NGC 6996

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0.72 UTI
1.0
CN
1.0
Cdens
0.75
CC3
0.42
Clit
1.0
Cdup
Nm (P>50%) 526
Core radius and density 1.0 [pc], 26 [pc-2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.42 Poorly studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA 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 poorly studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.94 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.94 (50th percentile).

Bica et al. (2019)
Original NGC and IC catalogues at Vizier: NGC 2000.0, Sky Publishing, ed. Sinnott 1988 (1997yCat.7118....0S).

Data
πŸ” Search references for NGC 6996 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 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. 2018 – – – -4.19 -6.0 –
Sampedro et al. 2017 314.125 44.633 – -2.7 -5.44 –
Dias et al. 2014 314.125 44.633 – -3.61 -5.95 –
Bukowiecki et al. 2011 314.221 44.748 – – – –
van den Bergh 2006 314.104 45.47 – – – –
Dias et al. 2002 314.125 44.633 – -2.9 -8.4 –
Lynga 1987 314.111 44.634 – – – –
Sulentic et al. 1973 314.122 44.63 – – – –

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] Bfrac BSS
UCC 99999– 0.84 1.92 2.63 318 0.077 1044 – –
Hu & Soubiran 2025 – – – – -0.170(5) – – –
Zhang et al. 2024 – – – – 0.077(1) – – –
Hunt & Reffert 2024 0.84 1.98 2.63 319 – 1634(1) – –
Cavallo et al. 2024 0.87 1.88 – 575 0.370 – – –
Hunt & Reffert 2023 0.84 1.98 2.63 318 – – – –
Bukowiecki et al. 2012 – – – – – 455 – –
Bukowiecki et al. 2011 2.06(1) 3.72 – 200 – – – –
van den Bergh 2006 0.62 1.70 – 100 – – – –
Dias et al. 2002 0.76 1.64 – 347 – – – –
Lynga 1987 0.50 1.92 – – – – – –

(N): Indicates that there are N extra values assigned to this parameter 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 0.11

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

Visualization
ℹ️
NGC 6996 UCC
NGC 6996 HUNT23
Galactocentric position diagram