Westerlund 2

Click to load Aladin Lite
UTI:
UCC Trust Index

C_N C_dens C_C3 C_lit C_dup
0.79 1.0 0.75 0.67 1.0
C3
N_50
r_50
AB 217 0.9
Summary

Westerlund 2 is a rich, very dense object of high C3 quality. It is located at a large distance from the Sun, near the mid-plane. It is moderately studied in the literature.

This object shares a large percentage of members with a later reported entry.

Search object in SciX | Simbad

Positions

Reference RA DEC Plx pmRA pmDE Rv
Dias et al. (2002) 156.008 -57.767 – -6.77 4.84 –
Loktin & Popova (2017) 156.015 -57.767 – -7.5 4.22 –
Cantat-Gaudin et al. (2018) 156.01 -57.758 0.209 -5.246 2.895 –
Cantat-Gaudin et al. (2020) 156.01 -57.758 0.209 -5.246 2.895 –
Hunt & Reffert (2023) 156.003 -57.756 0.192 -5.352 2.879 –
Cavallo et al. (2024) 156.008 -57.756 0.192 – – –
Celli et al. (2024) 155.992 -57.764 – – – –
Hunt & Reffert (2024) 156.003 -57.756 0.192 -5.352 2.879 –
           
UCC 156.01 -57.758 0.197 -5.32 2.871 68.86
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

Search coordinates in CDS | Simbad

Estimated members

Westerlund 2 UCC
Westerlund 2 HUNT23
Westerlund 2 CANTAT20

Explore data in Colab

Fundamental parameters

Reference Values
Dias et al. (2002) E(B-V)=1.65, Dist=2850.0, Age=6.3
Loktin & Popova (2017) E(B-V)=0.748, Dist=1920, logt=7.317
Cantat-Gaudin et al. (2018) dmode=4207.7
Hunt & Reffert (2023) AV50=4.518, diffAV50=3.026, MOD50=13.667, logAge50=7.88
Cavallo et al. (2024) AV50=4.46, dMod50=11.35, logAge50=8.24, [Fe/H]50=0.76
Celli et al. (2024) Age=4.0, Mc=2172.3
Hunt & Reffert (2024) MassJ=2389.55, MassTot=2465.59

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster % RA DEC Plx pmRA pmDE Rv UTI
Bica 417 78.8 156.01 -57.76 0.19 -5.35 2.86 – 0.03