All names: Gaia EDR3 1218662305561020672, Gaia DR2 1218662305561020672, GALEX J155710.0+234509, Gaia DR3 1218662305561020672, LAMOST J155709.96+234509.4, SDSS J155709.93+234509.8
| Parameter | Unit | Gaia EDR3 | Stilism | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|
| Right ascension | 15 57 09.97 (0.03) | 15 57 09.97 | 15 57 09.92 (0.03) | ||
| Declination | 23 45 09.10 (0.03) | 23 45 09.10 | 23 45 09.99 (0.03) | ||
| Spectral type | DB | DB | |||
| Effective temperature | [K] | 28300.0 (525) | |||
| log(g) | [cgs] | 7.86 (0.02) | |||
| Mass | [M☉] | 0.542 (0.01) | |||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 5.62 (0.05) | 5.62 | 5.62 (0.05) | |
| Distance | [pc] | 178.07 (2) | 178.07 | 178.07 (2) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 40.525 (0.04) | 40.525 (0.04) | ||
| Proper motion (declination) | [mas/yr] | -55.371 (0.05) | -55.371 (0.05) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 15.93 (0.005) | ||||
| g magnitude | 16.17 (0.004) | ||||
| r magnitude | 16.59 (0.005) | ||||
| i magnitude | 16.87 (0.005) | ||||
| z magnitude | 17.23 (0.01) | ||||
| G magnitude | 16.37 (0.003) | 16.37 | 16.37 (0.003) | ||
| BP magnitude | 16.24 (0.004) | ||||
| RP magnitude | 16.56 (0.008) | ||||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.048 | ||||
* 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.