Chamaleon I

(MWSC 1897)

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0.71 UTI
0.79
CN
1.0
Cdens
1.0
CC3
0.38
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 205
Radius (P>50% members) 33.0 [arcmin]
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.38 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Chamaleon I is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with 6 later reported entries. See table with shared members information.

Very close Moderate extinction Low mass Near-solar metallicity Very young

Cavallo et al. (2024)
Silver sample.

Data
🔍 Search references for Chamaleon I in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 167.162 -77.197 5.246 -22.534 0.286 13.923
Hunt & Reffert 2024 167.117 -77.499 5.261 -22.555 0.438 15.556
Cavallo et al. 2024 167.21 -76.927 5.268 – – –
Hunt & Reffert 2023 167.117 -77.499 5.261 -22.555 0.438 15.556
Just et al. 2023 165.892 -77.337 – – – –
Kharchenko et al. 2016 165.892 -77.337 – – – –
Kharchenko et al. 2013 165.9 -77.34 – -6.5 8.89 –

💡 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
Hunt & Reffert 2024 – – – – – 80* – –
Cavallo et al. 2024 0.20 2.89 – 8 0.370 – – –
Hunt & Reffert 2023 0.19 2.16 2.27 6 – – – –
Just et al. 2023 – – – 1 – 11 – –
Kharchenko et al. 2016 0.38 0.97 – 1 – – – –
Kharchenko et al. 2013 0.38 0.97 – 1 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
FoF 2435 99.5 167.16 -77.2 5.25 -22.53 0.28 13.92 0.0
OCSN 188 47.8 167.09 -77.49 5.29 -23.05 0.59 14.59 0.0
CWWDL 14679 41.0 167.44 -76.55 5.2 -22.07 -0.25 14.71 0.0
OC 0579 29.8 167.09 -77.56 5.27 -23.03 0.59 17.54 0.0
OCSN 187 27.3 167.49 -76.53 5.2 -21.84 -0.45 12.25 0.0
OC 0578 24.4 167.51 -76.51 5.19 -21.83 -0.52 12.25 0.0

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

Visualization
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Chamaleon I UCC
Chamaleon I HUNT23
Galactocentric position diagram