Alessi 144
0.17
UTI
0.0
CN
0.15
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
1.6 [pc], 0.8 [pc-2]
- CN 0.0 Sparse
- Cdens 0.15 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.1 Rarely 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
Alessi 144 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is rarely studied in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 112.615 | 5.642 | 1.179 | -2.667 | -1.563 | 10.814 |
| Zhang et al. | 2024 | 112.592 | 5.717 | â | â | â | â |
| Hunt & Reffert | 2024 | 112.592 | 5.717 | 1.154 | -2.653 | -1.497 | 19.145 |
| Cavallo et al. | 2024 | 112.646 | 5.666 | 1.159 | â | â | â |
| Hunt & Reffert | 2023 | 112.592 | 5.717 | 1.154 | -2.653 | -1.497 | 19.145 |
| Bica et al. | 2019 | 112.605 | 5.486 | 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 | 0.81 | 0.08 | 0.35 | 128 | 0.035 | 84 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.210(1) | â | â | â |
| Hunt & Reffert | 2024 | 0.81 | 0.08 | 0.35 | 128 | â | 84(1) | â | â |
| Cavallo et al. | 2024 | 0.87 | 0.24 | â | 74 | 0.280 | â | â | â |
| Hunt & Reffert | 2023 | 0.81 | 0.08 | 0.35 | 128 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Bica et al. (2019)
List of clusters and alike reported by B. Alessi.