MCM 20
(MCM2005b 20)
0.21
UTI
0.27
CN
0.17
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.8 [N/pc2]
- CN 0.27 Poorly populated
- Cdens 0.17 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.0 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
MCM 20 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 13 years.
Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.
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 | 288.095 | 9.954 | 0.201 | -2.98 | -5.608 | 142.986 |
| Morales et al. | 2013 | 288.101 | 9.957 | â | â | â | â |
| Mercer et al. | 2005 | 288.105 | 9.961 | 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 | 4.5 | â | â | 7 | â | â | â | â |
| Morales et al. | 2013 | 4.50 | â | â | 7 | â | â | â | â |
Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.
Mercer et al. (2005)
Cluster of stars. Detected using no magnitude cut. Detected in 2MASS catalog with our algorithm. Detected using 'bright' 3.6m magnitude cut.