Majaess 99
0.40
UTI
0.75
CN
0.76
Cdens
0.5
CC3
0.44
Clit
0.7
Cdup
Nm (P>50%)
110
Core radius and density
1.3 [pc], 3.8 [pc-2]
- CN 0.75 Rich
- Cdens 0.76 Dense
- CC3 0.5 Intermediate quality
- Clit 0.44 Poorly studied
- Cdup 0.7 Likely 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
Majaess 99 is a rich, dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is poorly studied in the literature.
Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously 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 | 125.539 | -42.103 | 0.66 | -4.335 | 5.247 | 0.76 |
| Liu et al. | 2025 | 125.49 | -42.08 | 0.66 | -4.34 | 5.23 | 11.0 |
| Hunt & Reffert | 2024 | 125.489 | -42.084 | 0.66 | -4.344 | 5.232 | 10.996 |
| Cavallo et al. | 2024 | 125.616 | -42.128 | 0.663 | â | â | â |
| Hunt & Reffert | 2023 | 125.489 | -42.084 | 0.66 | -4.344 | 5.232 | 10.996 |
| Monteiro & Dias | 2019 | 125.438 | -42.082 | â | -4.372 | 5.187 | 2.308 |
| Dias et al. | 2018 | â | â | â | -6.21 | 5.56 | â |
| Sampedro et al. | 2017 | 125.438 | -42.082 | â | -4.22 | 1.92 | â |
| Dias et al. | 2016 | 125.438 | -42.082 | â | -4.51 | 1.54 | â |
| Dias et al. | 2014 | 125.438 | -42.082 | â | -4.29 | 2.62 | 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 | 1.45 | 1.43 | 2.71 | 6 | 0.181 | 396 | â | â |
| Liu et al. | 2025 | 1.51 | 0.44 | â | 35 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.45 | 1.80 | 2.71 | 6 | â | 396(1) | â | â |
| Cavallo et al. | 2024 | 1.40 | 1.43 | â | 59 | 0.350 | â | â | â |
| Hunt & Reffert | 2023 | 1.45 | 1.80 | 2.71 | 6 | â | â | â | â |
| Monteiro & Dias | 2019 | 1.32 | 0.06 | â | 5 | 0.012 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 218 along with HSC_2091, and as primordial binary cluster 354 along with Theia_1079, and of multiple system 62 along with HSC_2091 and Theia_1079.
Palma et al. (2025)
Part of multiple system G213, along with OC_0471, CWNU_339, HSC_2091 and Theia_1079.
Cavallo et al. (2024)
Bronze sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.57 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.57 (50th percentile).