All names: LBQS 1212+1407, LBQS1212+1407, USNO-B1.0 1038-00197770, GALEX J121523.7+135103, Gaia DR2 3921037277023770752, Gaia EDR3 3921037277023770752, Gaia DR3 3921037277023770752, SDSS J121523.73+135102.2, SDSS J121523.73+135102.3, SDSS J121523.73+135102.30
| Parameter | Unit | Gaia EDR3 | SDSS DR10 | Geier 2020 | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|
| Right ascension | 12 15 23.73 (0.09) | 12 15 23.73 | 12 15 23.75 | 12 15 23.73 (0.09) | ||
| Declination | 13 51 02.28 (0.07) | 13 51 02.29 | 13 51 02.90 | 13 51 02.41 (0.07) | ||
| Spectral type | sdB | DAB | sdB | |||
| Effective temperature | [K] | 28731.0 (1136) | 31034.0 (172) | |||
| log(g) | [cgs] | 5.36 (0.2) | 5.55 (0.04) | |||
| Mass | [M☉] | |||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | -0.16 (0.1) | -0.12 (0.2) | |||
| Distance | [pc] | |||||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -6.717660004 (0.1) | -6.883 (0.3) | -6.718 (0.1) | ||
| Proper motion (declination) | [mas/yr] | -7.581212481 (0.08) | -7.562 (0.2) | -7.581 (0.08) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | 17.40 | |||||
| V magnitude | ||||||
| R magnitude | 17.30 | |||||
| I magnitude | ||||||
| J magnitude | 17.13 (0.03) | |||||
| H magnitude | 16.52 (0.02) | |||||
| K magnitude | 16.11 (0.03) | |||||
| u magnitude | 16.98 (0.007) | 16.98 (0.007) | 17.04 (0.02) | 16.98 (0.007) | ||
| g magnitude | 17.03 (0.004) | 17.03 (0.004) | 17.11 (0.03) | 17.03 (0.004) | ||
| r magnitude | 17.38 (0.005) | 17.38 (0.005) | 17.54 (0.03) | 17.38 (0.005) | ||
| i magnitude | 17.53 (0.007) | 17.53 (0.007) | 17.71 (0.03) | 17.53 (0.007) | ||
| z magnitude | 17.67 (0.02) | 17.67 (0.02) | 17.82 (0.03) | 17.67 (0.02) | ||
| G magnitude | 17.38 (0.01) | 17.37 (0.002) | 17.38 (0.003) | |||
| BP magnitude | 17.20 (0.01) | 17.12 (0.01) | ||||
| RP magnitude | 17.30 (0.01) | 17.27 (0.02) | ||||
| Pan g magnitude | 17.13 (0.006) | |||||
| Pan r magnitude | 17.45 (0.007) | |||||
| Pan i magnitude | 17.70 (0.01) | |||||
| Pan z magnitude | 17.81 (0.02) | |||||
| Pan y magnitude | 17.95 (0.03) | |||||
| 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.