All names: EQ J2135+0054, SDSS J213559.73+005453.86, SDSS J213559.73+005453.8, Gaia DR3 2688248141128025472, Gaia EDR3 2688248141128025472, Gaia DR2 2688248141128025472, GALEX J213559.6+005453
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | SDSS DR10 | Bedard et al. 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 35 59.73 (0.4) | 21 35 59.73 | 21 35 59.73 | 21 35 59.73 (0.5) | 21 35 59.73 (0.4) | 21 35 59.73 | |||||
| Declination | 00 54 53.92 (0.5) | 00 54 53.87 | 00 54 53.87 | 00 54 53.92 (0.7) | 00 54 53.97 (0.5) | 00 54 53.90 | |||||
| Spectral type | DO | DO | DOB | SDO: | |||||||
| Effective temperature | [K] | 59589.0 (1988) | 50000.0 (50) | 13714.0 (175) | |||||||
| log(g) | [cgs] | 7.91 (0.2) | 7.07 (0.07) | 8.94 (0.07) | |||||||
| Mass | [M☉] | 0.62 (0.1) | |||||||||
| log(Luminosity) | [L☉] | 0.37 (0.2) | |||||||||
| Cooling age | [Gyr] | 0.0014 (0.0003) | |||||||||
| 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] | 0.71 (0.4) | -0.19 (0.5) | 0.71 (0.4) | |||||||
| Distance | [pc] | 1413.69 (846) | 1413.63 (846) | ||||||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 4.04389118 (0.5) | 3.325848388 (0.9) | 4.044 (0.5) | -0.3 | ||||||
| Proper motion (declination) | [mas/yr] | -3.50561968 (0.5) | -2.788965962 (1) | -3.506 (0.5) | -6.3 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 18.66 (0.02) | 18.66 (0.02) | 18.71 (0.02) | 18.67 (0.02) | 18.72 (0.03) | ||||||
| g magnitude | 18.97 (0.009) | 18.97 (0.009) | 19.02 (0.02) | 18.97 (0.01) | 19.05 (0.02) | ||||||
| r magnitude | 19.28 (0.01) | 19.28 (0.01) | 19.33 (0.02) | 19.27 (0.01) | 19.35 (0.02) | ||||||
| i magnitude | 19.46 (0.02) | 19.46 (0.02) | 19.53 (0.02) | 19.39 (0.02) | 19.49 (0.02) | ||||||
| z magnitude | 19.59 (0.07) | 19.59 (0.07) | 19.64 (0.07) | 19.55 (0.08) | 19.65 (0.07) | ||||||
| G magnitude | 19.26 (0.02) | 19.29 | 19.26 (0.005) | ||||||||
| BP magnitude | 19.05 (0.02) | 18.96 | |||||||||
| RP magnitude | 19.11 (0.04) | 19.14 | |||||||||
| Pan g magnitude | 19.10 (0.01) | ||||||||||
| Pan r magnitude | 19.37 (0.007) | ||||||||||
| Pan i magnitude | 19.55 (0.01) | ||||||||||
| Pan z magnitude | 19.65 (0.03) | ||||||||||
| Pan y magnitude | 19.67 (0.09) | ||||||||||
| E(B-V) | 0.041 | ||||||||||
* 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.