All names: EC 21244-4158, Gaia DR3 6578965762246071808, Gaia DR2 6578965762246071808, TIC 129683429, 2MASS J21273629-4145210, MCT 2124-4158, Gaia EDR3 6578965762246071808
| Parameter | Unit | Gaia EDR3 | Bergeron et al. 2021 | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 27 36.34 (0.04) | 21 27 36.34 | 21 27 36.29 (0.04) | ||
| Declination | -41 45 20.59 (0.03) | -41 45 20.59 | -41 45 20.56 (0.03) | ||
| Spectral type | DB | DB | DB | ||
| Effective temperature | [K] | 18053.0 (741) | 16653.0 (281) | ||
| log(g) | [cgs] | 8.46 (0.2) | 7.96 (0.02) | ||
| Mass | [M☉] | 0.885 (0.1) | 0.566 (0.02) | ||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | 0.2658 | |||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| log(N/He) | |||||
| log(O/He) | |||||
| log(Na/He) | |||||
| log(Mg/He) | |||||
| log(Al/He) | |||||
| log(Si/He) | |||||
| log(P/He) | |||||
| log(S/He) | |||||
| log(Cl/He) | |||||
| log(Sc/He) | |||||
| log(Ti/He) | |||||
| log(V/He) | |||||
| log(Cr/He) | |||||
| log(Mn/He) | |||||
| log(Fe/He) | |||||
| log(Co/He) | |||||
| log(Ni/He) | |||||
| log(Cu/He) | |||||
| log(Zn/He) | |||||
| log(Ga/He) | |||||
| log(Ge/He) | |||||
| log(Sr/He) | |||||
| Parallax | [mas] | 8.73 (0.05) | 8.73 | 8.73 (0.05) | |
| Distance | [pc] | 114.56 (0.6) | 114.00 | 114.56 | 114.56 (0.6) |
| Composition | He | ||||
| Proper motion (right ascension) | [mas/yr] | 33.354 (0.04) | 33.354 (0.04) | ||
| Proper motion (declination) | [mas/yr] | -2.221 (0.04) | -2.221 (0.04) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 16.17 | ||||
| V magnitude | 16.23 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.56 (0.1) | ||||
| H magnitude | 16.58 (0.2) | ||||
| K magnitude | |||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 16.24 (0.003) | 16.24 | 16.24 (0.003) | ||
| BP magnitude | 16.17 (0.004) | ||||
| RP magnitude | 16.37 (0.005) | ||||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | |||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.