FoF 1641
(LP 1641)
0.50
UTI
0.75
CN
1.0
Cdens
0.75
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
13.7 [N/pc2]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 0.75 High 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
FoF 1641 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 277.912 | -10.166 | 0.315 | -1.172 | -3.306 | 34.01 |
| Almeida et al. | 2025 | 277.916 | -10.175 | â | â | â | â |
| He et al. | 2023 | 277.916 | -10.168 | 0.306 | -1.163 | -3.335 | 33.66 |
| Dias et al. | 2021 | 277.916 | -10.175 | 0.32 | -1.209 | -3.254 | 33.852 |
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 | 3.4 | 4.12 | â | 5 | 0.152 | 1568 | â | â |
| Almeida et al. | 2025 | 3.40 | 4.12 | â | 5 | â | 1568 | â | â |
| He et al. | 2023 | 2.69 | 5.35 | â | 50 | â | â | â | â |
| Dias et al. | 2021 | 3.40 | 4.12 | â | 5 | 0.152 | â | â | â |
Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.