Arches

(BDB2003 G000.12+00.01)

0.16 UTI

0.65

C_N

0.13

C_dens

0.12

C_C3

0.0

C_lit

0.88

C_dup

N_m (P>50%) 80

Core radius and density 1.0 [pc], 0.6 [pc^-2]

C3 classification DC

C_N 0.65 Moderately populated
C_dens 0.13 Very loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 0.88 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Arches is a moderately populated, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 13 years.

(*): The parallax distance estimate (~2.05 kpc) differs significantly from the median photometric distance (~8.23 kpc).

Note: This is very likely a unique object, which shares a 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=0.88) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Very distant Very young

Morales et al. (2013)
Classified as morphological type 'EC2' (partially embedded cluster). Morphological flag: cluster partially embedded.

Bica et al. (2003)
Classified as infrared cluster (IRC).

Data

🔍 Search references for Arches 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–	266.517	-28.848	0.489	0.075	-2.101	21.145
Morales et al.	2013	266.458	-28.823	–	–	–	–
Bica et al.	2003	266.467	-28.829	–	–	–	–

💡 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–	8.23	–	–	2	–	–	–	–
Morales et al.	2013	8.23	–	–	2	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Dutra Bica 5	12.5	266.79	-28.78	0.38	0.11	-2.15	-22.0	0.47
VVV 146	6.2	266.57	-28.81	0.49	0.29	-1.58	–	0.1
Dutra Bica 4	5.0	266.79	-28.81	0.36	-0.02	-2.22	-26.8	0.07
Dutra Bica 6	3.8	266.84	-28.81	0.35	0.02	-2.22	-18.64	0.11

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

Visualization

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