All names: SDSS J214058.25-004528.9, SDSS J214058.24-004529.0, Gaia DR3 2686998713666980992, 2SLAQ J214058.24-004528.8, GALEX J214058.2-004528, SDSS J214058.23-004529.4, Gaia EDR3 2686998713666980992, SDSS J214058.23-004529.45, SDSS J214058.24-004528.8, Gaia DR2 2686998713666980992, SDSS J214058.24-004528.9, J2140-0045
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Coutu et al. 2019 | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 40 58.22 (0.3) | 21 40 58.25 | 21 40 58.25 | 21 40 58.22 (0.4) | 21 40 58.22 | 21 40 58.25 (0.3) | |||||
| Declination | -00 45 29.72 (0.2) | -00 45 28.87 | -00 45 28.81 | -00 45 29.70 (0.4) | -00 45 29.72 | -00 45 28.82 (0.2) | |||||
| Spectral type | DQ | DZ: | DQ | DQ | DQ | ||||||
| Effective temperature | [K] | 7524.0 (192) | 7514.0 (222) | 7524.0 (200) | |||||||
| log(g) | [cgs] | 8.02 | 8.00 (0) | 8.01 (0.07) | |||||||
| Mass | [M☉] | 0.5846 | 0.579 (0.06) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 1.3300 | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | -5.8951 (0.07) | ||||||||||
| log(Ca/He) | -9.42 (0.05) | ||||||||||
| 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] | 6.46 (0.3) | 6.48 | 6.48 (0.4) | 6.46 | 6.46 (0.3) | |||||
| Distance | [pc] | 154.87 (7) | 154.33 (1e+01) | 154.33 (1e+01) | 154.87 | 154.87 (7) | |||||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -28.84480981 (0.3) | -28.36469056 (0.7) | -28.845 (0.3) | |||||||
| Proper motion (declination) | [mas/yr] | -56.44372354 (0.3) | -57.07523628 (0.8) | -56.444 (0.3) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 19.64 (0.03) | 19.65 (0.03) | 19.64 (0.03) | ||||||||
| g magnitude | 19.34 (0.01) | 19.36 (0.02) | 19.34 (0.01) | ||||||||
| r magnitude | 19.25 (0.01) | 19.25 (0.02) | 19.25 (0.01) | ||||||||
| i magnitude | 19.34 (0.02) | 19.32 (0.02) | 19.34 (0.02) | ||||||||
| z magnitude | 19.38 (0.06) | 19.37 (0.06) | 19.38 (0.06) | ||||||||
| G magnitude | 19.23 (0.03) | 19.27 | 19.23 | 19.23 (0.004) | |||||||
| BP magnitude | 19.37 (0.03) | 19.31 | |||||||||
| RP magnitude | 18.99 (0.03) | 18.97 | |||||||||
| Pan g magnitude | 19.34 (0.02) | ||||||||||
| Pan r magnitude | 19.27 (0.007) | ||||||||||
| Pan i magnitude | 19.34 (0.01) | ||||||||||
| Pan z magnitude | 19.45 (0.02) | ||||||||||
| Pan y magnitude | 19.38 (0.06) | ||||||||||
| E(B-V) | 0.014 | ||||||||||
* 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.