All names: KUV 09025+4253, SDSSJJ090548.02+424037.9, US 2309, GALEX J090548.0+424038, UCAC4 664-054173, SDSS J090548.02+424037.92, Gaia DR2 816805442855642496, SDSS J090548.01+424038.0, SDSS J090548.02+424037.9, Gaia EDR3 816805442855642496, Gaia DR3 816805442855642496
| Parameter | Unit | Gaia EDR3 | SDSS DR10 | Geier 2020 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|
| Right ascension | 09 05 48.03 (0.04) | 09 05 48.02 | 09 05 48.02 | 09 05 48.03 (0.04) | |||
| Declination | 42 40 37.83 (0.04) | 42 40 38.09 | 42 40 37.90 | 42 40 38.14 (0.04) | |||
| Spectral type | sdOB | sdO | sdO | ||||
| Effective temperature | [K] | 36317.0 (863) | 34735.0 (239) | ||||
| log(g) | [cgs] | 5.65 (0.1) | 5.46 (0.04) | ||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | 0.28 (0.06) | 0.25 (0.09) | 0.28 (0.06) | |||
| Distance | [pc] | 3556.85 (750) | 4024.14 (1459) | 3557.45 (750) | |||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | 2.782699606 (0.05) | 2.455 (0.1) | 2.783 (0.05) | |||
| Proper motion (declination) | [mas/yr] | -19.2652142 (0.05) | -19.154 (0.1) | -19.265 (0.05) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | 16.19 (0.04) | ||||||
| V magnitude | 16.14 (0.01) | ||||||
| R magnitude | 12.59 | ||||||
| I magnitude | |||||||
| J magnitude | 15.91 (0.07) | ||||||
| H magnitude | 15.54 (0.09) | ||||||
| K magnitude | 15.14 (0.1) | ||||||
| u magnitude | 16.28 (0.006) | 16.28 (0.006) | 16.26 (0.02) | 16.28 (0.006) | |||
| g magnitude | 16.29 (0.004) | 16.29 (0.004) | 16.34 (0.02) | 16.29 (0.004) | |||
| r magnitude | 16.54 (0.004) | 16.54 (0.004) | 16.56 (0.02) | 16.55 (0.004) | |||
| i magnitude | 16.63 (0.005) | 16.63 (0.005) | 16.68 (0.03) | 16.64 (0.005) | |||
| z magnitude | 16.72 (0.009) | 16.72 (0.009) | 16.77 (0.02) | 16.73 (0.009) | |||
| G magnitude | 16.43 (0.01) | 16.46 (0.001) | 16.43 (0.003) | ||||
| BP magnitude | 16.37 (0.01) | 16.35 (0.01) | |||||
| RP magnitude | 16.30 (0.02) | 16.30 (0.02) | |||||
| Pan g magnitude | 16.37 (0.01) | ||||||
| Pan r magnitude | 16.57 (0.007) | ||||||
| Pan i magnitude | 16.66 (0.007) | ||||||
| Pan z magnitude | 16.80 (0.006) | ||||||
| Pan y magnitude | 16.85 (0.007) | ||||||
| E(B-V) | 0.025 | ||||||
* 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.