Ruprecht 73

(MWSC 1615; OCL 769; ESO 211 06)

0.21 UTI

0.0

C_N

0.18

C_dens

0.25

C_C3

0.31

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 20

Radius (P>50% members) 5.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.18 Very loose
C_C3 0.25 Low quality
C_lit 0.31 Poorly studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 73 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~2.87 kpc) differs significantly from the median photometric distance (~1.62 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.

Relatively close Moderate extinction Low mass Intermediate age

Data

🔍 Search references for Ruprecht 73 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	–	135.295	-50.916	0.349	-5.651	6.224	14.154
Just et al.	2023	135.286	-50.914	–	–	–	–
Bica et al.	2019	135.301	-50.908	–	–	–	–
Kharchenko et al.	2016	135.286	-50.914	–	–	–	–
Dias et al.	2014	135.292	-50.917	–	-4.04	4.79	–
Kharchenko et al.	2013	135.291	-50.917	–	-4.16	1.07	–

💡 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
Just et al.	2023	–	–	–	759	–	8	–	–
Kharchenko et al.	2016	1.62	1.94	–	759	–	–	–	–
Kharchenko et al.	2013	1.62	1.94	–	759	–	–	–	–

Visualization

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