NGC 1901
Summary
NGC 1901 is a rich, very dense object of very high C3 quality. It is located at a very close distance from the Sun, below the mid-plane. It is very well-studied in the literature.
This object shares a significant percentage of members with a later reported entry.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 79.546 | -68.45 | – | -0.03 | 0.9 | 0.5 |
| Piskunov et al. (2007) | 79.567 | -68.443 | – | – | – | – |
| Piskunov et al. (2008) | 79.567 | -68.443 | – | – | – | – |
| Kharchenko et al. (2012) | 79.56 | -68.44 | – | 1.68 | 9.54 | – |
| Loktin & Popova (2017) | 79.545 | -68.45 | – | 1.128 | 1.752 | -2.1 |
| Angelo et al. (2019) | 79.558 | -68.444 | – | – | – | – |
| Cantat-Gaudin et al. (2018) | 79.561 | -68.294 | 2.358 | 1.537 | 12.67 | – |
| Soubiran et al. (2018) | 79.561 | -68.294 | – | – | – | 0.85 |
| Bossini et al. (2019) | 79.561 | -68.294 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 79.561 | -68.294 | 2.358 | 1.537 | 12.67 | – |
| Dias et al. (2021) | 79.708 | -68.299 | 2.356 | 1.571 | 12.674 | 1.259 |
| Rain et al. (2021) | 79.561 | -68.294 | 2.358 | 1.537 | 12.67 | – |
| Jaehnig et al. (2021) | 79.293 | -68.382 | 2.392 | 1.697 | 12.651 | – |
| Tarricq et al. (2022) | 79.391 | -68.33 | 2.408 | 1.703 | 12.709 | – |
| He et al. (2022) | 79.65 | -68.229 | 2.391 | 1.718 | 12.716 | – |
| Hunt & Reffert (2023) | 79.288 | -68.441 | 2.367 | 1.703 | 12.701 | 0.327 |
| Cavallo et al. (2024) | 79.579 | -68.081 | 2.376 | – | – | – |
| Hunt & Reffert (2024) | 79.288 | -68.441 | 2.367 | 1.703 | 12.701 | 0.327 |
| Alfonso et al. (2024) | 79.758 | -68.138 | 2.356 | 1.681 | 12.708 | – |
| Almeida et al. (2025) | 79.708 | -68.299 | – | – | – | – |
| Hu & Soubiran (2025) | 79.579 | -68.081 | – | – | – | – |
| UCC | 79.534 | -68.305 | 2.387 | 1.697 | 12.701 | 0.978 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.03, Dist=460.0, Age=8.78, [Fe/H]=-0.018 |
| Piskunov et al. (2007) | E(B-V)=0.02, Dist=409, logt=8.93, logM=1.945 |
| Piskunov et al. (2008) | E(B-V)=0.02, Dist=409, logt=8.93, logM=2.204, logMA=2.095 |
| Kharchenko et al. (2012) | e_bv=0.021, distance=406, log_age=8.85, metallicity=-0.331 |
| Loktin & Popova (2017) | E(B-V)=0.047, Dist=437, logt=8.653 |
| Angelo et al. (2019) | dsun=0.42, Age=0.5, Mphot=22 |
| Cantat-Gaudin et al. (2018) | dmode=419.0 |
| Soubiran et al. (2018) | dmode=419.0 |
| Bossini et al. (2019) | AV=0.146, Dist=8.059, logA=8.918, Fe/H=-0.08 |
| Cantat-Gaudin et al. (2020) | AVNN=0.21, DistPc=427.0, AgeNN=8.95 |
| Dias et al. (2021) | Av=0.113, Dist=419, logage=8.935, [Fe/H]=-0.042 |
| Rain et al. (2021) | E(B-V)=0.03, Dist=419.0, log(Age)=8.78, NBSS=0 |
| Jaehnig et al. (2021) | dmode=0.418 |
| Tarricq et al. (2022) | Dist=422, logAgeNN=8.95 |
| He et al. (2022) | A0=0.25, logAge=8.95 |
| Hunt & Reffert (2023) | AV50=0.124, diffAV50=0.401, MOD50=8.008, logAge50=8.451 |
| Cavallo et al. (2024) | AV50=0.31, dMod50=8.15, logAge50=8.73, [Fe/H]50=0.26 |
| Hunt & Reffert (2024) | MassJ=193.668, MassTot=378.053 |
| Alfonso et al. (2024) | AV=0.20941, MOD=8.15019, logAge=8.88310, Z=-0.0421 |
| Almeida et al. (2025) | AV=0.113, Dist=419, logAge=8.935, MassRk=91.1 |
| Hu & Soubiran (2025) | MA22=-0.29, MA23f=-0.14, MZ23=-0.18, MK24=-0.15, MF24=-0.17 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| CWWDL 14525 | 52.6 | 79.33 | -68.29 | 2.4 | 1.75 | 12.7 | 1.1 | 0.0 |