NGC 7772
0.11
UTI
0.27
CN
0.05
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
8.9 [arcmin]
- CN 0.27 Poorly populated
- Cdens 0.05 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
NGC 7772 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate* distance, well below the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 9 years.
(*): The parallax distance estimate (~3.95 kpc) differs significantly from the median photometric distance (~1.50 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.
Relatively close
Low extinction
Old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 357.922 | 16.233 | 0.253 | 0.747 | -3.064 | -13.463 |
| Loktin & Popova | 2017 | 357.945 | 16.247 | â | 12.29 | -9.5 | -31.5 |
| van den Bergh | 2006 | 357.942 | 16.247 | â | â | â | â |
| Dias et al. | 2002 | 357.942 | 16.247 | â | 12.29 | -9.5 | -24.0 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Loktin & Popova | 2017 | 0.59 | 0.03 | â | 1824 | â | â | â | â |
| van den Bergh | 2006 | 1.50 | 0.09 | â | 1479 | â | â | â | â |
| Dias et al. | 2002 | 1.50 | 0.09 | â | 1479 | â | â | â | â |
Cantat-Gaudin et al. (2020)
Compact grouping historically considered a remnant; Gaia DR2 and spectroscopy show no matching astrometric parameters, indicating an asterism. More details in Appendix A of the article.