Alessi 56
(MCM 19; MCM2005b 19; MWSC 3047; DSH J1906.8+0935; GLIMPSE 19; Mercer 19)
0.56
UTI
0.0
CN
1.0
Cdens
0.5
CC3
0.65
Clit
1.0
Cdup
Stellar density (N50/rad)
5.0 [N/pc2]
- CN 0.0 Sparse
- Cdens 1.0 Very dense
- CC3 0.5 Intermediate quality
- Clit 0.65 Moderately studied
- Cdup 1.0 Unique
Overview
Alessi 56 is a sparse, very dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by very high extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is moderately studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999β | 286.715 | 9.597 | 0.28 | -2.095 | -5.436 | β |
| He et al. | 2023 | 286.722 | 9.592 | 0.258 | -1.973 | -5.357 | β |
| Just et al. | 2023 | 286.716 | 9.588 | β | β | β | β |
| SΓ‘nchez et al. | 2020 | 286.717 | 9.583 | β | -1.805 | -5.152 | β |
| Bica et al. | 2019 | 286.714 | 9.584 | β | β | β | β |
| Kharchenko et al. | 2016 | 286.716 | 9.588 | β | β | β | β |
| Kharchenko et al. | 2013 | 286.722 | 9.59 | β | 0.23 | 0.17 | β |
| Morales et al. | 2013 | 286.719 | 9.583 | β | β | β | β |
| Bukowiecki et al. | 2011 | 286.725 | 9.585 | β | β | β | β |
| Kronberger et al. | 2006 | 286.717 | 9.583 | β | β | β | β |
| Mercer et al. | 2005 | 286.723 | 9.582 | β | β | β | β |
| Dias et al. | 2002 | 286.717 | 9.583 | β | 0.23 | 0.17 | β |
π‘ 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 | 99999β | 3.9 | 6.78 | β | 385 | β | 716 | β | β |
| He et al. | 2023 | 4.90 | 7.40 | β | 631 | β | β | β | β |
| Just et al. | 2023 | β | β | β | 385 | β | 902 | β | β |
| Kharchenko et al. | 2016 | 5.75 | 6.78 | β | 385 | β | β | β | β |
| Kharchenko et al. | 2013 | 5.75 | 6.78 | β | 385 | β | β | β | β |
| Morales et al. | 2013 | 3.90 | β | β | β | β | β | β | β |
| Bukowiecki et al. | 2012 | β | β | β | β | β | 529 | β | β |
| Bukowiecki et al. | 2011 | 2.26(1) | 9.21 | β | 25 | β | β | β | β |
| Kronberger et al. | 2006 | 3.90 | 6.20 | β | β | β | β | β | β |
| Dias et al. | 2002 | 3.90 | 6.20 | β | β | β | β | β | β |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
MOCA

Mercer et al. (2005)
Association of stars. Detected using no magnitude cut. Detected in 2MASS catalog with our algorithm.
Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.