HSC 740
0.13
UTI
0.0
CN
0.02
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
3.4 [arcmin]
- CN 0.0 Sparse
- Cdens 0.02 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 740 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large* distance, above the mid-plane, affected by very high extinction. It is catalogued as a very massive, old cluster (see Parameters). It was recently reported in the literature.
(*): The parallax distance estimate (~14.18 kpc) differs significantly from the median photometric distance (~10.70 kpc).
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.
Extremely distant
Very high extinction
Very massive
Old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 321.238 | 52.813 | 0.07 | -2.442 | -2.643 | -94.852 |
| Hunt & Reffert | 2024 | 321.237 | 52.812 | 0.061 | -2.427 | -2.65 | â |
| Hunt & Reffert | 2023 | 321.237 | 52.812 | 0.061 | -2.427 | -2.65 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 6137* | â | â |
| Hunt & Reffert | 2023 | 10.70 | 5.59 | 1.71 | 1021 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
