Alessi 191
0.26
UTI
0.28
CN
0.23
Cdens
0.75
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
28
Core radius and density
1.7 [pc], 1.1 [pc-2]
- CN 0.28 Poorly populated
- Cdens 0.23 Very loose
- CC3 0.75 High quality
- Clit 0.03 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 191 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 282.126 | 22.045 | 0.978 | -1.046 | 2.986 | -9.251 |
| Cavallo et al. | 2024 | 282.109 | 22.006 | 0.987 | â | â | â |
| Hunt & Reffert | 2023 | 282.135 | 22.061 | 0.979 | -1.049 | 3.03 | -8.989 |
| Bica et al. | 2019 | 282.117 | 22.054 | 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 | 1.015 | 0.705 | 0.68 | 673 | -0.060 | â | â | â |
| Cavallo et al. | 2024 | 1.05 | 0.96 | â | 389 | -0.060 | â | â | â |
| Hunt & Reffert | 2023 | 0.98 | 0.45 | 0.68 | 957 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.48 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.48 (50th percentile).
Bica et al. (2019)
Asterisms and cluster alikes by B. Alessi reported in DAML02.