NGC 6873

(MWSC 3263)

0.15 UTI

0.0

C_N

0.03

C_dens

0.25

C_C3

0.23

C_lit

1.0

C_dup

N_m (P>50%) 16

Core radius and density 2.4 [pc], 0.2 [pc^-2]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.25 Low quality
C_lit 0.23 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 6873 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a massive, old cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~5.58 kpc) differs significantly from the median photometric distance (~3.02 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.

Distant Moderate extinction Massive Old

Data

🔍 Search references for NGC 6873 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–	301.967	21.121	0.179	-3.074	-5.399	5.31
Just et al.	2023	301.913	21.087	–	–	–	–
Bica et al.	2019	302.078	21.094	–	–	–	–
Dias et al.	2018	–	–	–	-4.11	-4.61	–
Sampedro et al.	2017	301.933	21.098	–	-2.87	-5.82	–
Kharchenko et al.	2016	301.913	21.087	–	–	–	–
Tadross	2014	301.804	21.102	–	–	–	–
Dias et al.	2014	301.933	21.098	–	-2.73	-5.82	–
Kharchenko et al.	2013	301.92	21.09	–	-3.0	-6.85	–
Dias et al.	2002	301.933	21.098	–	-2.73	-5.82	–

💡 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–	3.02	1.04	–	1496	–	1637	–	–
Just et al.	2023	–	–	–	1496	–	1637	–	–
Kharchenko et al.	2016	4.79	0.98	–	1496	–	–	–	–
Tadross	2014	1.25	1.10	–	880	–	–	–	–
Kharchenko et al.	2013	4.79	0.98	–	1496	–	–	–	–
Dias et al.	2002	1.25	1.10	–	871	–	–	–	–

Visualization

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