All names: Gaia DR2 915310139832816256, UCAC2 46561173, 2MASS J08285756+4240418, GALEX J082857.6+424042, PG0825+428, Gaia DR3 915310139832816256, FBS 0825+428, Gaia EDR3 915310139832816256, FBS B 252, SDSS J082857.55+424042.0, PG 0825+428, TIC 27319282, SDSS J082857.54+424041.9, UCAC4 664-053293
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 28 57.54 (0.02) | 08 28 57.55 | 08 28 57.55 | 08 28 57.54 (0.03) | 08 28 57.55 (0.02) | 08 28 57.55 | |||
| Declination | 42 40 41.82 (0.02) | 42 40 41.99 | 42 40 41.40 | 42 40 41.83 (0.02) | 42 40 41.97 (0.02) | 42 40 42.01 | |||
| Spectral type | sdB+K1 | sdOD | SD_auto | ||||||
| Effective temperature | [K] | 31500.0 (59) | |||||||
| log(g) | [cgs] | 5.00 (0.002) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.52 (0.03) | 0.53 (0.04) | 0.53 (0.04) | 0.52 (0.03) | ||||
| Distance | [pc] | 1908.06 (106) | 1904.04 (150) | 1904.04 (150) | 1908.03 (106) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -7.515827301 (0.03) | -7.471 (0.06) | -7.471 (0.06) | -7.516 (0.03) | 1.1 | |||
| Proper motion (declination) | [mas/yr] | -9.324897058 (0.02) | -9.451 (0.04) | -9.451 (0.04) | -9.325 (0.02) | -6.2 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.34 (0.1) | ||||||||
| V magnitude | 15.23 (0.05) | ||||||||
| R magnitude | 15.21 (0.2) | ||||||||
| I magnitude | |||||||||
| J magnitude | 14.39 (0.03) | 14.39 (0.03) | |||||||
| H magnitude | 14.12 (0.04) | 14.12 (0.04) | |||||||
| K magnitude | 14.22 (0.07) | 14.22 (0.07) | |||||||
| u magnitude | 15.28 (0.004) | 15.28 (0.004) | 15.28 (0.004) | 15.27 (0.01) | |||||
| g magnitude | 15.12 (0.003) | 15.12 (0.003) | 15.12 (0.003) | 15.12 (0.01) | |||||
| r magnitude | 15.13 (0.004) | 15.13 (0.004) | 15.13 (0.004) | 15.11 (0.01) | |||||
| i magnitude | 15.16 (0.004) | 15.16 (0.004) | 15.16 (0.004) | 15.15 (0.01) | |||||
| z magnitude | 15.21 (0.005) | 15.21 (0.005) | 15.21 (0.005) | 15.18 (0.02) | |||||
| G magnitude | 15.04 (0.003) | 15.05 (0.0007) | 15.05 | 15.04 (0.003) | |||||
| BP magnitude | 15.14 (0.003) | 15.12 (0.004) | 15.12 | ||||||
| RP magnitude | 14.81 (0.003) | 14.82 (0.002) | 14.82 | ||||||
| Pan g magnitude | 15.19 (0.005) | 15.19 (0.005) | |||||||
| Pan r magnitude | 15.18 (0.004) | 15.18 (0.004) | |||||||
| Pan i magnitude | 15.17 (0.004) | 15.17 (0.004) | |||||||
| Pan z magnitude | 15.26 (0.002) | 15.26 (0.002) | |||||||
| Pan y magnitude | 15.23 (0.006) | 15.23 (0.006) | |||||||
| E(B-V) | 0.032 | ||||||||
* 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.