NGC 1528

(Melotte 23; Collinder 47; MWSC 353; OCL 397; FoF 2138)

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0.97 UTI
0.87
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 419
Core radius and density 1.3 [pc], 12 [pc-2]
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
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 1528 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near 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).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Richer et al. (2021)
The expected number of WDs is 35.1, 0 WD candidates found, and 0 WD candidates found in the wide search.

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1775, e_all=0.247.

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=8.596, Av=0.794, [Fe/H]=0.00 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108). The distance d=928.8 (dmode+01) of Cantat-Gaudin et al. (2018A&A...618A..93C, Cat. J/A+A18/A93) was use to fit the isochrone. Ahumada & Lapasset (2007A&A...463..789A, Cat. J/A+A/463/789) cite stars DR2 271672353816125696=HD 26603 and DR2 271765125108457856=HD 26775 as blue stragglers candidates, however both are not a proper-motion members.

Ahumada & Lapasset (2007)
Diagrams in (1989AJ.....98..888F) were also examined. References (1985ApJ...294L.103A) and (1982A&A...109...37M) cite star 1 (WEBDA)=HD 26603 as a blue straggler, but in (1989AJ.....98..888F) it is assigned a membership probability of 0% according to its proper motion. Star 209 (WEBDA) also appears as a straggler in (1989AJ.....98..888F), but it is not a proper-motion member.

Data
πŸ” Search references for NGC 1528 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 63.877 51.21 0.966 2.138 -2.278 -12.626
Li et al. 2025 63.878 51.218 0.948 2.181 -2.246 –
Yang et al. 2025 63.906 51.195 – – – –
Almeida et al. 2025 63.862 51.229 – – – –
Zhang et al. 2024 63.906 51.195 – – – –
Hunt & Reffert 2024 63.906 51.195 0.964 2.149 -2.304 -12.024
Cavallo et al. 2024 63.836 51.233 0.967 – – –
Hunt & Reffert 2023 63.906 51.195 0.964 2.149 -2.304 -12.024
Almeida et al. 2023 63.853 51.242 – – – –
Cordoni et al. 2023 63.862 51.229 0.945 2.182 -2.25 –
Just et al. 2023 63.836 51.19 – – – –
He et al. 2022 63.859 51.219 0.972 2.128 -2.298 –
Tarricq et al. 2022 63.89 51.221 0.986 2.133 -2.273 –
Jaehnig et al. 2021 63.867 51.211 0.984 2.18 -2.218 –
Rain et al. 2021 63.878 51.218 0.948 2.181 -2.246 –
Richer et al. 2021 63.888 51.213 0.95 2.165 -2.232 –
Dias et al. 2021 63.862 51.229 0.945 2.182 -2.25 -9.533
Cantat-Gaudin et al. 2020 63.878 51.218 0.948 2.181 -2.246 –
SΓ‘nchez et al. 2020 63.846 51.215 – 2.227 -2.174 –
Zhong et al. 2020 63.878 51.218 – 2.181 -2.246 -15.772
Cantat-Gaudin & Anders 2020 63.878 51.218 0.948 2.181 -2.246 –
Liu & Pang 2019 63.874 51.216 0.958 2.161 -2.232 –
Bossini et al. 2019 63.878 51.218 – – – –
Soubiran et al. 2018 63.878 51.218 – – – -9.62
Bica et al. 2019 63.852 51.229 – – – –
Cantat-Gaudin et al. 2018 63.878 51.218 0.948 2.181 -2.246 –
Dias et al. 2018 – – – 1.88 -1.85 –
Dib et al. 2018 63.847 51.19 – – – –
Loktin & Popova 2017 63.84 51.216 – -2.074 1.13 -9.2
Sampedro et al. 2017 63.846 51.215 – 0.46 -0.61 –
Joshi et al. 2016 63.847 51.19 – – – –
Kharchenko et al. 2016 63.836 51.19 – – – –
Dias et al. 2014 63.846 51.215 – 0.9 -1.08 –
Kharchenko et al. 2013 63.847 51.19 – 1.2 -1.38 -9.2
Gozha et al. 2012 63.846 51.215 – – – –
Kharchenko et al. 2012 63.847 51.19 – 1.2 -1.38 -9.15
Bukowiecki et al. 2011 63.875 51.196 – – – –
Piskunov et al. 2008 63.829 51.214 – – – –
Kharchenko et al. 2007 63.84 51.22 – 0.44 – -10.3
Piskunov et al. 2007 63.829 51.214 – – – –
Ahumada & Lapasset 2007 63.85 51.217 – – – –
van den Bergh 2006 63.85 51.217 – – – –
Kharchenko et al. 2005 63.84 51.22 – 1.67 -2.46 –
Kharchenko et al. 2003 63.85 51.2 – 2.02 -1.39 –
Chen et al. 2003 63.827 51.285 – 1.81 -2.44 -10.3
Dias et al. 2002 63.846 51.215 – 0.9 -1.08 -16.9
Lynga 1987 63.84 51.235 – – – –
Sulentic et al. 1973 63.85 51.245 – – – –

