Riddle 5

(MWSC 1279)

0.08 UTI

0.0

C_N

0.04

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 21

Radius (P>50% members) 7.2 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

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

Overview

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Riddle 5 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 an intermediate-age cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~4.69 kpc) differs significantly from the median photometric distance (~2.71 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 Intermediate age

Dias et al. (2002)
Asterism (Kronberger, M. 2005, private communication)

Data

🔍 Search references for Riddle 5 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	–	114.197	-24.672	0.213	-1.554	3.035	93.534
Just et al.	2023	114.191	-24.659	–	–	–	–
Kharchenko et al.	2016	114.191	-24.659	–	–	–	–
Kharchenko et al.	2013	114.196	-24.662	–	-1.32	4.01	–

💡 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	–	–	–	582	–	195	–	–
Kharchenko et al.	2016	2.71	2.77	–	582	–	–	–	–
Kharchenko et al.	2013	2.71	2.77	–	582	–	–	–	–

Visualization

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