NGC 2243

(Melotte 46; Collinder 98; MWSC 880; OCL 644; ESO 426 16; FSR 1296; FoF 3)

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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) 1336
Stellar density (N50/rad) 50.7 [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 2243 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the absorption, age, 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.

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

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

Rain et al. (2024)
This cluster hosts only a few BSSs. Those offset from the ZAMS are consistent with binary evolution, with some appearing as evolved binaries, though not yet classified as YSSs.

Rain et al. (2021)
Best fit with log(t)=9.5

Data
🔍 Search references for NGC 2243 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 97.393 -31.283 0.227 -1.263 5.5 60.162
Otto et al. 2026 97.396 -31.283 – -1.28 5.49 59.9
Li et al. 2025 97.395 -31.282 0.211 -1.279 5.488 –
Guerco et al. 2025 97.4 -31.3 0.22 -1.24 5.5 60.0
Hu & Soubiran 2025 97.39 -31.281 – – – –
Carrasco-Varela et al. 2025 97.539 -31.317 – – – –
Almeida et al. 2025 97.392 -31.283 – – – –
Hunt & Reffert 2024 97.396 -31.283 0.223 -1.267 5.494 59.993
Cavallo et al. 2024 97.39 -31.281 0.221 – – –
Rain et al. 2024 97.393 -31.284 0.222 -1.263 5.493 –
Hunt & Reffert 2023 97.396 -31.283 0.223 -1.267 5.494 59.993
Angelo et al. 2023 97.383 -31.285 – -1.26 5.5 –
Just et al. 2023 97.387 -31.284 – – – –
Jadhav & Subramaniam 2021 97.395 -31.282 – – – –
Jaehnig et al. 2021 97.396 -31.284 0.241 -1.287 5.498 –
Rain et al. 2021 97.395 -31.282 0.211 -1.279 5.488 –
Dias et al. 2021 97.392 -31.283 0.217 -1.282 5.489 59.611
Spina et al. 2021 97.394 -31.282 0.216 -1.285 5.494 –
Cantat-Gaudin et al. 2020 97.395 -31.282 0.211 -1.279 5.488 –
Donor et al. 2020 97.392 -31.285 – -1.28 5.5 59.8
Cantat-Gaudin & Anders 2020 97.395 -31.282 0.211 -1.279 5.488 –
Liu & Pang 2019 97.385 -31.279 0.257 -1.261 5.493 –
Soubiran et al. 2018 97.395 -31.282 – – – 59.63
Bica et al. 2019 97.397 -31.283 – – – –
Cantat-Gaudin et al. 2018 97.395 -31.282 0.211 -1.279 5.488 –
Loktin & Popova 2017 97.395 -31.282 – -0.49 4.02 55.0
Kharchenko et al. 2016 97.387 -31.284 – – – –
Dias et al. 2014 97.392 -31.283 – -0.48 4.02 –
Kharchenko et al. 2013 97.392 -31.285 – -2.81 4.09 55.0
Gozha et al. 2012 97.392 -31.283 – – – –
Bukowiecki et al. 2011 97.388 -31.278 – – – –
Kharchenko et al. 2007 97.39 -31.28 – 0.04 – –
Ahumada & Lapasset 2007 97.4 -31.283 – – – –
van den Bergh 2006 97.392 -31.283 – – – –
Chen et al. 2003 97.449 -31.287 – – – –
Dias et al. 2002 97.392 -31.283 – -0.49 4.02 59.84
Lynga 1987 97.449 -31.287 – – – –
Sulentic et al. 1973 97.437 -31.284 – – – –

💡 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– 4.17 0.16 0.35 3136 -0.460 4401 0.16 8
Otto et al. 2026 – – – 4365 -0.460(15) – – –
Li et al. 2025 4.03 0.24 – 3136 -0.386 – – –
Guerco et al. 2025 – – – 4370 -0.480 – – –
Hu & Soubiran 2025 – – – – -0.380(5) – – –
Carrasco-Varela et al. 2025 4.00 0.27 – 3443 -0.450 – – 6(1)
Almeida et al. 2025 4.00 0.27 – 3443 – 3681 – –
Hunt & Reffert 2024 – – – – – 5121(1) – –
Cavallo et al. 2024 2.91 0.67 – 3890 -0.940 – – –
Rain et al. 2024 4.08 0.00 – 3426 – 9279 0.16 –
Hunt & Reffert 2023 3.95 0.03 0.35 2748 – – – –
Angelo et al. 2023 3.80 0.32 – 3548 -0.470 13(1) – –
Just et al. 2023 – – – 1365 – 1832 – –
Spina et al. 2022 – – – – -0.460 – – –
Jadhav & Subramaniam 2021 3.72 0.02 – 4365 – 7576 – 8(1)
Jaehnig et al. 2021 4.29(1) – – – – – – –
Rain et al. 2021 4.17 0.16 – 1072 – – – 14
Dias et al. 2021 4.00 0.27 – 3443 -0.482 – – –
Spina et al. 2021 4.34 – – 4365 -0.472(20) – – –
Cantat-Gaudin et al. 2020 3.72 0.02 – 4365 – – – –
Kounkel et al. 2020 4.51 0.35 – 1698 – – – –
Donor et al. 2020 – – – – -0.460 – – –
Cantat-Gaudin & Anders 2020 4.17 – – – – – – –
Liu & Pang 2019 – – – 3390 0.000 – – –
Soubiran et al. 2018 4.17 – – – – – – –
Cantat-Gaudin et al. 2018 4.17 – – – – – – –
Loktin & Popova 2017 4.88 0.19 – 1076 – – – –
Kharchenko et al. 2016 4.45 0.20 – 1365 – – – –
Kharchenko et al. 2013 4.45 0.20 – 1365 -0.490 – – –
Gozha et al. 2012 4.46 – – 1076 -0.490 – – –
Bukowiecki et al. 2011 4.45(1) 0.00 – 1413 – – – –
Ahumada & Lapasset 2007 – 0.16 – 1072 – – – 9
van den Bergh 2006 4.46 0.16 – 1072 – – – –
Chen et al. 2003 4.46 0.16 – 1070 -0.440(1) – – –
Dias et al. 2002 4.46 0.16 – 1076 -0.420 – – –
Lynga 1987 3.58 0.00 – 6026 -0.550 – – –

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

Visualization
ℹī¸
NGC 2243 UCC
NGC 2243 HUNT23
NGC 2243 CANTAT20
Galactocentric position diagram