All names: TIC 469415546, 2MASS J20300151+5928102, SDSSJ203001.51+592810.2, Gaia DR3 2188461862254280960, SDSS J203001.53+592810.2, UCAC4 748-064531, GALEX J203001.5+592810, SDSS J203001.51+592810.2, Gaia DR2 2188461862254280960
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 30 01.44 | 20 30 01.52 (0.02) | ||
| Declination | 59 28 10.71 | 59 28 10.26 (0.02) | ||
| Spectral type | sd | sd | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.14 (0.02) | 1.17 (0.02) | |
| Distance | [pc] | 875.81 (18) | 856.46 (14) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 6.721 (0.05) | 6.642 (0.03) | |
| Proper motion (declination) | [mas/yr] | -4.338 (0.04) | -4.198 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | 12.59 (0.06) | |||
| I magnitude | ||||
| J magnitude | 11.80 (0.02) | 11.80 (0.02) | ||
| H magnitude | 11.72 (0.03) | 11.72 (0.03) | ||
| K magnitude | 11.61 (0.02) | 11.61 (0.02) | ||
| u magnitude | 15.16 (0.006) | 15.17 (0.006) | ||
| g magnitude | 13.27 (0.003) | 13.25 (0.003) | ||
| r magnitude | 12.63 (0.001) | 12.63 (0.001) | ||
| i magnitude | 12.81 (0.003) | 12.80 (0.003) | ||
| z magnitude | 13.83 (0.006) | 13.81 (0.006) | ||
| G magnitude | 12.55 (0.0003) | 12.54 (0.003) | ||
| BP magnitude | 12.75 (0.0009) | |||
| RP magnitude | 12.20 (0.0008) | |||
| Pan g magnitude | 14.68 (0) | |||
| Pan r magnitude | ||||
| Pan i magnitude | 15.35 (0.002) | |||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.268 | |||
* 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.