Sh2-138
0.05
UTI
0.0
CN
0.0
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Nm (P>50%)
14
Core radius and density
7.3 [pc], 0.02 [pc-2]
- CN 0.0 Sparse
- Cdens 0.0 Very loose
- CC3 0.25 Low 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
Sh2-138 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane. No fundamental parameter values are available for this object. It is rarely studied in the literature, with no articles listed in the last 23 years.
Note: This object shares a very small 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 | 338.168 | 58.512 | 0.258 | -3.268 | -2.138 | -70.886 |
| Bica et al. | 2003 | 338.178 | 58.469 | â | â | â | â |
đĄ Note: The UCC values are estimated from its identified members.
Bica et al. (2003)
Classified as infrared cluster (IRC).