UPK 138

0.43 UTI

0.5

C_N

1.0

C_dens

0.62

C_C3

0.0

C_lit

1.0

C_dup

C3 classification AC

Number of members (P>50%) 50

Radius (P>50% members) 7.4 [arcmin]

C_N 0.5 Moderately populated
C_dens 1.0 Very dense
C_C3 0.62 Intermediate 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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UPK 138 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.

Close Moderate extinction Very young

Data

🔍 Search references for UPK 138 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	–	320.585	46.863	1.446	-0.372	-1.818	-9.659
He et al.	2022	320.596	46.83	1.457	-0.355	-1.794	–
Sim et al.	2019	320.684	46.859	–	-0.41	-1.78	–

💡 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.	2022	–	2.60	–	2	–	–	–	–
Sim et al.	2019	0.68	–	–	3	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Theia 26	20.0	320.54	46.96	1.36	0.33	-1.89	8.75	0.11

💡 Note: The % column shows the percentage of members that UPK 138 shares with each listed object.

Visualization

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