Kumar 21

(MWSC 3605)

0.21 UTI

0.0

C_N

0.03

C_dens

0.25

C_C3

0.38

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 14

Radius (P>50% members) 4.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.25 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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Kumar 21 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by very high extinction. It is catalogued as a young cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~7.47 kpc) differs significantly from the median photometric distance (~2.50 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 Very high extinction Young

Data

🔍 Search references for Kumar 21 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	–	334.003	60.053	0.134	-2.703	-1.775	-111.854
He et al.	2023	334.083	60.097	0.179	-2.181	-1.651	-97.02
Just et al.	2023	334.081	60.099	–	–	–	–
Kharchenko et al.	2016	334.081	60.099	–	–	–	–
Kharchenko et al.	2013	334.087	60.103	–	-1.55	-2.34	–
Kharchenko et al.	2012	334.087	60.103	–	-1.55	-2.34	–
Dias et al.	2002	334.083	60.102	–	3.02	12.02	–

💡 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
He et al.	2023	7.24	5.50	–	2	–	–	–	–
Just et al.	2023	–	–	–	48	–	59	–	–
Kharchenko et al.	2016	2.50	5.12	–	48	–	–	–	–
Kharchenko et al.	2013	2.50	5.12	–	48	–	–	–	–
Kharchenko et al.	2012	2.50	5.12	–	48	–	–	–	–
Dias et al.	2002	2.50	5.12	–	48	–	–	–	–

Visualization

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