All names: SDSS J013025.42+232805.48, Gaia DR2 290344462134278528, USNO-B1.0 1134-00024080, SDSS J013025.41+232805.4, Gaia EDR3 290344462134278528, SDSS J013025.42+232805.4, SDSS J013025.42+232805.5, Gaia DR3 290344462134278528, GALEX J013025.3+232805, USNO-A2.0 1125-00502405
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | Gaia DR2 | Stilism | Koester & Kepler 2015 | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 01 30 25.42 (0.1) | 01 30 25.41 | 01 30 25.42 (0.1) | 01 30 25.42 | 01 30 25.42 (0.1) | ||||||||
| Declination | 23 28 05.56 (0.08) | 23 28 05.47 | 23 28 05.55 (0.1) | 23 28 05.56 | 23 28 05.47 (0.08) | ||||||||
| Spectral type | DB | DB | DB | DB | |||||||||
| Effective temperature | [K] | 16686.0 | 15426.0 | 16898.0 (42) | 16879.0 (4) | 15200.0 (549) | |||||||
| log(g) | [cgs] | 8.20 | 8.06 | 8.23 (0.03) | 8.12 (0.003) | 8.04 (0.05) | |||||||
| Mass | [M☉] | 0.716 | 0.626 | 0.6579999999999999 (0.002) | 0.616 (0.04) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | ||||||||||||
| log(H/He) | -4.655 | -4.6 (0.1) | |||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | <-6.54 | ||||||||||||
| log(Ca/H) | |||||||||||||
| Parallax | [mas] | 5.04 (0.1) | 5.05 (0.1) | 5.04 | 5.04 (0.1) | ||||||||
| Distance | [pc] | 198.57 (5) | 197.92 (5) | 187.00 | 198.57 | 198.57 (5) | |||||||
| Composition | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -5.356521362 (0.1) | -5.55438289 (0.3) | -5.357 (0.1) | |||||||||
| Proper motion (declination) | [mas/yr] | 5.604238402 (0.09) | 5.670906508 (0.2) | 5.604 (0.09) | |||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.20 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 17.60 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 17.62 (0.01) | 17.64 (0.02) | 17.62 (0.01) | ||||||||||
| g magnitude | 17.68 (0.006) | 17.71 (0.02) | 17.68 (0.006) | ||||||||||
| r magnitude | 17.98 (0.007) | 17.99 (0.02) | 17.98 (0.007) | ||||||||||
| i magnitude | 18.21 (0.009) | 18.22 (0.02) | 18.21 (0.009) | ||||||||||
| z magnitude | 18.43 (0.03) | 18.43 (0.03) | 18.43 (0.03) | ||||||||||
| G magnitude | 17.82 (0.009) | 17.85 | 17.82 | 17.82 (0.003) | |||||||||
| BP magnitude | 17.77 (0.009) | 17.77 | |||||||||||
| RP magnitude | 17.91 (0.02) | 17.93 | |||||||||||
| Pan g magnitude | 17.80 (0.03) | ||||||||||||
| Pan r magnitude | 18.01 (0.01) | ||||||||||||
| Pan i magnitude | 18.23 (0.005) | ||||||||||||
| Pan z magnitude | 18.44 (0.008) | ||||||||||||
| Pan y magnitude | 18.57 (0.03) | ||||||||||||
| 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.