All names: SDSSJ044715.48+203958.2, UCAC4 554-010642, Gaia DR3 3411847601045302144, 2MASS J04471549+2039584, LAMOST J044715.48+203958.2, GALEX J044715.5+203958, SDSS J044715.48+203958.2, Gaia DR2 3411847601045302144
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 47 15.48 | 04 47 15.48 (0.03) | ||
| Declination | 20 39 58.23 | 20 39 58.27 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 30250.0 (700) | ||
| log(g) | [cgs] | 5.51 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.23 (0.05) | 1.21 (0.04) | |
| Distance | [pc] | 815.99 (35) | 826.72 (27) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.188 (0.1) | -2.079 (0.05) | |
| Proper motion (declination) | [mas/yr] | -9.072 (0.06) | -9.118 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.69 (0.07) | |||
| V magnitude | 15.56 (0.03) | |||
| R magnitude | 15.56 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.43 (0.05) | 15.43 (0.05) | ||
| H magnitude | 15.48 (0.1) | 15.48 (0.1) | ||
| K magnitude | 15.79 (0.2) | 15.79 (0.2) | ||
| u magnitude | 15.71 (0.005) | 15.71 (0.005) | ||
| g magnitude | 15.54 (0.004) | 15.56 (0.05) | ||
| r magnitude | 15.61 (0.004) | 15.62 (0.06) | ||
| i magnitude | 15.72 (0.004) | 15.74 (0.2) | ||
| z magnitude | 15.85 (0.006) | 15.85 (0.006) | ||
| G magnitude | 15.55 (0.0006) | 15.53 (0.003) | ||
| BP magnitude | 15.57 (0.005) | |||
| RP magnitude | 15.42 (0.002) | |||
| Pan g magnitude | 15.58 (0.002) | |||
| Pan r magnitude | 15.63 (0.002) | |||
| Pan i magnitude | 15.76 (0.002) | |||
| Pan z magnitude | 15.87 (0.003) | |||
| Pan y magnitude | 15.95 (0.003) | |||
| E(B-V) | 0.354 | |||
* 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.