Steine 20
0.50
UTI
0.64
CN
1.0
Cdens
0.75
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
79
Core radius and density
1.2 [pc], 5.8 [pc-2]
- CN 0.64 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.06 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
Steine 20 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with 2 later reported entries. 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 | 306.695 | 44.082 | 0.416 | -2.242 | -3.424 | -27.24 |
| Hunt & Reffert | 2024 | 306.694 | 44.08 | 0.402 | -2.244 | -3.414 | -27.247 |
| Cavallo et al. | 2024 | 306.698 | 44.088 | 0.406 | â | â | â |
| Hunt & Reffert | 2023 | 306.694 | 44.08 | 0.402 | -2.244 | -3.414 | -27.247 |
| Bica et al. | 2019 | 306.671 | 44.085 | 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 | 2.28 | 4.3 | 2.47 | 40 | 0.460 | 714 | â | â |
| Hunt & Reffert | 2024 | 2.28 | 4.30 | 2.47 | 40 | â | 714(1) | â | â |
| Cavallo et al. | 2024 | 1.81 | 4.02 | â | 170 | 0.460 | â | â | â |
| Hunt & Reffert | 2023 | 2.28 | 4.30 | 2.47 | 40 | 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 classes: 0.99 (50th percentile), true positive (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.99 (50th percentile), true positive (human-assigned).
Bica et al. (2019)
Asterisms and cluster alikes by B. Alessi reported in DAML02.