All names: PG0908+281, LAMOST J091136.86+275240.2, Gaia DR2 698115121143554176, Gaia DR3 698115121143554176, SDSS J091136.86+275240.2, PG 0908+281, GALEX J091136.8+275239, LAMOST J091136.87+275240.3, Gaia EDR3 698115121143554176, Ton 390
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Simbad |
|---|---|---|---|---|
| Right ascension | 09 11 36.87 (0.08) | 09 11 36.85 | 09 11 36.86 (0.08) | |
| Declination | 27 52 40.23 (0.05) | 27 52 40.40 | 27 52 40.27 (0.05) | |
| Spectral type | sdO | sdB | ||
| Effective temperature | [K] | 46750.0 (1780) | ||
| log(g) | [cgs] | 5.72 (0.03) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.30 (0.1) | -0.16 (0.2) | 0.30 (0.1) |
| Distance | [pc] | 3331.11 (1202) | 3331.11 (1202) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.39 (0.1) | 3.396 (0.2) | 3.39 (0.1) |
| Proper motion (declination) | [mas/yr] | -2.113 (0.07) | -1.95 (0.1) | -2.113 (0.07) |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.90 | |||
| V magnitude | 17.24 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 16.30 (0.006) | 16.31 (0.01) | ||
| g magnitude | 16.70 (0.004) | 16.72 (0.02) | ||
| r magnitude | 17.23 (0.005) | 17.24 (0.01) | ||
| i magnitude | 17.60 (0.007) | 17.61 (0.01) | ||
| z magnitude | 17.94 (0.02) | 17.95 (0.02) | ||
| G magnitude | 16.97 (0.003) | 17.00 (0.002) | 16.97 (0.003) | |
| BP magnitude | 16.81 (0.007) | 16.74 (0.01) | ||
| RP magnitude | 17.31 (0.01) | 17.31 (0.01) | ||
| Pan g magnitude | 16.78 (0.003) | |||
| Pan r magnitude | 17.26 (0.005) | |||
| Pan i magnitude | 17.63 (0.006) | |||
| Pan z magnitude | 17.93 (0.007) | |||
| Pan y magnitude | 18.14 (0.01) | |||
| E(B-V) | ||||
* 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.