ASCC 20

(MWSC 556)

Click to load Aladin Lite
0.86 UTI
0.8
CN
1.0
Cdens
1.0
CC3
0.75
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 244
Radius (P>50% members) 46.4 [arcmin]
  • CN 0.8 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.75 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
ASCC 20 is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is well-studied in the literature.

Note: This object shares a large percentage of members with 3 later reported entries. See table with shared members information.

Very close Low extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for ASCC 20 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 82.08 1.656 2.75 -0.556 0.778 29.188
Zhang et al. 2024 82.194 1.721 – – – –
Hunt & Reffert 2024 82.194 1.721 2.73 -0.569 0.759 27.886
Cavallo et al. 2024 82.006 1.698 2.731 – – –
Hunt & Reffert 2023 82.194 1.721 2.73 -0.569 0.759 27.886
Donor et al. 2020 82.189 1.64 – 1.42 -1.9 19.4
Kharchenko et al. 2016 82.183 1.64 – – – –
Dias et al. 2014 82.183 1.63 – 1.85 -3.36 –
Kharchenko et al. 2013 82.189 1.64 – 0.59 0.33 23.0
Gozha et al. 2012 82.183 1.63 – – – –
Piskunov et al. 2008 82.181 1.627 – – – –
Kharchenko et al. 2007 82.18 1.63 – 0.75 – 22.97
Piskunov et al. 2007 82.181 1.627 – – – –
Kharchenko et al. 2005 82.18 1.63 – -0.09 0.51 17.62

💡 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
Zhang et al. 2024 – – – – 0.050* – – –
Hunt & Reffert 2024 – – – – – 105* – –
Cavallo et al. 2024 0.37 0.53 – 13 0.030 – – –
Hunt & Reffert 2023 0.36 0.11 0.47 13 – – – –
Donor et al. 2020 – – – – 0.020 – – –
Kharchenko et al. 2016 0.39 0.19 – 10 – – – –
Kharchenko et al. 2013 0.39 0.19 – 10 – – – –
Gozha et al. 2012 0.45 – – 22 – 676 – –
Piskunov et al. 2008 0.45 0.12 – 22 – 1186* – –
Piskunov et al. 2007 0.45 0.12 – 22 – 622 – –
Kharchenko et al. 2005 0.45 0.12 – 22 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OCSN 57 97.1 82.08 1.67 2.74 -0.52 0.79 29.19 0.1
FoF 2371 37.7 82.39 2.02 2.69 -0.68 0.69 29.78 0.13
OCSN 56 17.2 82.64 2.37 2.53 -0.82 0.53 31.28 0.2

💡 Note: The % column shows the percentage of members that ASCC 20 shares with each listed object.

Visualization
ℹī¸
ASCC 20 UCC
ASCC 20 HUNT23
Galactocentric position diagram