All names: GALEX J210901.8+255821, Gaia DR3 1841750421125652864, Gaia DR2 1841750421125652864, WDJ210901.84+255821.12
| Parameter | Unit | Kilic et al. 2025b | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|
| Right ascension | 21 09 01.84 | 21 09 01.84 (0.2) | ||
| Declination | 25 58 21.67 | 25 58 21.12 (0.1) | ||
| Spectral type | DQA | DB: | DB | |
| Effective temperature | [K] | 16052.0 (391) | 15307.0 (952) | |
| log(g) | [cgs] | 9.06 (0.03) | 8.99 (0.06) | |
| Mass | [M☉] | 1.212 (0.01) | 1.183 (0.03) | |
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 7.78 | 7.78 (0.2) | |
| Distance | [pc] | 128.57 | 128.57 (3) | |
| Composition | C | |||
| Proper motion (right ascension) | [mas/yr] | -2.28 (0.2) | ||
| Proper motion (declination) | [mas/yr] | 34.685 (0.1) | ||
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 18.49 (0.003) | 18.49 | 18.49 (0.003) | |
| BP magnitude | 18.44 (0.02) | |||
| RP magnitude | 18.61 (0.03) | |||
| Pan g magnitude | 18.41 (0.008) | |||
| Pan r magnitude | 18.67 (0.006) | |||
| Pan i magnitude | 18.95 (0.007) | |||
| Pan z magnitude | 19.18 (0.007) | |||
| Pan y magnitude | 19.34 (0.06) | |||
| 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.