Collinder 7
(NGC 225; MWSC 68; OCL 305)
Summary
Collinder 7 is a rich, very dense object of very high C3 quality. It is located at a close distance from the Sun, near the mid-plane. It is very well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 10.912 | 61.775 | – | -1.23 | -0.06 | -28.0 |
| Kharchenko et al. (2003) | 10.87 | 61.79 | – | -2.9 | 1.32 | – |
| Kharchenko et al. (2005) | 10.92 | 61.78 | – | -3.18 | 1.99 | -28.0 |
| Kharchenko et al. (2007) | 10.92 | 61.78 | – | 0.2 | – | -28.0 |
| Piskunov et al. (2008) | 10.91 | 61.778 | – | – | – | – |
| Kharchenko et al. (2012) | 10.8 | 61.782 | – | -3.09 | -0.75 | -28.0 |
| Kharchenko et al. (2013) | 10.8 | 61.782 | – | -3.09 | -0.75 | -28.0 |
| Kharchenko et al. (2016) | 10.789 | 61.779 | – | – | – | – |
| Loktin & Popova (2017) | 10.92 | 61.775 | – | -2.822 | -2.387 | -28.0 |
| Cantat-Gaudin et al. (2018) | 10.805 | 61.774 | 1.432 | -5.373 | -0.093 | – |
| Bica et al. (2019) | 10.888 | 61.787 | – | – | – | – |
| Soubiran et al. (2018) | 10.805 | 61.774 | – | – | – | -4.12 |
| Bossini et al. (2019) | 10.805 | 61.774 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 10.805 | 61.774 | 1.432 | -5.373 | -0.093 | – |
| Dias et al. (2021) | 10.777 | 61.778 | 1.428 | -5.4 | -0.079 | -1.478 |
| Rain et al. (2021) | 10.805 | 61.774 | 1.432 | -5.373 | -0.093 | – |
| Jaehnig et al. (2021) | 10.929 | 61.812 | 1.45 | -5.329 | -0.131 | – |
| Tarricq et al. (2022) | 10.746 | 61.773 | 1.428 | -5.349 | -0.246 | – |
| He et al. (2022) | 10.82 | 61.795 | 1.453 | -5.343 | -0.195 | – |
| Just et al. (2023) | 10.789 | 61.779 | – | – | – | – |
| Hunt & Reffert (2023) | 10.981 | 61.793 | 1.437 | -5.361 | -0.243 | -11.634 |
| Cavallo et al. (2024) | 9.819 | 61.926 | 1.44 | – | – | – |
| Hunt & Reffert (2024) | 10.981 | 61.793 | 1.437 | -5.361 | -0.243 | -11.634 |
| Alfonso et al. (2024) | 10.688 | 61.833 | 1.413 | -5.32 | -0.206 | – |
| Almeida et al. (2025) | 10.777 | 61.778 | – | – | – | – |
| UCC | 10.858 | 61.776 | 1.444 | -5.34 | -0.172 | -11.742 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.274, Dist=657.0, Age=8.114 |
| Kharchenko et al. (2003) | E(B-V)=0.27, Dist=657 |
| Kharchenko et al. (2005) | E(B-V)=0.27, Dist=657, logt=8.19 |
| Piskunov et al. (2008) | E(B-V)=0.27, Dist=657, logt=8.19, logMA=1.787 |
| Kharchenko et al. (2012) | E(B-V)=0.6, d=850.0, logt=8.191 |
| Kharchenko et al. (2013) | E(B-V)=0.6, d=850.0, logt=8.191 |
| Kharchenko et al. (2016) | E(B-V)=0.6, d=850.0, logt=8.191 |
| Loktin & Popova (2017) | E(B-V)=0.274, Dist=661, logt=8.104 |
| Cantat-Gaudin et al. (2018) | dmode=684.3 |
| Soubiran et al. (2018) | dmode=684.3 |
| Bossini et al. (2019) | AV=0.821, Dist=9.249, logA=8.254, Fe/H=0.0 |
| Cantat-Gaudin et al. (2020) | AVNN=0.54, DistPc=679.0, AgeNN=8.46 |
| Dias et al. (2021) | Av=0.924, Dist=678, logage=8.348, [Fe/H]=0.202 |
| Rain et al. (2021) | E(B-V)=0.25, Dist=684.3, log(Age)=8.25, NBSS=0 |
| Jaehnig et al. (2021) | dmode=0.689 |
| Tarricq et al. (2022) | Dist=668, logAgeNN=8.47 |
| He et al. (2022) | A0=1.1, logAge=7.9 |
| Just et al. (2023) | logt=8.191, logmt=1.134 |
| Hunt & Reffert (2023) | AV50=0.765, diffAV50=1.101, MOD50=9.093, logAge50=7.97 |
| Cavallo et al. (2024) | AV50=1.05, dMod50=9.25, logAge50=8.14, [Fe/H]50=0.26 |
| Hunt & Reffert (2024) | MassJ=201.512, MassTot=353.460 |
| Alfonso et al. (2024) | AV=0.53962, MOD=9.16003, logAge=8.33154, Z=0.20191 |
| Almeida et al. (2025) | AV=0.924, Dist=678, logAge=8.348, MassRk=81.5 |
Search coordinates in Bayestar19