NGC 6989

0.05 UTI

0.0

C_N

0.13

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 18

Stellar density (N₅₀/rad) 0.6 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.13 Very loose
C_C3 0.12 Very low quality
C_lit 0.0 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 6989 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 8 years.

(*): The parallax distance estimate (~3.97 kpc) differs significantly from the median photometric distance (~1.91 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.

Relatively close Intermediate age

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

Dias et al. (2002)
Asterism (Archinal, B. A. & Hynes, S. J. 2003); cat V3.5 (Jan 2016)

Data

🔍 Search references for NGC 6989 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–	313.449	45.266	0.252	-4.324	-4.613	–
Dib et al.	2018	313.492	45.24	–	–	–	–

💡 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–	1.91	–	–	562	–	–	–	–
Dib et al.	2018	1.91	–	–	562	–	–	–	–

Visualization

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