NGC 6858

(MWSC 3233)

0.46 UTI

0.52

C_N

0.15

C_dens

0.75

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 53

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 0.15 Very loose
C_C3 0.75 High quality
C_lit 0.45 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 6858 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a very close^* distance, below the mid-plane, affected by low extinction. It is catalogued as an old cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~0.46 kpc) differs significantly from the median photometric distance (~2.11 kpc).

Note: This object shares a significant percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Low extinction Old

Data

🔍 Search references for NGC 6858 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–	300.721	11.156	2.155	-1.672	-11.946	-8.921
Just et al.	2023	300.743	11.258	–	–	–	–
He et al.	2022	300.984	12.437	2.151	-1.66	-11.882	–
Bica et al.	2019	300.738	11.256	–	–	–	–
Loktin & Popova	2017	300.75	11.25	–	1.312	-4.73	–
Kharchenko et al.	2016	300.743	11.258	–	–	–	–
Dias et al.	2014	300.733	11.258	–	1.82	-0.51	–
Kharchenko et al.	2013	300.75	11.26	–	-0.41	-3.68	–
Dias et al.	2002	300.733	11.258	–	1.82	-0.51	–

💡 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–	2.11	0.78	–	2344	–	251	–	–
Just et al.	2023	–	–	–	2344	–	251	–	–
He et al.	2022	–	0.25	–	141	–	–	–	–
Loktin & Popova	2017	3.77	1.27	–	832	–	–	–	–
Kharchenko et al.	2016	2.11	0.78	–	2344	–	–	–	–
Kharchenko et al.	2013	2.11	0.78	–	2344	–	–	–	–
Dias et al.	2002	1.31	0.40	–	2512	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Theia 247	60.4	300.33	10.5	2.18	-1.62	-12.24	-9.02	0.09
CWNU 1255	15.1	300.28	9.47	2.22	-1.59	-12.42	-8.29	0.11

💡 Note: The % column shows the percentage of members that NGC 6858 shares with each listed object.

Visualization

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