NGC 6554
(MWSC 2821)
0.36
UTI
0.27
CN
0.13
Cdens
0.75
CC3
0.32
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
1.8 [pc], 0.7 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.13 Very loose
- CC3 0.75 High quality
- Clit 0.32 Poorly studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
NGC 6554 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 272.337 | -18.399 | 0.683 | -0.834 | -1.239 | -30.068 |
| Liu et al. | 2025 | 272.33 | -18.4 | 0.68 | -0.83 | -1.29 | -30.06 |
| Hunt & Reffert | 2024 | 272.332 | -18.395 | 0.677 | -0.833 | -1.292 | -30.064 |
| Cavallo et al. | 2024 | 272.338 | -18.365 | 0.675 | â | â | â |
| Hunt & Reffert | 2023 | 272.332 | -18.395 | 0.677 | -0.833 | -1.292 | -30.064 |
| Just et al. | 2023 | 272.223 | -18.444 | â | â | â | â |
| Dib et al. | 2018 | 272.23 | -18.443 | â | â | â | â |
| Sampedro et al. | 2017 | 272.246 | -18.435 | â | -0.44 | -1.27 | â |
| Joshi et al. | 2016 | 272.23 | -18.443 | â | â | â | â |
| Kharchenko et al. | 2016 | 272.223 | -18.444 | â | â | â | â |
| Dias et al. | 2014 | 272.246 | -18.435 | â | -0.56 | -1.5 | 15.0 |
| Kharchenko et al. | 2013 | 272.23 | -18.443 | â | 1.27 | -3.05 | 15.0 |
| Morales et al. | 2013 | 272.246 | -18.435 | â | â | â | â |
đĄ 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 | 99999â | 1.77 | 1.68 | 1.17 | 417 | 0.040 | 566 | â | â |
| Liu et al. | 2025 | 2.22 | 0.52 | â | 49 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.41 | 1.58 | 1.17 | 22 | â | 177(1) | â | â |
| Cavallo et al. | 2024 | 1.36 | 1.68 | â | 30 | 0.040 | â | â | â |
| Hunt & Reffert | 2023 | 1.41 | 1.58 | 1.17 | 22 | â | â | â | â |
| Just et al. | 2023 | â | â | â | 417 | â | 955 | â | â |
| Dib et al. | 2018 | 1.77 | â | â | 417 | â | â | â | â |
| Joshi et al. | 2016 | 1.77 | 2.50 | â | 417 | â | â | â | â |
| Kharchenko et al. | 2016 | 1.77 | 2.50 | â | 417 | â | â | â | â |
| Kharchenko et al. | 2013 | 1.77 | 2.50 | â | 417 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 292 along with NGC_6561, and of multiple system 26 along with CWNU_477 and NGC_6561.
Palma et al. (2025)
Part of multiple system G66, along with NGC_6561 and CWNU_477.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).
Cantat-Gaudin & Anders (2020)
Marked non-existent; searched for unsuccessfully in several studies despite catalogue entries. More details in Appendix A of the article.
Bica et al. (2019)
Original NGC and IC catalogues at Vizier: NGC 2000.0, Sky Publishing, ed. Sinnott 1988 (1997yCat.7118....0S).
Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: one or a few submm emission within the cluster area.