All names: GALEX J092128.0+024559, [TFW97] J092128.23+024602.25, LAMOST J092128.21+024602.3, 2MASS J09212821+0246023, GSC 00231-01572, UCAC2 32700643, Gaia EDR3 3845583703883921920, Gaia DR2 3845583703883921920, WD 0918+029, PG 0918+029, PG0918+029, TIC 290600010, Gaia DR3 3845583703883921920
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Geier 2020 | Gaia DR2 | Stilism | Guo et al. 2015 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 21 28.19 (0.04) | 09 21 28.23 | 09 21 28.19 (0.04) | 09 21 28.21 (0.04) | 09 21 27.89 | ||||
| Declination | 02 46 01.92 (0.03) | 02 46 02.20 | 02 46 01.93 (0.04) | 02 46 02.25 (0.03) | 02 45 59.76 | ||||
| Spectral type | sdB+WD | sdB | sdB1VIIHe6 | sdB/WD | |||||
| Effective temperature | [K] | 31460.0 (510) | |||||||
| log(g) | [cgs] | 5.79 (0.1) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 2.10 (0.05) | 1.98 (0.05) | 1.98 (0.05) | 2.10 (0.05) | ||||
| Distance | [pc] | 475.24 (11) | 505.64 (13) | 505.64 (13) | 475.24 (11) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -25.2087989 (0.06) | -25.512 (0.09) | -25.51227209 (0.09) | -25.209 (0.06) | ||||
| Proper motion (declination) | [mas/yr] | -20.60772988 (0.04) | -20.601 (0.07) | -20.60132562 (0.07) | -20.608 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | yes | ||||||||
| B magnitude | 13.06 (0.002) | ||||||||
| V magnitude | 13.33 (0.002) | ||||||||
| R magnitude | 13.46 (0.002) | ||||||||
| I magnitude | 13.62 (0.006) | ||||||||
| J magnitude | 13.95 (0.03) | 13.95 (0.03) | |||||||
| H magnitude | 14.16 (0.04) | 14.16 (0.04) | |||||||
| K magnitude | 14.22 (0.06) | 14.22 (0.06) | |||||||
| u magnitude | 13.16 (0.003) | ||||||||
| g magnitude | 13.23 (0.002) | ||||||||
| r magnitude | 13.67 (0.004) | ||||||||
| i magnitude | 14.11 (0.008) | ||||||||
| z magnitude | 14.26 (0.005) | ||||||||
| G magnitude | 13.28 (0.001) | 13.30 (0.0009) | 13.30 | 13.28 (0.003) | |||||
| BP magnitude | 13.13 (0.001) | 13.09 (0.01) | 13.09 | ||||||
| RP magnitude | 13.58 (0.0008) | 13.58 (0.002) | 13.58 | ||||||
| Pan g magnitude | 13.07 | 13.07 | |||||||
| Pan r magnitude | 13.55 (0.007) | 13.55 (0.007) | |||||||
| Pan i magnitude | 13.93 (0.003) | 13.93 (0.003) | |||||||
| Pan z magnitude | 14.20 (0.002) | 14.20 (0.002) | |||||||
| Pan y magnitude | 14.39 (0.004) | 14.39 (0.004) | |||||||
| E(B-V) | 0.031 | ||||||||
* 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.