S242

(Sh2 242; MWSC 685)

0.13 UTI

0.0

C_N

0.02

C_dens

0.12

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 15

Stellar density (N₅₀/rad) 0.1 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.12 Very low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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S242 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.68 kpc) differs significantly from the median photometric distance (~2.19 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 Very young

Lada & Lada (2003)
Embedded cluster within ∼2 Kpc of the Sun.

Data

🔍 Search references for S242 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–	88.012	26.954	0.272	-0.325	-1.329	–
Just et al.	2023	88.044	26.959	–	–	–	–
Kharchenko et al.	2016	88.044	26.959	–	–	–	–
Kharchenko et al.	2013	88.053	26.958	–	-0.23	-4.74	9.8
Lada & Lada	2003	88.054	26.992	–	–	–	–

💡 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–	2.19	2.9	–	3	–	60	–	–
Just et al.	2023	–	–	–	3	–	39	–	–
Kharchenko et al.	2016	2.19	2.90	–	3	–	–	–	–
Kharchenko et al.	2013	2.19	2.90	–	3	–	–	–	–
Lada & Lada	2003	2.10	–	–	–	–	81	–	–

Visualization

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