HSC 1637
0.13
UTI
0.0
CN
0.02
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Nm (P>50%)
21
Core radius and density
6.8 [pc], 0.09 [pc-2]
- CN 0.0 Sparse
- Cdens 0.02 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
HSC 1637 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate* distance, well below the mid-plane, affected by low extinction. It is catalogued as a very old cluster (see Parameters). It was recently reported in the literature.
(*): The parallax distance estimate (~4.59 kpc) differs significantly from the median photometric distance (~3.18 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 71.583 | -9.706 | 0.218 | 1.222 | -0.048 | -12.298 |
| Hunt & Reffert | 2024 | 71.576 | -9.711 | 0.25 | 1.178 | 0.198 | 56.422 |
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 | 3.18 | 0.24 | 1.26 | 5320 | â | 74 | â | â |
| Hunt & Reffert | 2024 | 3.18 | 0.24 | 1.26 | 5320 | â | 74(1) | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.02 (50th percentile).
Hunt & Reffert (2023)
Classified as moving group. CMD class: 0.02 (50th percentile).