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– 0.97 0.82 1.02 355 -0.043 563 0.38 0
Li et al. 2025 0.94 0.90 – 470 -0.043 – – –
Yang et al. 2025 – – – 209 -0.110(3) – – –
Almeida et al. 2025 0.97 1.00 – 385 – 892 – –
Zhang et al. 2024 – – – – -0.131(1) – – –
Hunt & Reffert 2024 0.98 0.92 1.02 209 – 1346(1) – –
Cavallo et al. 2024 1.05 0.90 – 437 0.460 – – –
Hunt & Reffert 2023 0.98 0.92 1.02 209 – – – –
Almeida et al. 2023 0.99 1.15 – 347 0.007 925(1) 0.46 –
Cordoni et al. 2023 0.97 1.00 – 385 0.117 1075 0.30 0(1)
Just et al. 2023 – – – 355 – 184 – –
He et al. 2022 – 1.20 – 251 – – – –
Tarricq et al. 2022 1.04 – – 309 – – – –
Jaehnig et al. 2021 1.01(1) – – – – – – –
Rain et al. 2021 1.02 0.79 – 389 – – – 0
Richer et al. 2021 – 1.00 – 295 – – – –
Dias et al. 2021 0.97 1.00 – 385 0.117 – – –
Cantat-Gaudin et al. 2020 1.07 0.82 – 295 – – – –
Kounkel et al. 2020 0.99 1.06 – 380 – – – –
Zhong et al. 2020 1.02(1) 0.81 – 8596 -0.191 – – –
Cantat-Gaudin & Anders 2020 1.02 – – – – – – –
Liu & Pang 2019 – – – 288 0.250 – – –
Bossini et al. 2019 0.99 0.79 – 394 0.000 – – –
Soubiran et al. 2018 1.02 – – – – – – –
Cantat-Gaudin et al. 2018 1.02 – – – – – – –
Dib et al. 2018 0.95 – – 355 – – – –
Loktin & Popova 2017 0.80 0.84 – 344 – – – –
Joshi et al. 2016 0.95 0.79 – 355 – 479 – –
Kharchenko et al. 2016 0.95 0.79 – 355 – – – –
Kharchenko et al. 2013 0.95 0.79 – 355 – – – –
Bukowiecki et al. 2012 – – – – – 179 – –
Gozha et al. 2012 1.09 – – 398 -0.130 479 – –
Kharchenko et al. 2012 0.95 0.79 – 355 – – – –
Bukowiecki et al. 2011 0.75(1) 0.66 – 447 – – – –
Paunzen et al. 2010 – – – – -0.130 – – –
Piskunov et al. 2008 0.78 0.76 – 269 – 647(1) – –
Piskunov et al. 2007 0.78 0.76 – 269 – 239 – –
Ahumada & Lapasset 2007 – 0.82 – 372 – – – 0
van den Bergh 2006 0.78 0.82 – 372 – – – –
Kharchenko et al. 2005 0.78 0.76 – 269 – – – –
Kharchenko et al. 2003 0.78 0.82 – – – – – –
Chen et al. 2003 0.78 – – 360 – – – –
Dias et al. 2002 1.09 0.82 – 398 – – – –
Lynga 1987 0.80 0.91 – 269 -0.100 – – –

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

Visualization
ℹ️
NGC 1528 UCC
NGC 1528 HUNT23
NGC 1528 CANTAT20
Galactocentric position diagram