All names: SDSS J153844.22+025209.4, Gaia EDR3 4424162321742140928, GALEX J153844.2+025210, SDSS J153844.21+025209.5, J1538+0252, EQ J1538+0252, USNO-B1.0 0928-00339310, Gaia DR3 4424162321742140928, Gaia DR2 4424162321742140928
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Gianninas et al. 2014 | Simbad |
|---|---|---|---|---|---|---|
| Right ascension | 15 38 44.19 (0.2) | 15 38 44.19 (0.2) | 15 38 44.22 (0.2) | |||
| Declination | 02 52 09.58 (0.1) | 02 52 09.58 (0.1) | 02 52 09.58 (0.1) | |||
| Spectral type | DA | D | ||||
| Effective temperature | [K] | 10260.0 (150) | ||||
| log(g) | [cgs] | 5.98 (0.06) | ||||
| Mass | [M☉] | 0.168 | ||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | 1.7260 (0.1) | ||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | -7.18 | |||||
| log(C/H) | ||||||
| log(N/H) | ||||||
| log(O/H) | ||||||
| log(Na/H) | ||||||
| log(Mg/H) | ||||||
| log(Al/H) | ||||||
| log(Si/H) | ||||||
| log(P/H) | ||||||
| log(S/H) | ||||||
| log(Sc/H) | ||||||
| log(Ti/H) | ||||||
| log(Cr/H) | ||||||
| log(Mn/H) | ||||||
| log(Fe/H) | ||||||
| log(Ni/H) | ||||||
| Parallax | [mas] | 0.71 (0.2) | 0.38 (0.3) | 0.71 (0.2) | ||
| Distance | [pc] | 1408.36 (403) | 2659.57 (1827) | 1195.00 (183) | 1408.45 (403) | |
| Composition | H | |||||
| Proper motion (right ascension) | [mas/yr] | -27.29114232 (0.2) | -27.587 (0.4) | -27.291 (0.2) | ||
| Proper motion (declination) | [mas/yr] | -0.251539866 (0.2) | -0.179 (0.4) | -0.252 (0.2) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | WDMS | |||||
| B magnitude | 18.40 | |||||
| V magnitude | ||||||
| R magnitude | 19.00 | |||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | ||||||
| g magnitude | ||||||
| r magnitude | ||||||
| i magnitude | ||||||
| z magnitude | ||||||
| G magnitude | 18.82 (0.02) | 18.85 | 18.82 (0.003) | |||
| BP magnitude | 18.84 (0.02) | 18.81 | ||||
| RP magnitude | 18.89 (0.02) | 18.82 | ||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.044 | |||||
* 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.