All names: SDSSJ202527.22+572904.3, SDSS J202527.21+572904.0, UCAC4 738-068707, Gaia DR3 2187826589350022784, SDSS J202527.22+572904.3, TIC 352550826, Gaia DR2 2187826589350022784, 2MASS J20252721+5729040, GALEX J202527.2+572903
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 25 27.21 | 20 25 27.21 (0.02) | ||
| Declination | 57 29 04.05 | 57 29 04.01 (0.01) | ||
| 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] | 0.33 (0.03) | 0.32 (0.02) | |
| Distance | [pc] | 3058.10 (250) | 3083.56 (158) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -4.821 (0.06) | -4.623 (0.03) | |
| Proper motion (declination) | [mas/yr] | -4.153 (0.05) | -4.118 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.01 (0.04) | |||
| V magnitude | 12.86 (0.04) | |||
| R magnitude | 12.96 (0.07) | |||
| I magnitude | ||||
| J magnitude | 12.61 (0.03) | 12.61 (0.03) | ||
| H magnitude | 12.58 (0.03) | 12.58 (0.03) | ||
| K magnitude | 12.63 (0.03) | 12.63 (0.03) | ||
| u magnitude | 14.12 (0.006) | 14.12 (0.006) | ||
| g magnitude | 14.66 (0.01) | 12.82 (0.03) | ||
| r magnitude | 14.72 (0.01) | 12.89 (0.07) | ||
| i magnitude | 14.91 (0.01) | 13.03 (0.01) | ||
| z magnitude | 13.57 (0.005) | 13.57 (0.005) | ||
| G magnitude | 12.82 (0.0003) | 12.81 (0.003) | ||
| BP magnitude | 12.85 (0.002) | |||
| RP magnitude | 12.67 (0.001) | |||
| Pan g magnitude | 13.16 | |||
| Pan r magnitude | 13.17 | |||
| Pan i magnitude | 13.20 | |||
| Pan z magnitude | 13.14 (0.004) | |||
| Pan y magnitude | 13.19 (0.002) | |||
| E(B-V) | 0.327 | |||
* 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.