Ruprecht 74

(MWSC 1655; OCL 749; ESO 372 17)

0.09 UTI

0.0

C_N

0.07

C_dens

0.12

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 2.1 [pc], 0.4 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.12 Very low quality
C_lit 0.13 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Ruprecht 74 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, well above the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~4.63 kpc) differs significantly from the median photometric distance (~3.07 kpc).

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Intermediate age

Data

🔍 Search references for Ruprecht 74 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–	140.235	-37.132	0.216	-4.647	3.626	100.998
Just et al.	2023	140.244	-37.113	–	–	–	–
Bica et al.	2019	140.259	-37.114	–	–	–	–
Sampedro et al.	2017	140.262	-37.117	–	-4.06	3.5	–
Kharchenko et al.	2016	140.244	-37.113	–	–	–	–
Kharchenko et al.	2013	140.25	-37.117	–	-5.43	3.25	–
Lynga	1987	140.252	-37.065	–	–	–	–

💡 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–	3.07	2.56	–	794	–	95	–	–
Just et al.	2023	–	–	–	794	–	95	–	–
Kharchenko et al.	2016	3.07	2.56	–	794	–	–	–	–
Kharchenko et al.	2013	3.07	2.56	–	794	–	–	–	–

Visualization

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