NGC 581
(FoF 2131)
Summary
NGC 581 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 small percentage of members with 5 later reported entries.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dambis (1999) | 23.346 | 60.65 | – | – | – | – |
| Dias et al. (2002) | 23.346 | 60.65 | – | -1.6 | 0.66 | -44.2 |
| Chen et al. (2003) | 23.242 | 60.662 | – | -1.6 | 0.66 | -37.0 |
| Piskunov et al. (2008) | 23.339 | 60.645 | – | – | – | – |
| Kharchenko et al. (2012) | 23.316 | 60.652 | – | -1.14 | 0.37 | – |
| Loktin & Popova (2017) | 23.34 | 60.65 | – | -0.263 | -0.467 | -41.4 |
| Cantat-Gaudin et al. (2018) | 23.339 | 60.659 | 0.373 | -1.384 | -0.497 | – |
| Soubiran et al. (2018) | 23.339 | 60.659 | – | – | – | -45.33 |
| Bossini et al. (2019) | 23.339 | 60.659 | – | – | – | – |
| Dias et al. (2019) | 23.346 | 60.65 | 0.37 | -1.382 | -0.504 | -45.33 |
| Liu & Pang (2019) | 23.293 | 60.638 | 0.455 | -1.367 | -0.544 | – |
| Cantat-Gaudin et al. (2020) | 23.339 | 60.659 | 0.373 | -1.384 | -0.497 | – |
| Dias et al. (2021) | 23.331 | 60.66 | 0.374 | -1.383 | -0.493 | – |
| Rain et al. (2021) | 23.339 | 60.659 | 0.373 | -1.384 | -0.497 | – |
| Jaehnig et al. (2021) | 23.331 | 60.658 | 0.4 | -1.389 | -0.504 | – |
| Hunt & Reffert (2023) | 23.36 | 60.656 | 0.366 | -1.394 | -0.598 | -38.142 |
| Cavallo et al. (2024) | 23.327 | 60.66 | 0.366 | – | – | – |
| Celli et al. (2024) | 23.339 | 60.659 | – | – | – | – |
| Hunt & Reffert (2024) | 23.36 | 60.656 | 0.366 | -1.394 | -0.598 | -38.142 |
| Almeida et al. (2025) | 23.331 | 60.66 | – | – | – | – |
| UCC | 23.341 | 60.661 | 0.362 | -1.397 | -0.581 | -38.143 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dambis (1999) | E_B-V_=0.414, DM0=12.08, log_age_=7.2 |
| Dias et al. (2002) | E(B-V)=0.382, Dist=2194.0, Age=7.336 |
| Chen et al. (2003) | HDis=2194, Age=0.02 |
| Piskunov et al. (2008) | E(B-V)=0.39, Dist=2194, logt=7.44, logMA=2.245 |
| Kharchenko et al. (2012) | e_bv=0.331, distance=2199, log_age=7.44 |
| Loktin & Popova (2017) | E(B-V)=0.378, Dist=2200, logt=7.337 |
| Cantat-Gaudin et al. (2018) | dmode=2487.6 |
| Soubiran et al. (2018) | dmode=2487.6 |
| Bossini et al. (2019) | AV=1.213, Dist=12.117, logA=7.418, Fe/H=0.0 |
| Dias et al. (2019) | E(B-V)=0.34, Dist=2061, logAge=7.336, Z=0.003 |
| Liu & Pang (2019) | Age=0.06, Z=0.5 |
| Cantat-Gaudin et al. (2020) | AVNN=1.09, DistPc=2502.0, AgeNN=7.44 |
| Dias et al. (2021) | Av=1.45, Dist=2292, logage=7.469, [Fe/H]=-0.02 |
| Rain et al. (2021) | E(B-V)=0.38, Dist=2487.6, log(Age)=7.33, NBSS=0 |
| Jaehnig et al. (2021) | dmode=2.485 |
| Hunt & Reffert (2023) | AV50=1.29, diffAV50=0.93, MOD50=11.994, logAge50=7.671 |
| Cavallo et al. (2024) | AV50=1.58, dMod50=12.19, logAge50=7.35, [Fe/H]50=-0.1 |
| Celli et al. (2024) | Age=27.5, Mc=725.0 |
| Hunt & Reffert (2024) | MassJ=1262.03, MassTot=1262.03 |
| Almeida et al. (2025) | AV=1.45, Dist=2292, logAge=7.469, MassRk=831.0 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| Schoenball 1 | 16.3 | 23.42 | 60.75 | 0.23 | -1.29 | -0.65 | -37.74 | 0.17 |
| Gulliver 16 | 11.1 | 23.42 | 60.75 | 0.21 | -1.28 | -0.65 | -37.02 | 0.38 |
| Teutsch J0135.2+6041 | 9.1 | 23.44 | 60.67 | 0.36 | -1.44 | -0.61 | -38.14 | 0.09 |
| UBC 186 | 7.7 | 23.47 | 60.66 | 0.34 | -1.34 | -0.51 | – | 0.15 |
| CWWDL 6155 | 4.8 | 23.23 | 60.63 | 0.34 | -1.26 | -0.61 | – | 0.05 |