All names: 2MASS J09393650+4425004, FBS 0936+446, Gaia DR3 820883909442478336, FBS B 263, Gaia DR2 820883909442478336, FBS0936+446, TIC 20139366, US 808, GALEX J093936.5+442500
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 09 39 36.52 | 09 39 36.51 (0.02) | ||
| Declination | 44 25 02.00 | 44 25 00.51 (0.02) | ||
| Spectral type | sd | sdBO | ||
| 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] | 0.10 (0.05) | 0.09 (0.03) | |
| Distance | [pc] | 10070.49 (5537) | 11013.22 (4197) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.812 (0.07) | -1.739 (0.03) | |
| Proper motion (declination) | [mas/yr] | -0.85 (0.07) | -0.743 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.40 | |||
| V magnitude | 15.46 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.51 (0.06) | 15.51 (0.06) | ||
| H magnitude | 15.54 (0.2) | 15.54 (0.2) | ||
| K magnitude | 15.27 | |||
| u magnitude | 15.89 (0.006) | |||
| g magnitude | 15.18 (0.005) | |||
| r magnitude | 15.51 (0.005) | |||
| i magnitude | 15.75 (0.005) | |||
| z magnitude | 15.97 (0.007) | |||
| G magnitude | 15.39 (0.0005) | 15.36 (0.003) | ||
| BP magnitude | 15.30 (0.004) | |||
| RP magnitude | 15.44 (0.002) | |||
| Pan g magnitude | 15.23 (0.005) | |||
| Pan r magnitude | 15.53 (0.004) | |||
| Pan i magnitude | 15.80 (0.002) | |||
| Pan z magnitude | 15.97 (0.006) | |||
| Pan y magnitude | 16.07 (0.02) | |||
| E(B-V) | 0.019 | |||
* 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.