All names: TIC 354080295, PG 1238+515, UCAC4 707-050995, GALEX J124038.0+511559, WISEA J124038.28+511600.0, uvby98 610070102, WISE J124038.29+511600.1, UBV M 43115, PG1238+515, 2MASS J12403827+5116001, LAMOST J124038.27+511600.2, GEN# +6.10070102, Gaia DR3 1568569889552108800, CHSS 2335, USNO-B1.0 1412-00229127, Gaia DR2 1568569889552108800, FB 105, SBSS 1238+515, Ton 102, Gaia EDR3 1568569889552108800, GSC 03458-02073
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 40 38.29 (0.02) | 12 40 38.26 | 12 40 38.28 (0.02) | ||
| Declination | 51 16 00.00 (0.02) | 51 16 01.30 | 51 16 00.27 (0.02) | ||
| Spectral type | He-sdO | sdO | |||
| Effective temperature | [K] | 42190.0 (180) | |||
| log(g) | [cgs] | 5.72 (0.05) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.07 (0.03) | 1.09 (0.04) | 1.07 (0.03) | |
| Distance | [pc] | 931.19 (28) | 920.47 (38) | 931.19 (28) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 4.327 (0.02) | 4.292 (0.05) | 4.327 (0.02) | |
| Proper motion (declination) | [mas/yr] | -17.553 (0.03) | -17.697 (0.06) | -17.553 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.32 (0.01) | ||||
| V magnitude | 13.63 (0.01) | ||||
| R magnitude | 13.99 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 14.30 (0.03) | 14.30 (0.03) | |||
| H magnitude | 14.41 (0.05) | 14.41 (0.05) | |||
| K magnitude | 14.46 (0.07) | 14.46 (0.07) | |||
| u magnitude | 13.97 (0.005) | ||||
| g magnitude | 13.79 (0.005) | ||||
| r magnitude | |||||
| i magnitude | 15.10 (0.007) | ||||
| z magnitude | 15.12 (0.007) | ||||
| G magnitude | 13.57 (0.003) | 13.58 (0.0005) | 13.57 (0.003) | ||
| BP magnitude | 13.40 (0.003) | 13.32 (0.009) | |||
| RP magnitude | 13.89 (0.004) | 13.89 (0.002) | |||
| Pan g magnitude | 13.43 (0.003) | ||||
| Pan r magnitude | 13.87 (0.004) | ||||
| Pan i magnitude | 14.23 (0.002) | ||||
| Pan z magnitude | 14.52 (0.002) | ||||
| Pan y magnitude | 14.71 (0.008) | ||||
| 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.