All names: 2MASS J01571114+2039178, UCAC2 39084949, SDSS J015711.14+203917.6, PG0154+204, USNO-B1.0 1106-00022328, UCAC4 554-003591, Gaia DR2 97013488627139328, WISEA J015711.16+203917.6, WISE J015711.14+203917.6, TIC 60960969, Gaia DR3 97013488627139328, LAMOST J015711.14+203917.8, PG 0154+204
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 01 57 11.11 | 01 57 11.14 (0.05) | ||
| Declination | 20 39 17.87 | 20 39 17.89 (0.04) | ||
| Spectral type | sdOB | sdBO | ||
| Effective temperature | [K] | 35757.0 (332) | ||
| log(g) | [cgs] | 5.85 (0.06) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.65 (0.07) | 0.59 (0.05) | |
| Distance | [pc] | 1546.55 (163) | 1694.05 (135) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 17.337 (0.1) | 17.197 (0.06) | |
| Proper motion (declination) | [mas/yr] | -7.316 (0.1) | -7.269 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.10 | |||
| V magnitude | ||||
| R magnitude | 15.74 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.99 (0.09) | 15.99 (0.09) | ||
| H magnitude | 16.00 (0.2) | 16.00 (0.2) | ||
| K magnitude | 16.48 | |||
| u magnitude | 14.90 (0.004) | |||
| g magnitude | 15.14 (0.002) | |||
| r magnitude | 15.55 (0.003) | |||
| i magnitude | 15.85 (0.003) | |||
| z magnitude | 16.05 (0.009) | |||
| G magnitude | 15.39 (0.001) | 15.38 (0.003) | ||
| BP magnitude | 15.23 (0.007) | |||
| RP magnitude | 15.59 (0.008) | |||
| Pan g magnitude | 15.23 (0.004) | |||
| Pan r magnitude | 15.59 (0.002) | |||
| Pan i magnitude | 15.92 (0.002) | |||
| Pan z magnitude | 16.17 (0.002) | |||
| Pan y magnitude | 16.33 (0.006) | |||
| E(B-V) | 0.075 | |||
* 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.