Ruprecht 99

(MWSC 1994; OCL 872; ESO 094 11)

0.27 UTI

0.0

C_N

0.01

C_dens

0.62

C_C3

0.35

C_lit

1.0

C_dup

N_m (P>50%) 18

Core radius and density 6.1 [pc], 0.03 [pc^-2]

C3 classification AC

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.35 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Ruprecht 99 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~6.72 kpc) differs significantly from the median photometric distance (~0.72 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.

Close Low extinction Low mass Intermediate age

Data

🔍 Search references for Ruprecht 99 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–	180.874	-63.874	0.149	-7.057	1.062	-7.403
Just et al.	2023	180.862	-63.857	–	–	–	–
Bica et al.	2019	180.822	-63.868	–	–	–	–
Dias et al.	2018	–	–	–	-7.37	-0.85	–
Dib et al.	2018	180.87	-63.86	–	–	–	–
Sampedro et al.	2017	180.767	-63.85	–	-4.88	0.06	–
Joshi et al.	2016	180.87	-63.86	–	–	–	–
Kharchenko et al.	2016	180.862	-63.857	–	–	–	–
Dias et al.	2014	180.767	-63.85	–	-4.69	0.23	–
Kharchenko et al.	2013	180.87	-63.86	–	-7.74	-2.07	–
Piskunov et al.	2008	180.818	-63.878	–	–	–	–
Kharchenko et al.	2005	180.82	-63.88	–	-7.9	-2.96	–
Dias et al.	2002	180.767	-63.85	–	-4.69	0.23	–
Lynga	1987	180.777	-63.813	–	–	–	–

💡 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–	0.72	0.16	–	237	–	24	–	–
Just et al.	2023	–	–	–	237	–	29	–	–
Dib et al.	2018	0.72	–	–	237	–	–	–	–
Joshi et al.	2016	0.72	0.16	–	237	–	18	–	–
Kharchenko et al.	2016	0.72	0.16	–	237	–	–	–	–
Kharchenko et al.	2013	0.72	0.16	–	237	–	–	–	–
Piskunov et al.	2008	0.66	0.16	–	1950	–	–	–	–
Kharchenko et al.	2005	0.66	0.16	–	1950	–	–	–	–
Dias et al.	2002	0.66	0.16	–	1950	–	–	–	–

Visualization

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