NGC 6709

(Melotte 214; Collinder 392; MWSC 3009; OCL 100; FoF 2193)

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0.97 UTI
0.87
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 426
Stellar density (N50/rad) 44.4 [N/pc2]
C3 classification AA
  • CN 0.87 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
NGC 6709 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Richer et al. (2021)
The expected number of WDs is 12.3, 0 WD candidates found, and 0 WD candidates found in the wide search.

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=8.239, Av=0.814, [Fe/H]=0.00 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108). Ahumada & Lapasset (2007A&A...463..789A, Cat. J/A+A/463/789) cite stars DR2 4311560408276862080=NGC 6709 11 and DR2 4311607652919937920=Cl* NGC 6709 SS B3 as possible stragglers. Both are members according to Cantat-Gaudin et al. (2018A&A...618A..93C, Cat. J/A+A18/A93) however, both appear in the main sequence and not in the region of the stragglers in the CMD.

Ahumada & Lapasset (2007)
Stars 235 and 293 appear on the main sequence rather than in the straggler area according to the photoelectric data (1961PUSNO..17..343H). How- wever, when the photographic data of the same reference are plotted, stars 298, 301, and 335 appear as stragglers. Member- ship probabilities by (1983A&AS...51..541H): star 235, 67%; star 293, 40%. Star 277 also appears as a straggler in (1999AJ....117..937S), but it is not a cluster member according to (1983A&AS...51..541H).

Data
🔍 Search references for NGC 6709 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 282.843 10.33 0.92 1.444 -3.534 -12.766
Li et al. 2025 282.836 10.334 0.911 1.414 -3.532 –
Wei et al. 2025 282.846 10.334 0.926 1.439 -3.534 –
Almeida et al. 2025 282.838 10.342 – – – –
Hunt & Reffert 2024 282.834 10.323 0.924 1.445 -3.539 -10.721
Cavallo et al. 2024 282.843 10.341 0.923 – – –
Hunt & Reffert 2023 282.834 10.323 0.924 1.445 -3.539 -10.721
Almeida et al. 2023 282.839 10.344 – – – –
Cordoni et al. 2023 282.838 10.342 0.913 1.408 -3.536 –
Just et al. 2023 282.839 10.329 – – – –
He et al. 2022 282.834 10.329 0.925 1.45 -3.528 –
Tarricq et al. 2022 282.843 10.317 0.899 1.459 -3.527 –
Jaehnig et al. 2021 282.825 10.323 0.949 1.433 -3.514 –
Rain et al. 2021 282.836 10.334 0.911 1.414 -3.532 –
Richer et al. 2021 282.828 10.319 0.92 1.398 -3.514 –
Dias et al. 2021 282.838 10.342 0.913 1.408 -3.536 -10.072
Cantat-Gaudin et al. 2020 282.836 10.334 0.911 1.414 -3.532 –
Cantat-Gaudin & Anders 2020 282.836 10.334 0.911 1.414 -3.532 –
Liu & Pang 2019 282.83 10.338 0.916 1.424 -3.516 –
Bossini et al. 2019 282.836 10.334 – – – –
Soubiran et al. 2018 282.836 10.334 – – – -10.21
Bica et al. 2019 282.829 10.316 – – – –
Cantat-Gaudin et al. 2018 282.836 10.334 0.911 1.414 -3.532 –
Loktin & Popova 2017 282.825 10.318 – -1.421 -4.188 -12.8
Kharchenko et al. 2016 282.839 10.329 – – – –
Dias et al. 2014 282.825 10.318 – -0.17 -2.62 –
Kharchenko et al. 2013 282.846 10.33 – 1.75 -3.0 -12.8
Gozha et al. 2012 282.825 10.318 – – – –
Piskunov et al. 2008 282.82 10.32 – – – –
Kharchenko et al. 2007 282.82 10.32 – 0.22 – -7.0
Piskunov et al. 2007 282.82 10.32 – – – –
Ahumada & Lapasset 2007 282.825 10.317 – – – –
van den Bergh 2006 282.825 10.317 – – – –
Kharchenko et al. 2005 282.82 10.32 – 2.55 -3.51 -7.0
Kharchenko et al. 2003 282.82 10.33 – 1.8 -3.41 –
Chen et al. 2003 282.875 10.382 – 2.61 -3.07 -21.0
Dias et al. 2002 282.825 10.318 – -0.17 -2.62 -10.22
Dambis 1999 282.825 10.318 – – – –
Lynga 1987 282.857 10.347 – – – -13.0
Sulentic et al. 1973 282.871 10.347 – – – –

💡 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– 1.065 0.965 0.89 156 0.143 679 0.5 0
Li et al. 2025 1.08 0.79 – 305 0.250 – – –
Wei et al. 2025 1.65 1.08 – 275 0.250 765 0.65 –
Almeida et al. 2025 1.03 1.04 – 161 – 788 – –
Hunt & Reffert 2024 – – – – – 1330(1) – –
Cavallo et al. 2024 1.08 0.89 – 275 0.350 – – –
Hunt & Reffert 2023 1.03 0.84 0.89 161 – – – –
Almeida et al. 2023 1.04 1.08 – 157 0.047 679(1) 0.50 –
Cordoni et al. 2023 1.03 1.04 – 161 0.143 1087 0.41 0(1)
Just et al. 2023 – – – 141 – 210 – –
He et al. 2022 – 1.15 – 141 – – – –
Spina et al. 2022 – – – – -0.050 – – –
Tarricq et al. 2022 1.02 – – 204 – – – –
Jaehnig et al. 2021 1.06(1) – – – – – – –
Rain et al. 2021 1.06 0.82 – 170 – – – 0
Richer et al. 2021 – 0.97 – 191 – – – –
Dias et al. 2021 1.03 1.04 – 161 0.143 – – –
Cantat-Gaudin et al. 2020 1.04 0.72 – 191 – – – –
Kounkel et al. 2020 1.06 0.97 – 174 – – – –
Cantat-Gaudin & Anders 2020 1.06 – – – – – – –
Liu & Pang 2019 – – – 204 -0.250 – – –
Bossini et al. 2019 1.09 0.81 – 173 0.000 – – –
Soubiran et al. 2018 1.06 – – – – – – –
Cantat-Gaudin et al. 2018 1.06 – – – – – – –
Loktin & Popova 2017 1.08 0.94 – 155 – – – –
Kharchenko et al. 2016 1.07 0.89 – 141 – – – –
Kharchenko et al. 2013 1.07 0.89 – 141 – – – –
Gozha et al. 2012 1.07 – – 151 – 200 – –
Piskunov et al. 2008 1.07 1.01 – 138 – 319(1) – –
Piskunov et al. 2007 1.07 1.01 – 138 – 96 – –
Ahumada & Lapasset 2007 – 0.95 – 155 – – – 2
van den Bergh 2006 1.07 0.95 – 151 – – – –
Kharchenko et al. 2005 1.07 1.01 – 138 – – – –
Kharchenko et al. 2003 1.07 0.95 – – – – – –
Chen et al. 2003 1.07 – – 150 – – – –
Dias et al. 2002 1.07 0.96 – 151 – – – –
Dambis 1999 0.82 1.10 – 126 – – – –
Lynga 1987 0.95 1.01 – 78 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
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NGC 6709 UCC
NGC 6709 HUNT23
NGC 6709 CANTAT20
Galactocentric position diagram