NGC 6647
0.10
UTI
0.0
CN
0.0
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.0 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.0 Very loose
- CC3 0.5 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
NGC 6647 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 12 years.
(*): The parallax distance estimate (~10.03 kpc) differs significantly from the median photometric distance (~2200.00 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 | 278.265 | -17.27 | 0.1 | -4.289 | -7.464 | 49.54 |
| Tadross | 2014 | 278.208 | -17.232 | â | â | â | 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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 2200.0 | 1.67 | â | 1600 | â | â | â | â |
| Tadross | 2014 | 2200.00 | 1.67 | â | 1600 | â | â | â | â |
Dias et al. (2002)
Asterism (Archinal, B. A. & Hynes, S. J. 2003); cat V3.5 (Jan 2016)