All names: GALEX J120341.1+253111, PG1201+258, TIC 4632676, Gaia DR2 4006102059258774272, LAMOST J120341.17+253111.4, SDSS J120341.21+253111.4, Gaia DR3 4006102059258774272, 2MASS J12034120+2531115, Ton 74, PG 1201+258
| Parameter | Unit | Geier 2020 | Stilism | Guo et al. 2015 | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 03 41.22 | 12 03 41.21 (0.05) | |||
| Declination | 25 31 12.42 | 25 31 11.54 (0.04) | |||
| Spectral type | sdOB | sdB? | sdB+dM | ||
| Effective temperature | [K] | 35440.0 (189) | |||
| log(g) | [cgs] | 5.92 (0.04) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.69 (0.09) | 0.73 (0.06) | ||
| Distance | [pc] | 1446.55 (186) | 1375.89 (121) | ||
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 1.36 (0.2) | 0.427 (0.06) | ||
| Proper motion (declination) | [mas/yr] | -22.246 (0.09) | -22.313 (0.05) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.10 | ||||
| V magnitude | 15.16 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.13 (0.04) | 15.13 (0.04) | |||
| H magnitude | 14.82 (0.06) | 14.82 (0.06) | |||
| K magnitude | 14.72 (0.09) | 14.72 (0.09) | |||
| u magnitude | 14.83 (0.005) | 14.83 (0.005) | |||
| g magnitude | 15.02 (0.004) | 15.02 (0.004) | |||
| r magnitude | 15.49 (0.008) | 15.49 (0.008) | |||
| i magnitude | 15.53 (0.005) | 15.53 (0.005) | |||
| z magnitude | 15.60 (0.006) | 15.60 (0.006) | |||
| G magnitude | 15.13 (0.0008) | 15.12 (0.003) | |||
| BP magnitude | 15.00 (0.007) | ||||
| RP magnitude | 15.19 (0.004) | ||||
| Pan g magnitude | 15.03 (0.002) | ||||
| Pan r magnitude | 15.32 (0.004) | ||||
| Pan i magnitude | 15.53 (0.004) | ||||
| Pan z magnitude | 15.66 (0.003) | ||||
| Pan y magnitude | 15.72 (0.005) | ||||
| E(B-V) | 0.018 | ||||
* 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.