NGC 3960

(Melotte 108; Collinder 250; VDBH 123; MWSC 1982; OCL 861; vdBergh-Hagen 123; ESO 170 14; FSR 1590; FoF 594)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 543
Stellar density (N50/rad) 57.8 [N/pc2]
C3 classification AA
  • CN 1.0 Very 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 3960 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a massive, 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.

Note: This object contains blue stragglers according to at least one source.

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

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

Cavallo et al. (2024)
Gold sample.

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

Ahumada & Lapasset (2007)
Only the photoelectric colour-magnitude diagram of (1981AJ.....86.1210J) was examined.

Data
🔍 Search references for NGC 3960 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– 177.647 -55.676 0.417 -6.516 1.879 -22.324
Li et al. 2025 177.644 -55.679 0.4 -6.522 1.853 –
Hu & Soubiran 2025 177.643 -55.676 – – – –
Almeida et al. 2025 177.641 -55.679 – – – –
Hunt & Reffert 2024 177.65 -55.677 0.419 -6.52 1.88 -22.543
Cavallo et al. 2024 177.643 -55.676 0.419 – – –
Hunt & Reffert 2023 177.65 -55.677 0.419 -6.52 1.88 -22.543
Almeida et al. 2023 177.638 -55.678 – – – –
Angelo et al. 2023 177.646 -55.669 – -6.52 1.88 –
Just et al. 2023 177.651 -55.666 – – – –
Jadhav & Subramaniam 2021 177.644 -55.679 – – – –
Jaehnig et al. 2021 177.656 -55.676 0.435 -6.505 1.846 –
Rain et al. 2021 177.644 -55.679 0.4 -6.522 1.853 –
Dias et al. 2021 177.641 -55.679 0.404 -6.52 1.857 -21.993
Cantat-Gaudin et al. 2020 177.644 -55.679 0.4 -6.522 1.853 –
Cantat-Gaudin & Anders 2020 177.644 -55.679 0.4 -6.522 1.853 –
Liu & Pang 2019 177.643 -55.676 0.406 -6.51 1.84 –
Soubiran et al. 2018 177.644 -55.679 – – – -22.54
Bica et al. 2019 177.624 -55.674 – – – –
Cantat-Gaudin et al. 2018 177.644 -55.679 0.4 -6.522 1.853 –
Loktin & Popova 2017 177.63 -55.673 – -4.75 3.97 -22.6
Kharchenko et al. 2016 177.651 -55.666 – – – –
Dias et al. 2014 177.637 -55.673 – -4.75 3.97 –
Kharchenko et al. 2013 177.66 -55.67 – -9.88 -1.61 -22.6
Gozha et al. 2012 177.637 -55.673 – – – –
Bukowiecki et al. 2011 177.604 -55.678 – – – –
Kharchenko et al. 2007 177.63 -55.67 – 0.04 – –
Ahumada & Lapasset 2007 177.625 -55.667 – – – –
van den Bergh 2006 177.725 -55.7 – – – –
Chen et al. 2003 177.624 -55.674 – – – –
Dias et al. 2002 177.637 -55.673 – -4.75 3.97 -22.26
Lynga 1987 177.71 -55.686 – – – –
van den Bergh & Hagen 1975 177.1 -55.417 – – – –
Sulentic et al. 1973 177.712 -55.689 – – – –

💡 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– 2.26 0.95 0.64 944 0.020 1152 0.56 1
Li et al. 2025 2.49 0.97 – 856 0.154 – – –
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Almeida et al. 2025 2.07 1.07 – 955 – 1057 – –
Hunt & Reffert 2024 – – – – – 3006(1) – –
Cavallo et al. 2024 2.29 1.14 – 776 0.180 – – –
Hunt & Reffert 2023 2.20 0.84 0.64 809 – – – –
Almeida et al. 2023 2.10 1.10 – 944 0.021 1152(1) 0.56 –
Angelo et al. 2023 2.02 1.04 – 1000 0.000 6(1) – –
Just et al. 2023 – – – 1288 – 376 – –
Spina et al. 2022 – – – – -0.084 – – –
Jadhav & Subramaniam 2021 2.34 0.84 – 871 – 1857 – 1(1)
Jaehnig et al. 2021 2.29(1) – – – – – – –
Rain et al. 2021 2.33 0.91 – 1259 – – – 2
Dias et al. 2021 2.07 1.07 – 955 0.003 – – –
Cantat-Gaudin et al. 2020 2.34 0.84 – 871 – – – –
Kounkel et al. 2020 2.47 1.15 – 794 – – – –
Cantat-Gaudin & Anders 2020 2.33 – – – – – – –
Liu & Pang 2019 – – – 851 0.250 – – –
Soubiran et al. 2018 2.33 – – – – – – –
Cantat-Gaudin et al. 2018 2.33 – – – – – – –
Loktin & Popova 2017 2.26 0.95 – 664 – – – –
Kharchenko et al. 2016 1.88 0.53 – 1288 – – – –
Kharchenko et al. 2013 1.88 0.53 – 1288 0.020 – – –
Bukowiecki et al. 2012 – – – – – 2020 – –
Gozha et al. 2012 1.85 – – 1259 0.020 – – –
Bukowiecki et al. 2011 2.12(1) 0.41 – 1000 – – – –
Ahumada & Lapasset 2007 – 0.95 – 661 – – – 1
van den Bergh 2006 2.26 0.95 – 661 – – – –
Chen et al. 2003 2.26 0.95 – 660 -0.170(1) – – –
Dias et al. 2002 1.85 0.91 – 1259 0.020 – – –
Lynga 1987 1.66 – – 1000 -0.300 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 1624 4.6 177.61 -55.68 0.45 -6.48 1.89 0.52 0.0

💡 Note: The % column shows the percentage of members that NGC 3960 shares with each listed object.

Visualization
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NGC 3960 UCC
NGC 3960 HUNT23
NGC 3960 CANTAT20
Galactocentric position diagram