-1.056	1.903	105.62
Almeida et al.	2023	114.186	-23.384	–	–	–	–
Dias et al.	2021	114.184	-23.383	0.115	-1.128	1.988	–
Cantat-Gaudin et al.	2020	114.192	-23.387	0.123	-1.101	1.993	–
Cantat-Gaudin & Anders	2020	114.192	-23.387	0.123	-1.101	1.993	–
Bica et al.	2019	114.192	-23.38	–	–	–	–
Cantat-Gaudin et al.	2018	114.192	-23.387	0.123	-1.101	1.993	–
Dias et al.	2014	114.196	-23.383	–	0.36	1.67	–

💡 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
Hu & Soubiran	2025	–	–	–	–	-0.210*	–	–	–
Almeida et al.	2025	6.12	1.84	–	724	–	425	–	–
Hunt & Reffert	2024	–	–	–	–	–	707*	–	–
Cavallo et al.	2024	4.31	2.34	–	1023	-1.200	–	–	–
Hunt & Reffert	2023	7.63	2.09	2.32	440	–	–	–	–
Almeida et al.	2023	5.62	1.86	–	857	-0.366	400*	0.74	–
Dias et al.	2021	6.12	1.84	–	724	-0.241	–	–	–
Cantat-Gaudin et al.	2020	8.75	1.44	–	316	–	–	–	–
Cantat-Gaudin & Anders	2020	6.57	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	6.57	–	–	–	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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