All names: SDSS J092023.40+222908.1, SDSS J092023.41+222908.12, SDSS J092023.41+222908.1, Gaia DR3 638648992531958144, GALEX J092023.4+222908, Gaia EDR3 638648992531958144, Gaia DR2 638648992531958144
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 20 23.42 (0.6) | 09 20 23.41 | 09 20 23.42 (1) | 09 20 23.41 (0.6) | |||||
| Declination | 22 29 08.31 (0.5) | 22 29 08.12 | 22 29 08.30 (2) | 22 29 08.05 (0.5) | |||||
| Spectral type | DA: | DA | DA | ||||||
| Effective temperature | [K] | 6771.0 (250) | |||||||
| log(g) | [cgs] | 7.30 (0.6) | |||||||
| Mass | [M☉] | 0.307 (0.2) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 3.93 (0.6) | 3.93 (0.6) | ||||||
| Distance | [pc] | 254.20 (40) | 254.19 (40) | ||||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 9.929475202 (0.7) | 9.929 (0.7) | ||||||
| Proper motion (declination) | [mas/yr] | 16.10430611 (0.7) | 16.104 (0.7) | ||||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 20.80 (0.06) | 20.80 (0.06) | 20.80 (0.07) | ||||||
| g magnitude | 20.26 (0.02) | 20.27 (0.03) | 20.26 (0.02) | ||||||
| r magnitude | 20.13 (0.02) | 20.15 (0.03) | 20.13 (0.02) | ||||||
| i magnitude | 20.08 (0.03) | 20.09 (0.03) | 20.08 (0.03) | ||||||
| z magnitude | 20.04 (0.1) | 20.03 (0.1) | 20.03 (0.1) | ||||||
| G magnitude | 20.10 (0.06) | 20.15 | 20.10 (0.005) | ||||||
| BP magnitude | 20.20 (0.06) | 20.34 | |||||||
| RP magnitude | 19.69 (0.07) | 19.85 | |||||||
| Pan g magnitude | 20.26 (0.02) | ||||||||
| Pan r magnitude | 20.13 (0.01) | ||||||||
| Pan i magnitude | 20.08 (0.02) | ||||||||
| Pan z magnitude | 20.10 (0.03) | ||||||||
| Pan y magnitude | 19.90 (0.02) | ||||||||
| E(B-V) | 0.028 | ||||||||
* 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.