Ruprecht 90

0.23 UTI

0.0

C_N

0.17

C_dens

0.5

C_C3

0.23

C_lit

1.0

C_dup

N₅₀ (P>50% members) 18

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.17 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.23 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 90 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as an extremely massive, very young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 8 years.

⚠️ 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 Extremely massive Very young

Data

🔍 Search references for Ruprecht 90 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–	157.943	-58.241	0.351	-7.163	3.262	–
Dias et al.	2018	–	–	–	-8.01	3.08	–
Sampedro et al.	2017	157.75	-58.45	-3.37	0.9	–	–
Dias et al.	2014	157.75	-58.45	–	-3.9	1.53	–
Gozha et al.	2012	157.75	-58.45	–	–	–	–
Piskunov et al.	2008	157.952	-58.237	–	–	–	–
Kharchenko et al.	2007	157.75	-58.45	–	0.18	–	-40.0
Kharchenko et al.	2005	157.95	-58.24	–	-6.8	3.47	-40.0
Kharchenko et al.	2003	157.95	-58.24	–	-6.71	2.54	–
Lynga	1987	157.747	-58.243	–	–	–	–

💡 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–	3.5	1.01	–	13	–	79433	–	–
Gozha et al.	2012	1.00	–	–	13	–	79433	–	–
Piskunov et al.	2008	6.00	1.01	–	13	–	–	–	–
Kharchenko et al.	2005	6.00	1.01	–	13	–	–	–	–
Kharchenko et al.	2003	1.00	0.63	–	–	–	–	–	–

Visualization

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