NGC 6996

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0.77 UTI
1.0
CN
1.0
Cdens
0.75
CC3
0.55
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 526
Radius (P>50% members) 10.8 [arcmin]
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.55 Moderately studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 6996 is a very rich, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

Note: This object shares a large percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Close Moderate extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for NGC 6996 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 – 314.154 44.62 1.13 -4.296 -6.933 -20.114
Hu & Soubiran 2025 314.179 44.63 – – – –
Zhang et al. 2024 314.129 44.622 – – – –
Hunt & Reffert 2024 314.129 44.622 1.136 -4.286 -6.928 -18.664
Cavallo et al. 2024 314.179 44.63 1.136 – – –
Hunt & Reffert 2023 314.129 44.622 1.136 -4.286 -6.928 -18.664
SΓ‘nchez et al. 2020 314.125 44.633 – -4.33 -6.867 –
Dias et al. 2014 314.125 44.633 – -3.61 -5.95 –
van den Bergh 2006 314.104 45.47 – – – –
Dias et al. 2002 314.125 44.633 – -2.9 -8.4 –

πŸ’‘ 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
Hu & Soubiran 2025 – – – – -0.170* – – –
Zhang et al. 2024 – – – – 0.077* – – –
Hunt & Reffert 2024 – – – – – 1634* – –
Cavallo et al. 2024 0.87 1.88 – 575 0.370 – – –
Hunt & Reffert 2023 0.84 1.98 2.63 318 – – – –
van den Bergh 2006 0.62 1.67 – 100 – – – –
Dias et al. 2002 0.76 1.61 – 347 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
NGC 6997 99.6 314.16 44.63 1.13 -4.29 -6.93 -20.01 0.9

πŸ’‘ Note: The % column shows the percentage of members that NGC 6996 shares with each listed object.

Visualization
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NGC 6996 UCC
NGC 6996 HUNT23
Galactocentric position diagram