Ruprecht 157

(MWSC 1496; OCL 652; ESO 562 09)

0.19 UTI

0.0

C_N

0.09

C_dens

0.12

C_C3

0.38

C_lit

1.0

C_dup

C3 classification CD

Number of members (P>50%) 22

Radius (P>50% members) 7.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.09 Very loose
C_C3 0.12 Very low quality
C_lit 0.38 Poorly studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 157 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 poorly studied in the literature.

⚠️ 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 Intermediate age

Data

🔍 Search references for Ruprecht 157 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	–	127.451	-19.078	0.334	-3.867	3.767	1.126
Just et al.	2023	127.449	-19.117	–	–	–	–
Bica et al.	2019	127.445	-19.095	–	–	–	–
Kharchenko et al.	2016	127.449	-19.117	–	–	–	–
Dias et al.	2014	127.454	-19.1	–	-3.01	0.71	–
Kharchenko et al.	2013	127.455	-19.12	–	-2.34	4.27	–
Dias et al.	2002	127.454	-19.1	–	-3.01	0.71	–

💡 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	–	–	–	501	–	586	–	–
Kharchenko et al.	2016	2.31	1.74	–	501	–	–	–	–
Kharchenko et al.	2013	2.31	1.74	–	501	–	–	–	–
Dias et al.	2002	2.06	2.33	–	56	–	–	–	–

Visualization

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