Ruprecht 18
(MWSC 1211; FoF 32)
Summary
Ruprecht 18 is a rich, very dense object of very high C3 quality. It is located at a moderate distance from the Sun, below the mid-plane. It is very well-studied in the literature.
This object shares a large percentage of members with a later reported entry.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dambis (1999) | 111.162 | -26.217 | – | – | – | – |
| Dias et al. (2002) | 111.162 | -26.217 | – | -1.45 | 2.43 | – |
| Chen et al. (2003) | 111.16 | -26.209 | – | – | – | – |
| Kharchenko et al. (2013) | 111.18 | -26.21 | – | -2.48 | 1.58 | 31.0 |
| Kharchenko et al. (2016) | 111.174 | -26.208 | – | – | – | – |
| Loktin & Popova (2017) | 111.165 | -26.217 | – | -3.694 | 1.445 | 31.0 |
| Cantat-Gaudin et al. (2018) | 111.16 | -26.213 | 0.364 | -0.487 | 1.127 | – |
| Soubiran et al. (2018) | 111.16 | -26.213 | – | – | – | 31.52 |
| Dias et al. (2019) | 111.162 | -26.217 | 0.372 | -0.495 | 1.159 | 31.403 |
| Liu & Pang (2019) | 111.149 | -26.21 | 0.367 | -0.517 | 1.136 | – |
| Cantat-Gaudin et al. (2020) | 111.16 | -26.213 | 0.364 | -0.487 | 1.127 | – |
| Dias et al. (2021) | 111.152 | -26.224 | 0.369 | -0.493 | 1.107 | 31.487 |
| Just et al. (2023) | 111.174 | -26.208 | – | – | – | – |
| Hunt & Reffert (2023) | 111.164 | -26.207 | 0.382 | -0.465 | 1.165 | 36.134 |
| Cavallo et al. (2024) | 111.137 | -26.225 | 0.383 | – | – | – |
| Hunt & Reffert (2024) | 111.164 | -26.207 | 0.382 | -0.465 | 1.165 | 36.134 |
| Almeida et al. (2025) | 111.152 | -26.224 | – | – | – | – |
| UCC | 111.159 | -26.209 | 0.378 | -0.461 | 1.154 | 38.366 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dambis (1999) | E_B-V_=0.743, DM0=10.04, log_age_=7.9 |
| Dias et al. (2002) | E(B-V)=0.7, Dist=1056.0, Age=7.648, [Fe/H]=-0.01 |
| Chen et al. (2003) | E(B-V)=0.7, HDis=1056, Age=0.04, [Fe/H]_1=-0.01 |
| Kharchenko et al. (2013) | E(B-V)=0.687, d=1499.0, logt=8.455, [Fe/H]=-0.01 |
| Kharchenko et al. (2016) | E(B-V)=0.687, d=1499.0, logt=8.455 |
| Loktin & Popova (2017) | E(B-V)=0.703, Dist=1179, logt=7.538 |
| Cantat-Gaudin et al. (2018) | dmode=2544.1 |
| Soubiran et al. (2018) | dmode=2544.1 |
| Dias et al. (2019) | E(B-V)=0.57, Dist=2317, logAge=7.676, Z=0.004 |
| Liu & Pang (2019) | Age=0.214, Z=-0.75 |
| Cantat-Gaudin et al. (2020) | AVNN=1.43, DistPc=2655.0, AgeNN=8.11 |
| Dias et al. (2021) | Av=1.953, Dist=2259, logage=8.114, [Fe/H]=0.123 |
| Just et al. (2023) | logt=8.455, logmt=1.855 |
| Hunt & Reffert (2023) | AV50=1.838, diffAV50=2.48, MOD50=11.9, logAge50=8.208 |
| Cavallo et al. (2024) | AV50=2.03, dMod50=11.98, logAge50=8.43, [Fe/H]50=0.38 |
| Hunt & Reffert (2024) | MassJ=2240.23, MassTot=2242.35 |
| Almeida et al. (2025) | AV=1.953, Dist=2259, logAge=8.114, MassRk=1248.2 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| FSR 1300 | 88.6 | 111.16 | -26.22 | 0.38 | -0.46 | 1.16 | 38.53 | 0.02 |