Kharchenko 1

(MWSC 747)

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0.75 UTI
0.39
CN
1.0
Cdens
0.75
CC3
0.81
Clit
1.0
Cdup
Nm (P>50%) 39
Core radius and density 0.6 [pc], 8.1 [pc-2]
C3 classification AB
  • CN 0.39 Poorly populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.81 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Kharchenko 1 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate 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 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 classes: 1.00 (50th percentile), true positive (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 1.00 (50th percentile), true positive (human-assigned).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.4904, e_all=0.1006.

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg46' along with Koposov 63.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

Data
🔍 Search references for Kharchenko 1 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 92.193 24.283 0.386 0.751 -2.296 40.362
Li et al. 2025 92.197 24.281 0.42 0.767 -2.286 –
Hu & Soubiran 2025 92.206 24.267 – – – –
Almeida et al. 2025 92.194 24.281 – – – –
Zhang et al. 2024 92.198 24.286 – – – –
Hunt & Reffert 2024 92.198 24.286 0.374 0.742 -2.324 40.374
Cavallo et al. 2024 92.206 24.267 0.376 – – –
Hunt & Reffert 2023 92.198 24.286 0.374 0.742 -2.324 40.374
Almeida et al. 2023 92.185 24.276 – – – –
Just et al. 2023 92.179 24.318 – – – –
Jadhav & Subramaniam 2021 92.197 24.281 – – – –
Dias et al. 2021 92.194 24.281 0.417 0.769 -2.311 41.53
Cantat-Gaudin et al. 2020 92.197 24.281 0.42 0.767 -2.286 –
Zhong et al. 2020 92.197 24.281 – 0.767 -2.286 36.273
Cantat-Gaudin & Anders 2020 92.197 24.281 0.42 0.767 -2.286 –
Soubiran et al. 2018 92.197 24.281 – – – 41.41
Bica et al. 2019 92.199 24.333 – – – –
Cantat-Gaudin et al. 2018 92.197 24.281 0.42 0.767 -2.286 –
Dias et al. 2018 – – – 2.13 -2.61 –
Loktin & Popova 2017 92.19 24.317 – 0.483 -0.866 12.7
Sampedro et al. 2017 92.2 24.332 – 0.33 -3.38 –
Kharchenko et al. 2016 92.179 24.318 – – – –
Dias et al. 2014 92.2 24.332 – 0.48 -4.0 –
Kharchenko et al. 2013 92.187 24.317 – 1.31 -3.66 12.7
Gozha et al. 2012 92.2 24.332 – – – –
van den Bergh 2006 92.2 24.332 – – – –
Dias et al. 2002 92.2 24.332 – 0.48 -4.0 12.74

💡 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– 2.39 1.09 0.36 570 -0.161 222 0.6 0
Li et al. 2025 3.51 1.26 – 530 0.259 – – –
Hu & Soubiran 2025 – – – – -0.190(5) – – –
Almeida et al. 2025 2.30 1.42 – 570 – 188 – –
Zhang et al. 2024 – – – – -0.161(1) – – –
Hunt & Reffert 2024 2.39 1.00 0.36 635 – 336(1) – –
Cavallo et al. 2024 2.34 1.09 – 676 0.420 – – –
Hunt & Reffert 2023 2.39 1.00 0.36 635 – – – –
Almeida et al. 2023 2.41 1.55 – 469 -0.186 348(1) 0.60 –
Just et al. 2023 – – – 224 – 19 – –
Jadhav & Subramaniam 2021 2.39 0.93 – 708 – 222 – 0(1)
Dias et al. 2021 2.30 1.42 – 570 -0.140 – – –
Cantat-Gaudin et al. 2020 2.39 0.93 – 708 – – – –
Kounkel et al. 2020 2.65 1.09 – 631 – – – –
Zhong et al. 2020 2.23(1) 2.30 – 8350 -0.201 – – –
Cantat-Gaudin & Anders 2020 2.23 – – – – – – –
Soubiran et al. 2018 2.23 – – – – – – –
Cantat-Gaudin et al. 2018 2.23 – – – – – – –
Loktin & Popova 2017 1.40 0.52 – 151 – – – –
Kharchenko et al. 2016 2.84 2.30 – 224 – – – –
Kharchenko et al. 2013 2.84 2.30 – 224 – – – –
Gozha et al. 2012 2.52 – – 100 – – – –
van den Bergh 2006 2.52 – – – – – – –
Dias et al. 2002 2.52 0.95 – 100 – – – –

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

Visualization
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Kharchenko 1 UCC
Kharchenko 1 HUNT23
Kharchenko 1 CANTAT20
Galactocentric position diagram