LP 55A

0.07 UTI

0.0

C_N

0.03

C_dens

0.38

C_C3

0.0

C_lit

0.92

C_dup

C3 classification BC

Number of members (P>50%) 16

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

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 0.92 Very likely unique

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

Overview

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LP 55A is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, well above the mid-plane, affected by low extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 9 years.

(*): The parallax distance estimate (~4.81 kpc) differs significantly from the median photometric distance (~2.90 kpc).

Note: This is very likely a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.92) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Intermediate age

Data

🔍 Search references for LP 55A 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	–	78.01	52.462	0.208	0.103	0.099	–
Loktin & Popova	2017	78.0	52.503	–	-3.588	-2.805	–

💡 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
Loktin & Popova	2017	2.90	0.88	–	955	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
NGC 1790	8.0	77.75	52.11	0.22	-0.07	0.1	-21.82	0.05

💡 Note: The % column shows the percentage of members that LP 55A shares with each listed object.

Visualization

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