All names: USNO-A2.0 1275-07311834, SDSS J083456.97+422053.1, USNO-B1.0 1323-00237139, SDSSJ083456.97+422053.1, Gaia DR3 915056977280708096, GALEX J083456.9+422053, US 1269, Gaia DR2 915056977280708096, KUV 08316+4231
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 34 56.98 | 08 34 56.99 (0.06) | ||
| Declination | 42 20 53.12 | 42 20 53.10 (0.04) | ||
| Spectral type | sdB+MS | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.00 (0.1) | 0.03 (0.08) | |
| Distance | [pc] | 303030.30 (9044995) | 32051.28 (85573) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.154 (0.1) | -0.045 (0.08) | |
| Proper motion (declination) | [mas/yr] | -1.265 (0.1) | -1.273 (0.07) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.90 | |||
| V magnitude | 16.63 | |||
| R magnitude | 17.10 | |||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 17.66 (0.01) | 17.69 (0.01) | ||
| g magnitude | 17.00 (0.004) | 17.00 (0.007) | ||
| r magnitude | 17.37 (0.005) | 17.38 (0.01) | ||
| i magnitude | 17.50 (0.006) | 17.50 (0.006) | ||
| z magnitude | 17.74 (0.02) | 17.72 (0.02) | ||
| G magnitude | 17.19 (0.001) | 17.17 (0.003) | ||
| BP magnitude | 17.11 (0.008) | |||
| RP magnitude | 17.26 (0.008) | |||
| Pan g magnitude | 17.07 (0.006) | |||
| Pan r magnitude | 17.32 (0.006) | |||
| Pan i magnitude | 17.57 (0.004) | |||
| Pan z magnitude | 17.74 (0.01) | |||
| Pan y magnitude | 17.85 (0.03) | |||
| E(B-V) | 0.030 | |||
* 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.