Stephenson 1
(Del L; delta Lyr; OCL 137; MWSC 3018; FoF 2433; OCSN 263)
Summary
Stephenson 1 is a rich, very dense object of very high C3 quality. It is located at a very close distance from the Sun, above the mid-plane. It is very well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 283.375 | 36.917 | – | 1.4 | -2.46 | -27.47 |
| Piskunov et al. (2007) | 283.495 | 36.822 | – | – | – | – |
| Piskunov et al. (2008) | 283.495 | 36.822 | – | – | – | – |
| Kharchenko et al. (2012) | 283.515 | 36.805 | – | 1.95 | -3.48 | – |
| Loktin & Popova (2017) | 283.38 | 36.917 | – | 1.4 | -2.46 | -27.5 |
| Cantat-Gaudin et al. (2018) | 283.568 | 36.899 | 2.779 | 1.11 | -3.01 | – |
| Bica et al. (2019) | 283.601 | 36.87 | – | – | – | – |
| Soubiran et al. (2018) | 283.568 | 36.899 | – | – | – | -18.69 |
| Bossini et al. (2019) | 283.568 | 36.899 | – | – | – | – |
| Liu & Pang (2019) | 283.536 | 36.901 | 2.783 | 1.19 | -2.975 | – |
| Cantat-Gaudin et al. (2020) | 283.568 | 36.899 | 2.779 | 1.11 | -3.01 | – |
| Dias et al. (2021) | 283.523 | 36.932 | 2.776 | 1.16 | -2.998 | -18.895 |
| He et al. (2022) | 283.387 | 35.762 | 2.78 | 1.15 | -3.014 | – |
| Qin et al. (2023) | 283.6 | 36.87 | 2.8 | 1.15 | -3.07 | -18.46 |
| Hunt & Reffert (2023) | 283.578 | 36.881 | 2.798 | 1.121 | -3.018 | -20.127 |
| Cavallo et al. (2024) | 283.508 | 36.825 | 2.795 | – | – | – |
| Celli et al. (2024) | 283.568 | 36.899 | – | – | – | – |
| Hunt & Reffert (2024) | 283.578 | 36.881 | 2.798 | 1.121 | -3.018 | -20.127 |
| Alfonso et al. (2024) | 283.549 | 36.826 | 2.75 | 1.106 | -2.948 | – |
| Almeida et al. (2025) | 283.523 | 36.932 | – | – | – | – |
| UCC | 283.548 | 36.827 | 2.79 | 1.129 | -3.007 | -19.121 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.04, Dist=390.0, Age=7.731 |
| Piskunov et al. (2007) | E(B-V)=0.04, Dist=373, logt=7.69, logM=2.522 |
| Piskunov et al. (2008) | E(B-V)=0.04, Dist=373, logt=7.69, logM=2.77, logMA=2.983 |
| Kharchenko et al. (2012) | e_bv=0.031, distance=373, log_age=7.52 |
| Loktin & Popova (2017) | E(B-V)=0.04, Dist=370, logt=7.731 |
| Cantat-Gaudin et al. (2018) | dmode=356.1 |
| Soubiran et al. (2018) | dmode=356.1 |
| Bossini et al. (2019) | AV=0.157, Dist=7.71, logA=7.435, Fe/H=0.0 |
| Liu & Pang (2019) | Age=0.046, Z=0.25 |
| Cantat-Gaudin et al. (2020) | AVNN=0.22, DistPc=343.0, AgeNN=7.45 |
| Dias et al. (2021) | Av=0.225, Dist=355, logage=7.632, [Fe/H]=0.055 |
| He et al. (2022) | A0=0.45, logAge=7.55 |
| Qin et al. (2023) | E(B-V)=0.05, m-M=7.61, logt=7.65 |
| Hunt & Reffert (2023) | AV50=0.174, diffAV50=0.643, MOD50=7.726, logAge50=7.425 |
| Cavallo et al. (2024) | AV50=0.62, dMod50=7.87, logAge50=7.24, [Fe/H]50=0.0 |
| Celli et al. (2024) | Age=28.2, Mc=89.5 |
| Hunt & Reffert (2024) | MassJ=236.707, MassTot=267.749 |
| Alfonso et al. (2024) | AV=0.21822, MOD=7.68073, logAge=7.60099, Z=0.05518 |
| Almeida et al. (2025) | AV=0.225, Dist=355, logAge=7.632, MassRk=92.5 |
Search coordinates in Bayestar19