ASCC 9

(MWSC 228)

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0.91 UTI
0.81
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Radius (P>50% members) 8.6 [arcmin]
  • CN 0.81 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique

Overview

ASCC 9 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024): Gold sample.

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 41.704 57.735 0.401 0.162 -1.125 -48.277
Almeida et al. 2025 41.679 57.763
Hunt & Reffert 2024 41.624 57.777 0.402 0.169 -1.139 -23.791
Celli et al. 2024 41.671 57.743
Cavallo et al. 2024 41.691 57.735 0.402
Hunt & Reffert 2023 41.624 57.777 0.402 0.169 -1.139 -23.791
Just et al. 2023 41.733 57.743
Dias et al. 2021 41.679 57.763 0.409 0.16 -1.105
Cantat-Gaudin et al. 2020 41.671 57.743 0.406 0.166 -1.099
Dias et al. 2019 41.729 57.73 0.391 0.156 -1.086 -72.118
Cantat-Gaudin et al. 2018 41.671 57.743 0.406 0.166 -1.099
Kharchenko et al. 2016 41.733 57.743
Kharchenko et al. 2013 41.745 57.745 -0.32 -2.5 -41.8
Kharchenko et al. 2012 41.745 57.745 -0.41 -2.54 -41.75
Piskunov et al. 2008 41.71 57.726
Kharchenko et al. 2007 41.73 57.73 0.17 -41.75
Kharchenko et al. 2005 41.73 57.73 0.76 -3.03 -41.75
Dias et al. 2002 41.729 57.73 -0.93 -0.33 -40.73

💡 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] Bfr BSS
Almeida et al. 2025 2.32 2.57 9 645
Hunt & Reffert 2024 1143*
Celli et al. 2024 30 595
Cavallo et al. 2024 2.84 2.54 23 0.630
Hunt & Reffert 2023 2.34 2.50 1.08 29
Just et al. 2023 10 877
Dias et al. 2021 2.32 2.57 9 -0.159
Cantat-Gaudin et al. 2020 2.38 2.23 30
Dias et al. 2019 2.05 2.51 19 -2.028
Cantat-Gaudin et al. 2018 2.30
Kharchenko et al. 2016 2.90 2.79 10
Kharchenko et al. 2013 2.90 2.79 10
Kharchenko et al. 2012 2.90 2.79 10
Piskunov et al. 2008 2.90 2.79 6
Kharchenko et al. 2005 2.90 2.79 6
Dias et al. 2002 2.90 2.79 6

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.