IC 1805

(MWSC 209)

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0.91 UTI
0.79
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 209
Stellar density (N50/rad) 26.5 [N/pc2]
C3 classification AB
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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¸
IC 1805 is a rich, 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, very young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with 2 later reported entries. See table with shared members information.

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for IC 1805 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 38.197 61.47 0.455 -0.729 -0.717 -38.438
Almeida et al. 2025 38.255 61.484 – – – –
Hunt & Reffert 2024 38.194 61.47 0.449 -0.716 -0.591 -9.639
Celli et al. 2024 38.21 61.471 – – – –
Cavallo et al. 2024 38.303 61.565 0.456 – – –
Hunt & Reffert 2023 38.194 61.47 0.449 -0.716 -0.591 -9.639
Just et al. 2023 38.17 61.453 – – – –
Jaehnig et al. 2021 38.211 61.494 0.48 -0.751 -0.446 –
Rain et al. 2021 38.21 61.471 0.449 -0.702 -0.669 –
Dias et al. 2021 38.255 61.484 0.445 -0.704 -0.71 –
Cantat-Gaudin et al. 2020 38.21 61.471 0.449 -0.702 -0.669 –
Cantat-Gaudin & Anders 2020 38.21 61.471 0.449 -0.702 -0.669 –
Dias et al. 2019 38.208 61.638 0.449 -0.702 -0.669 -40.93
Soubiran et al. 2018 38.21 61.471 – – – -42.39
Cantat-Gaudin et al. 2018 38.21 61.471 0.449 -0.702 -0.669 –
Loktin & Popova 2017 38.175 61.451 – -1.613 -2.383 -48.5
Kharchenko et al. 2016 38.17 61.453 – – – –
Dias et al. 2014 38.175 61.45 – -1.49 -2.24 –
Kharchenko et al. 2013 38.182 61.455 – -1.4 -2.23 -48.5
Gozha et al. 2012 38.175 61.45 – – – –
Kharchenko et al. 2012 38.182 61.455 – -1.65 -2.11 -48.5
Piskunov et al. 2008 38.157 61.444 – – – –
Kharchenko et al. 2007 38.17 61.45 – 0.22 – -47.88
Piskunov et al. 2007 38.157 61.444 – – – –
van den Bergh 2006 38.175 61.45 – – – –
Kharchenko et al. 2005 38.17 61.45 – -1.34 -1.15 -47.64
Kharchenko et al. 2003 38.17 61.47 – -1.36 -0.12 –
Chen et al. 2003 38.19 61.535 – -1.1 -1.92 -26.0
Dias et al. 2002 38.175 61.45 – -2.1 -1.57 -45.0
Dambis 1999 38.175 61.45 – – – –

💡 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– 1.95 2.4 2.46 7 0.151 891 – 0.0
Almeida et al. 2025 2.19 2.33 – 7 – 814 – –
Hunt & Reffert 2024 – – – – – 1637(1) – –
Celli et al. 2024 – – – 8 – 891 – –
Cavallo et al. 2024 1.65 2.41 – 9 -0.060 – – –
Hunt & Reffert 2023 2.02 2.40 2.46 4 – – – –
Just et al. 2023 – – – 18 – 546 – –
Jaehnig et al. 2021 2.08(1) – – – – – – –
Rain et al. 2021 2.09 2.70 – 3 – – – 0
Dias et al. 2021 2.19 2.33 – 7 0.310 – – –
Cantat-Gaudin et al. 2020 1.97 2.22 – 8 – – – –
Cantat-Gaudin & Anders 2020 2.09 – – – – – – –
Dias et al. 2019 2.16 2.26 – 8 0.223 – – –
Soubiran et al. 2018 2.09 – – – – – – –
Cantat-Gaudin et al. 2018 2.09 – – – – – – –
Loktin & Popova 2017 1.86 2.52 – 7 – – – –
Kharchenko et al. 2016 1.70 2.48 – 18 – – – –
Kharchenko et al. 2013 1.70 2.48 – 18 – – – –
Gozha et al. 2012 2.34 – – 3 0.080 2291 – –
Kharchenko et al. 2012 1.70 2.48 – 18 – – – –
Piskunov et al. 2008 1.89 2.02 – 5 – 1016(1) – –
Piskunov et al. 2007 1.89 2.02 – 5 – 161 – –
van den Bergh 2006 1.89 2.54 – 7 – – – –
Kharchenko et al. 2005 1.89 2.02 – 5 – – – –
Kharchenko et al. 2003 1.89 2.20 – – – – – –
Chen et al. 2003 1.89 – – 0 – – – –
Dias et al. 2002 2.34 2.70 – 3 – – – –
Dambis 1999 1.93 2.40 – 3 – – – –

(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 0248 15.8 38.21 61.47 0.46 -0.78 -0.74 -42.45 0.0
CWWDL 13950 2.4 37.97 61.18 0.44 -0.78 -0.26 -18.56 0.06

💡 Note: The % column shows the percentage of members that IC 1805 shares with each listed object.

Visualization
ℹī¸
IC 1805 UCC
IC 1805 HUNT23
IC 1805 CANTAT20
Galactocentric position diagram