NGC 2287

(Melotte 52; Collinder 118; MWSC 978; M 41; OCL 597; ESO 557 14; FoF 2269)

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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) 1166
Stellar density (N50/rad) 55.4 [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 2287 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, below 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 age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Malhotra et al. (2026)
Lowest/Highest stellar mass in the catalogue with a mass-ratio estimate: 0.36/3.23 Msun

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=16, with probability of formation through binary evolution >=0.5 N=1.

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 24.6, 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)=8.486, Av=0.059, [Fe/H]=-0.110 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 2926942116843379968=* 12 CMa and DR2 2927012515646285440=HD 49024 as possible blue stragglers type 2. * 12 CMa it is not a member according to Cantat-Gaudin et al. (2018A&A...618A..93C, Cat. J/A+A18/A93). HD 49024 is a member located around the turnoff of the cluster; therefore, it quite easy to misclassify these star as a straggler, in our catalogue, this object is not included.

Ahumada & Lapasset (2007)
Adopted cluster centre: star 102 (1978A&AS...34..241F). Reference (1979PASP...91..636L) gives the spectra: star 109 = HD 49333, B9IV/B7IIIn(He(wk)); star 116 = HD 49024, B9IIIp(Hg-Mn). The proper motion study (1987AJ.....93..347I) gives star 116 a membership probability of 6%. Stars 109 and 116 are cited as blue stragglers in (1978A&AS...34..241F) and (1981ApJ...247..507E), respectively. Star 109 is also cited as a blue straggler in (1982A&A...109...37M), where it is given a spectrum B4p(He(wk)).

Data
🔍 Search references for NGC 2287 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 101.5 -20.716 1.357 -4.366 -1.351 23.306
Yan et al. 2026 101.495 -20.703 1.363 -4.369 -1.362 –
Malhotra et al. 2026 101.513 -20.719 – – – –
Nizovkina et al. 2025 101.495 -20.703 – – – –
Li et al. 2025 101.499 -20.716 1.36 -4.339 -1.381 –
Wei et al. 2025 101.507 -20.722 1.361 -4.374 -1.37 –
Almeida et al. 2025 101.508 -20.701 – – – –
Alfonso et al. 2024 101.499 -20.719 1.326 -4.365 -1.364 –
Hunt & Reffert 2024 101.495 -20.703 1.363 -4.369 -1.362 22.952
Cavallo et al. 2024 101.506 -20.708 1.361 – – –
Hunt & Reffert 2023 101.495 -20.703 1.363 -4.369 -1.362 22.952
Almeida et al. 2023 101.559 -20.693 – – – –
Angelo et al. 2023 101.475 -20.724 – -4.37 -1.36 –
Cordoni et al. 2023 101.508 -20.701 1.354 -4.335 -1.389 –
Just et al. 2023 101.506 -20.743 – – – –
He et al. 2022 101.505 -20.725 1.359 -4.365 -1.358 –
Tarricq et al. 2022 101.509 -20.728 1.352 -4.366 -1.363 –
Jaehnig et al. 2021 101.502 -20.726 1.399 -4.353 -1.391 –
Rain et al. 2021 101.499 -20.716 1.36 -4.339 -1.381 –
Richer et al. 2021 101.495 -20.705 1.356 -4.333 -1.357 –
Dias et al. 2021 101.508 -20.701 1.354 -4.335 -1.389 24.396
Cantat-Gaudin et al. 2020 101.499 -20.716 1.36 -4.339 -1.381 –
Cantat-Gaudin & Anders 2020 101.499 -20.716 1.36 -4.339 -1.381 –
Liu & Pang 2019 101.51 -20.696 1.358 -4.348 -1.381 –
Bossini et al. 2019 101.499 -20.716 – – – –
Soubiran et al. 2018 101.499 -20.716 – – – 23.52
Bica et al. 2019 101.48 -20.768 – – – –
Cantat-Gaudin et al. 2018 101.499 -20.716 1.36 -4.339 -1.381 –
Loktin & Popova 2017 101.505 -20.757 – -0.062 0.089 24.5
Kharchenko et al. 2016 101.506 -20.743 – – – –
Dias et al. 2014 101.504 -20.757 – -0.84 -0.56 –
Kharchenko et al. 2013 101.512 -20.745 – -3.33 -0.75 24.5
Gozha et al. 2012 101.504 -20.757 – – – –
Piskunov et al. 2008 101.499 -20.759 – – – –
Kharchenko et al. 2007 101.5 -20.76 – 0.5 – 24.47
Piskunov et al. 2007 101.499 -20.759 – – – –
Ahumada & Lapasset 2007 101.5 -20.75 – – – –
van den Bergh 2006 101.5 -20.767 – – – –
Kharchenko et al. 2005 101.5 -20.76 – -4.57 -0.67 23.3
Kharchenko et al. 2003 101.52 -20.71 – -4.49 -0.57 –
Chen et al. 2003 101.641 -20.735 – -4.34 -0.09 25.8
Dias et al. 2002 101.504 -20.757 – -0.84 -0.56 23.3
Lynga 1987 101.748 -20.737 – – – 33.0
Sulentic et al. 1973 101.769 -20.761 – – – –

