All names: GALEX J214203.9+225228, Gaia DR2 1794409921493969792, Gaia DR3 1794409921493969792, WDJ214203.89+225229.41, 2MASS J21420390+2252290, WD 2139+226, PM J21420+2252, LSPM J2142+2252, TIC 297877352, J2142+2252, Gaia EDR3 1794409921493969792, 21420+2252, USNO-B1.0 1128-00648120
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 42 04.02 (0.04) | 21 42 03.89 | 21 42 04.02 (0.06) | 21 42 04.02 | 21 42 03.89 (0.04) | 21 42 04.02 | 21 42 03.79 | |||||
| Declination | 22 52 27.26 (0.05) | 22 52 29.41 | 22 52 27.33 (0.09) | 22 52 27.26 | 22 52 29.41 (0.05) | 22 52 27.33 | 22 52 25.32 | |||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | ||||||
| Effective temperature | [K] | 8839.0 (38) | 9505.0 (297) | 8170.0 (150) | 8883.0 (67) | |||||||
| log(g) | [cgs] | 7.87 (0.007) | 8.09 | 8.00 (0) | 7.90 (0.01) | |||||||
| Mass | [M☉] | 0.504 (0.006) | 0.6367 | 0.58 (0.1) | 0.522 (0.009) | |||||||
| log(Luminosity) | [L☉] | -3.20 | ||||||||||
| Cooling age | [Gyr] | 0.7600 | 0.8180 | |||||||||
| log(H/He) | -4.0 | <-5.7983 | ||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | -10.46 | -10.2155 (0.03) | -10.78 | |||||||||
| 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] | 21.54 (0.04) | 21.44 (0.08) | 21.44 | 21.44 (0.08) | 21.54 | 21.54 (0.04) | 21.44 (0.08) | ||||
| Distance | [pc] | 46.42 (0.09) | 46.64 (0.2) | 46.64 (0.2) | 46.64 (0.2) | 38.90 (0.7) | 46.42 | 46.42 (0.09) | 46.64 (0.2) | |||
| Composition | He | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 114.2454358 (0.05) | 114.2622606 (0.09) | 114.245 (0.05) | 114.2622606 | |||||||
| Proper motion (declination) | [mas/yr] | -134.2759854 (0.06) | -134.0341804 (0.2) | -134.276 (0.06) | -134.0341804 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 15.90 | |||||||||||
| V magnitude | ||||||||||||
| R magnitude | 16.10 | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.86 (0.01) | 15.98 | 15.98 (0.1) | |||||||||
| H magnitude | 15.74 (0.03) | 15.74 | 15.74 (0.1) | |||||||||
| K magnitude | 15.54 (0.03) | 15.54 | ||||||||||
| u magnitude | 16.07 (0.006) | 16.10 (0.006) | ||||||||||
| g magnitude | 15.88 (0.003) | |||||||||||
| r magnitude | 15.95 (0.004) | |||||||||||
| i magnitude | 16.08 (0.004) | |||||||||||
| z magnitude | 16.23 (0.008) | |||||||||||
| G magnitude | 15.88 (0.003) | 15.90 | 15.88 | 15.88 (0.003) | 15.90 | |||||||
| BP magnitude | 15.93 (0.003) | 15.91 | 15.91 | |||||||||
| RP magnitude | 15.78 (0.004) | 15.79 | 15.79 | |||||||||
| Pan g magnitude | 15.91 (0.005) | 15.91 (0.005) | ||||||||||
| Pan r magnitude | 15.98 (0.004) | 15.98 (0.004) | ||||||||||
| Pan i magnitude | 16.11 (0.002) | 16.11 (0.002) | ||||||||||
| Pan z magnitude | 16.26 (0.003) | 16.26 (0.004) | ||||||||||
| Pan y magnitude | 16.37 (0.008) | 16.37 (0.006) | ||||||||||
| E(B-V) | 0.002 | |||||||||||
* 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.