All names: SDSS J090449.99+184758.6, SDSS J090449.96+184758.6, Gaia DR3 636214536349128960, Gaia EDR3 636214536349128960, SDSS J090449.97+184758.6, Gaia DR2 636214536349128960, GALEX J090450.0+184758, SDSS J090449.98+184758.6, WD 0902+190, LB 9239
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 04 49.96 (0.07) | 09 04 49.99 | 09 04 49.96 (0.09) | 09 04 49.96 | 09 04 50.01 (0.07) | 09 04 49.68 | ||||
| Declination | 18 47 58.50 (0.05) | 18 47 58.65 | 18 47 58.51 (0.07) | 18 47 58.50 | 18 47 58.65 (0.05) | 18 48 01.08 | ||||
| Spectral type | DA | DA | ? | DA | ||||||
| Effective temperature | [K] | 21833.0 (681) | ||||||||
| log(g) | [cgs] | 7.86 (0.03) | ||||||||
| Mass | [M☉] | 0.552 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 4.40 (0.08) | 4.47 (0.1) | 4.40 | 4.40 (0.08) | |||||
| Distance | [pc] | 227.07 (4) | 223.77 (6) | 227.07 | 227.07 (4) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -42.01430122 (0.08) | -41.86355182 (0.2) | -42.014 (0.08) | ||||||
| Proper motion (declination) | [mas/yr] | -9.259958731 (0.06) | -9.311653136 (0.1) | -9.26 (0.06) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 16.98 (0.008) | 16.98 (0.008) | ||||||||
| g magnitude | 16.99 (0.005) | 17.00 (0.005) | ||||||||
| r magnitude | 17.40 (0.006) | 17.39 (0.006) | ||||||||
| i magnitude | 17.71 (0.008) | 17.71 (0.008) | ||||||||
| z magnitude | 17.99 (0.02) | 17.99 (0.02) | ||||||||
| G magnitude | 17.22 (0.008) | 17.25 | 17.22 | 17.22 (0.003) | ||||||
| BP magnitude | 17.13 (0.008) | 17.09 | ||||||||
| RP magnitude | 17.41 (0.01) | 17.40 | ||||||||
| Pan g magnitude | 17.08 (0.004) | |||||||||
| Pan r magnitude | 17.41 (0.003) | |||||||||
| Pan i magnitude | 17.74 (0.006) | |||||||||
| Pan z magnitude | 18.02 (0.007) | |||||||||
| Pan y magnitude | 18.19 (0.02) | |||||||||
| E(B-V) | 0.015 | |||||||||
* 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.