💡 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– 0.7 0.09 0.45 226 -0.078 834 0.35 0
Yan et al. 2026 – – – 169 – – – –
Malhotra et al. 2026 0.74 0.20 – 206 -0.130 – – –
Nizovkina et al. 2025 0.73(4) 0.27(4) – 156(4) -0.131(4) – – –
Li et al. 2025 0.68 0.14 – 301 -0.141 – – –
Wei et al. 2025 0.74 0.12 – 98 0.250 1101 0.35 –
Almeida et al. 2025 0.70 0.17 – 302 – 1256 – –
Alfonso et al. 2024 0.69 0.02 – 403 -0.099 – – –
Hunt & Reffert 2024 – – – – – 1668(1) – –
Cavallo et al. 2024 0.73 0.07 – 229 0.320 – – –
Hunt & Reffert 2023 0.70 0.09 0.45 155 – – – –
Almeida et al. 2023 0.71 0.23 – 198 -0.078 1126(1) 0.43 –
Angelo et al. 2023 0.66 0.19 – 224 0.000 2(1) – –
Cordoni et al. 2023 0.71 0.17 – 302 -0.100 1282 0.25 0(1)
Just et al. 2023 – – – 178 – 127 – –
He et al. 2022 – 0.25 – 112 – – – –
Tarricq et al. 2022 0.68 – – 178 – – – –
Jaehnig et al. 2021 0.71(1) – – – – – – –
Rain et al. 2021 0.72 0.03 – 302 – – – 0
Richer et al. 2021 – 0.09 – 170 – – – –
Dias et al. 2021 0.70 0.17 – 302 -0.100 – – –
Cantat-Gaudin et al. 2020 0.69 0.02 – 170 – – – –
Kounkel et al. 2020 0.68 0.27 – 123 – – – –
Cantat-Gaudin & Anders 2020 0.72 – – – – – – –
Liu & Pang 2019 – – – 98 0.250 – – –
Bossini et al. 2019 0.66 0.06 – 306 -0.110 – – –
Soubiran et al. 2018 0.72 – – – – – – –
Cantat-Gaudin et al. 2018 0.72 – – – – – – –
Loktin & Popova 2017 0.70 0.09 – 244 – – – –
Kharchenko et al. 2016 0.77 0.20 – 178 – – – –
Kharchenko et al. 2013 0.77 0.20 – 178 0.040 – – –
Gozha et al. 2012 0.71 – – 251 -0.060 324 – –
Piskunov et al. 2008 0.69 0.09 – 282 – 568(1) – –
Piskunov et al. 2007 0.69 0.09 – 282 – 206 – –
Ahumada & Lapasset 2007 – 0.09 – 245 – – – 2
van den Bergh 2006 0.69 0.09 – 240 – – – –
Kharchenko et al. 2005 0.69 0.09 – 282 – – – –
Kharchenko et al. 2003 0.69 0.09 – – – – – –
Chen et al. 2003 0.69 0.09 – 240 0.040(1) – – –
Dias et al. 2002 0.71 0.03 – 251 -0.230 – – –
Lynga 1987 0.74 0.00 – 100 0.090 – – –

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

Visualization
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NGC 2287 UCC
NGC 2287 HUNT23
NGC 2287 CANTAT20
Galactocentric position diagram