Westerlund 1

(OCL 985; ESO 277 12; MWSC 2461)

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0.64 UTI
0.83
CN
1.0
Cdens
0.75
CC3
0.32
Clit
1.0
Cdup
Nm (P>50%) 305
Core radius and density 1.1 [pc], 29 [pc-2]
C3 classification AB
  • CN 0.83 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.32 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Westerlund 1 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by very high extinction. It is catalogued as an extremely massive, very young cluster (see Parameters). It is poorly studied in the literature.

Morales et al. (2013)
Classified as morphological type 'OC0' (emerging exposed cluster). Morphological flag: one or a few submm emission within the cluster area.

Data
🔍 Search references for Westerlund 1 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 251.76 -45.853 0.208 -2.282 -3.692 33.125
Celli et al. 2024 251.76 -45.852 – – – –
Cantat-Gaudin et al. 2020 251.76 -45.852 0.252 -2.325 -3.654 –
Cantat-Gaudin & Anders 2020 251.76 -45.852 0.252 -2.325 -3.654 –
Soubiran et al. 2018 251.76 -45.852 – – – -41.07
Bica et al. 2019 251.763 -45.848 – – – –
Cantat-Gaudin et al. 2018 251.76 -45.852 0.252 -2.325 -3.654 –
Sampedro et al. 2017 251.767 -45.843 – -1.27 -12.12 –
Morales et al. 2013 251.768 -45.846 – – – –
van den Bergh 2006 251.767 -45.845 – – – –
Dias et al. 2002 251.767 -45.843 – -4.5 -10.01 –
Lynga 1987 251.761 -45.834 – – – –

💡 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– 3.56 9.46 – 4 – 22227 – –
Celli et al. 2024 – – – 8 – 22227 – –
Kounkel et al. 2020 2.87 5.90 – 3 – – – –
Cantat-Gaudin & Anders 2020 3.56 – – – – – – –
Soubiran et al. 2018 3.56 – – – – – – –
Cantat-Gaudin et al. 2018 3.56 – – – – – – –
Morales et al. 2013 4.00 – – 4 – – – –
van den Bergh 2006 5.20 9.46 – – – – – –
Dias et al. 2002 5.50 13.72 – 5 – – – –
Lynga 1987 1.40 – – – – – – –

Visualization
ℹī¸
Westerlund 1 UCC
Westerlund 1 CANTAT20
Galactocentric position diagram