NGC 5617

(Melotte 125; Collinder 282; VDBH 159; MWSC 2223; OCL 919; vdBergh-Hagen 159; ESO 134 04)

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0.98 UTI
0.9
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 492
Stellar density (N50/rad) 50.0 [N/pc2]
C3 classification AA
  • CN 0.9 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 5617 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate 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 absorption and mass parameters (see Parameters). It is very well-studied in the literature.

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

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 261 along with Hogg_17, and as tidal capture (resonant trapping binary) 289 along with UBC_1527, and of multiple system 73 along with UBC_1527 and Hogg_17.

Palma et al. (2025)
Part of multiple system G218, along with UBC_1527 and HSC_2655.

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

Cavallo et al. (2024)
Gold sample.

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

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=8.140, Av=1.592, [Fe/H]=-0.180 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108).

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg45' along with Hogg 17, Pismis 19 and Trumpler 22.

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: one or a few submm emission within the cluster area.

Ahumada & Lapasset (2007)
All cluster data except the apparent diameter are from (2005AN....326....3A).

Data
🔍 Search references for NGC 5617 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– 217.452 -60.718 0.417 -5.681 -3.177 -35.883
Liu et al. 2025 217.44 -60.71 0.42 -5.68 -3.18 -37.29
Li et al. 2025 217.452 -60.719 0.4 -5.641 -3.172 –
Wei et al. 2025 217.453 -60.722 0.417 -5.682 -3.16 –
Almeida et al. 2025 217.45 -60.72 – – – –
Hunt & Reffert 2024 217.441 -60.712 0.421 -5.682 -3.177 -37.293
Cavallo et al. 2024 217.451 -60.72 0.422 – – –
Hunt & Reffert 2023 217.441 -60.712 0.421 -5.682 -3.177 -37.293
Cordoni et al. 2023 217.45 -60.72 0.401 -5.641 -3.171 –
Just et al. 2023 217.435 -60.712 – – – –
Jaehnig et al. 2021 217.453 -60.714 0.432 -5.645 -3.157 –
Rain et al. 2021 217.452 -60.719 0.4 -5.641 -3.172 –
Dias et al. 2021 217.45 -60.72 0.401 -5.641 -3.171 -35.135
Cantat-Gaudin et al. 2020 217.452 -60.719 0.4 -5.641 -3.172 –
Cantat-Gaudin & Anders 2020 217.452 -60.719 0.4 -5.641 -3.172 –
Bossini et al. 2019 217.452 -60.719 – – – –
Soubiran et al. 2018 217.452 -60.719 – – – -34.74
Bica et al. 2019 217.414 -60.716 – – – –
Cantat-Gaudin et al. 2018 217.452 -60.719 0.4 -5.641 -3.172 –
Loktin & Popova 2017 217.44 -60.713 – -1.794 -6.146 -35.8
Kharchenko et al. 2016 217.435 -60.712 – – – –
Dias et al. 2014 217.433 -60.712 – -4.36 -5.39 –
Kharchenko et al. 2013 217.447 -60.715 – -2.9 -3.0 -35.8
Morales et al. 2013 217.433 -60.712 – – – –
Gozha et al. 2012 217.433 -60.712 – – – –
Bukowiecki et al. 2011 217.446 -60.728 – – – –
Piskunov et al. 2008 217.433 -60.712 – – – –
Ahumada & Lapasset 2007 217.45 -60.717 – – – –
van den Bergh 2006 217.45 -60.717 – – – –
Kharchenko et al. 2005 217.44 -60.71 – -1.77 -3.65 –
Dias et al. 2002 217.433 -60.712 – -4.36 -5.39 -38.63
Dambis 1999 217.433 -60.712 – – – –
Lynga 1987 217.433 -60.712 – – – –
van den Bergh & Hagen 1975 216.5 -60.5 – – – –
Sulentic et al. 1973 217.445 -60.727 – – – –

💡 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– 2.0 1.59 0.93 111 0.064 1825 0.46 0
Liu et al. 2025 4.04 0.60 – 115 – – – –
Li et al. 2025 1.95 1.60 – 234 0.055 – – –
Wei et al. 2025 5.17 2.32 – 65 0.250 1825 0.33 –
Almeida et al. 2025 1.98 1.74 – 111 – 2853 – –
Hunt & Reffert 2024 – – – – – 2542(1) – –
Cavallo et al. 2024 2.00 1.75 – 200 0.100 – – –
Hunt & Reffert 2023 2.18 1.66 0.93 66 – – – –
Cordoni et al. 2023 1.98 1.74 – 111 0.064 7773 0.59 0(1)
Just et al. 2023 – – – 178 – 299 – –
Jaehnig et al. 2021 2.30(1) – – – – – – –
Rain et al. 2021 2.33 1.61 – 138 – – – 0
Dias et al. 2021 1.98 1.74 – 111 0.064 – – –
Cantat-Gaudin et al. 2020 2.24 1.55 – 105 – – – –
Kounkel et al. 2020 2.37 1.69 – 117 – – – –
Cantat-Gaudin & Anders 2020 2.33 – – – – – – –
Bossini et al. 2019 2.14 1.59 – 138 -0.180 – – –
Soubiran et al. 2018 2.33 – – – – – – –
Cantat-Gaudin et al. 2018 2.33 – – – – – – –
Loktin & Popova 2017 1.54 1.52 – 84 – – – –
Kharchenko et al. 2016 1.77 1.58 – 178 – – – –
Kharchenko et al. 2013 1.77 1.58 – 178 – – – –
Morales et al. 2013 2.00 – – 80 – – – –
Bukowiecki et al. 2012 – – – – – 385 – –
Gozha et al. 2012 2.00 – – 79 0.100 537 – –
Bukowiecki et al. 2011 2.02(1) 1.36 – 112 – – – –
Piskunov et al. 2008 1.53 1.51 – 105 – – – –
Ahumada & Lapasset 2007 – 1.70 – 141 – – – 0
van den Bergh 2006 1.53 1.51 – 83 – – – –
Kharchenko et al. 2005 1.53 1.51 – 105 – – – –
Dias et al. 2002 2.00 1.51 – 79 -0.180 – – –
Dambis 1999 1.32 1.67 – 32 – – – –
Lynga 1987 1.20 1.55 – 46 -0.510 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0609 6.5 217.42 -60.72 0.46 -5.71 -3.23 -35.54 0.06

💡 Note: The % column shows the percentage of members that NGC 5617 shares with each listed object.

Visualization
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NGC 5617 UCC
NGC 5617 HUNT23
NGC 5617 CANTAT20
Galactocentric position diagram