All names: Gaia EDR3 663815301863336448, Gaia DR2 663815301863336448, GALEX J082502.3+200921, USNO-B1.0 1101-00159163, J0825+2009, SDSS J082502.19+200921.1, SDSS J082502.20+200921.1, Gaia DR3 663815301863336448
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Coutu et al. 2019 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 25 02.18 (0.4) | 08 25 02.20 | 08 25 02.19 (0.5) | 08 25 02.20 (0.4) | 08 25 02.20 | ||||
| Declination | 20 09 21.01 (0.3) | 20 09 21.09 | 20 09 21.01 (0.4) | 20 09 21.09 (0.3) | 20 09 21.13 | ||||
| Spectral type | DZ | DZ | DZ | DZ | |||||
| Effective temperature | [K] | 8457.0 (397) | 10145.0 (78) | ||||||
| log(g) | [cgs] | 8.00 | 9.01 (0.7) | ||||||
| Mass | [M☉] | 0.5758 | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | 0.9620 | |||||||
| log(H/He) | <-5.2137 | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | -9.8884 (0.2) | ||||||||
| log(Ca/H) | |||||||||
| log(N/He) | |||||||||
| log(O/He) | |||||||||
| log(Na/He) | |||||||||
| log(Mg/He) | |||||||||
| log(Al/He) | |||||||||
| log(Si/He) | |||||||||
| log(P/He) | |||||||||
| log(S/He) | |||||||||
| log(Cl/He) | |||||||||
| log(Sc/He) | |||||||||
| log(Ti/He) | |||||||||
| log(V/He) | |||||||||
| log(Cr/He) | |||||||||
| log(Mn/He) | |||||||||
| log(Fe/He) | |||||||||
| log(Co/He) | |||||||||
| log(Ni/He) | |||||||||
| log(Cu/He) | |||||||||
| log(Zn/He) | |||||||||
| log(Ga/He) | |||||||||
| log(Ge/He) | |||||||||
| log(Sr/He) | |||||||||
| Parallax | [mas] | 3.04 (0.5) | 3.68 | 3.68 (0.6) | 3.04 (0.5) | ||||
| Distance | [pc] | 329.15 (52) | 271.62 (44) | 271.62 (44) | 329.15 (52) | ||||
| Composition | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | -17.01743833 (0.5) | -15.82479592 (1) | -17.017 (0.5) | |||||
| Proper motion (declination) | [mas/yr] | -4.770514471 (0.3) | -4.908884437 (0.8) | -4.771 (0.3) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 19.90 | ||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 20.35 (0.06) | 20.34 (0.06) | |||||||
| g magnitude | 20.06 (0.02) | 20.05 (0.02) | |||||||
| r magnitude | 20.02 (0.03) | 20.01 (0.02) | |||||||
| i magnitude | 20.14 (0.04) | 20.14 (0.03) | |||||||
| z magnitude | 20.38 (0.2) | 20.35 (0.2) | |||||||
| G magnitude | 20.00 (0.05) | 20.05 | 20.00 (0.005) | ||||||
| BP magnitude | 20.07 (0.05) | 19.91 | |||||||
| RP magnitude | 19.68 (0.1) | 19.69 | |||||||
| Pan g magnitude | 20.04 (0.01) | ||||||||
| Pan r magnitude | 20.05 (0.01) | ||||||||
| Pan i magnitude | 20.12 (0.02) | ||||||||
| Pan z magnitude | 20.28 (0.06) | ||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.019 | ||||||||
* 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.