Ruprecht 158

(MWSC 1592; OCL 736; ESO 371 23)

0.21 UTI

0.0

C_N

0.04

C_dens

0.38

C_C3

0.31

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 17

Radius (P>50% members) 6.1 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.38 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 158 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~5.05 kpc) differs significantly from the median photometric distance (~2.72 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 Old

Dias et al. (2002)
Field fluctuation (Vázquez, R. A. et al. 2010, A&A 511, 38)

Data

🔍 Search references for Ruprecht 158 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	–	133.09	-37.6	0.198	-3.166	2.993	–
Just et al.	2023	133.105	-37.552	–	–	–	–
Bica et al.	2019	133.106	-37.56	–	–	–	–
Kharchenko et al.	2016	133.105	-37.552	–	–	–	–
Kharchenko et al.	2013	133.11	-37.555	–	-1.3	2.32	–
van den Bergh	2006	133.075	-37.567	–	–	–	–

💡 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	–	–	–	1413	–	276	–	–
Kharchenko et al.	2016	2.72	1.23	–	1413	–	–	–	–
Kharchenko et al.	2013	2.72	1.23	–	1413	–	–	–	–
van den Bergh	2006	4.17	0.74	–	1585	–	–	–	–

Visualization

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