All names: WD 0819+487, SDSS J082307.80+483316.6, LP 163-167, WDJ082307.82+483316.66, USNO-B1.0 1385-00194068, LSPM J0823+4833, SDSS J082307.81+483316.6, SDSS J082307.80+483316.5, J0823+4833, Gaia DR2 930966979254089472, NLTT 19396, Gaia DR3 930966979254089472, Gaia EDR3 930966979254089472, GALEX J082307.5+483317
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 23 07.48 (0.08) | 08 23 07.81 | 08 23 07.49 (0.1) | 08 23 07.48 | 08 23 07.82 (0.08) | 08 23 07.49 | 08 23 07.63 | |||||||
| Declination | 48 33 15.53 (0.06) | 48 33 16.61 | 48 33 15.57 (0.08) | 48 33 15.53 | 48 33 16.66 (0.06) | 48 33 15.57 | 48 33 14.40 | |||||||
| Spectral type | DA | DA | DA | DA7.9 | DA | |||||||||
| Effective temperature | [K] | 6240.0 (26) | 6126.0 | 5865.0 | 6329.0 (61) | |||||||||
| log(g) | [cgs] | 8.31 (0.01) | 8.26 | 8.12 | 8.33 (0.02) | |||||||||
| Mass | [M☉] | 0.786 (0.009) | 0.755 | 0.645 | 0.804 (0.02) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 4.1700 | 3.8680 | 3.8010 | ||||||||||
| log(H/He) | ||||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | ||||||||||||||
| log(Ca/H) | ||||||||||||||
| log(C/H) | ||||||||||||||
| log(N/H) | ||||||||||||||
| log(O/H) | ||||||||||||||
| log(Na/H) | ||||||||||||||
| log(Mg/H) | ||||||||||||||
| log(Al/H) | ||||||||||||||
| log(Si/H) | ||||||||||||||
| log(P/H) | ||||||||||||||
| log(S/H) | ||||||||||||||
| log(Sc/H) | ||||||||||||||
| log(Ti/H) | ||||||||||||||
| log(Cr/H) | ||||||||||||||
| log(Mn/H) | ||||||||||||||
| log(Fe/H) | ||||||||||||||
| log(Ni/H) | ||||||||||||||
| Parallax | [mas] | 21.39 (0.1) | 21.46 (0.1) | 21.46 (0.1) | 21.39 | 21.39 (0.1) | 21.46 (0.1) | |||||||
| Distance | [pc] | 46.76 (0.2) | 46.60 (0.3) | 46.60 (0.3) | 46.76 | 46.76 (0.2) | 46.60 (0.3) | |||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -211.5033597 (0.1) | -211.4682212 (0.2) | -211.503 (0.1) | -211.4682212 | |||||||||
| Proper motion (declination) | [mas/yr] | -70.81541754 (0.08) | -70.90692268 (0.2) | -70.815 (0.08) | -70.90692268 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 18.20 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 17.40 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 16.81 (0.02) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 18.76 (0.02) | 18.76 (0.02) | 18.76 (0.02) | 18.76 (0.02) | 18.53 | |||||||||
| g magnitude | 17.95 (0.006) | 17.96 (0.006) | 17.96 (0.006) | 17.79 | ||||||||||
| r magnitude | 17.65 (0.006) | 17.66 (0.006) | 17.66 (0.006) | 17.54 | ||||||||||
| i magnitude | 17.54 (0.007) | 17.55 (0.007) | 17.55 (0.007) | 17.44 | ||||||||||
| z magnitude | 17.52 (0.02) | 17.53 (0.01) | 17.53 (0.01) | 17.46 | ||||||||||
| G magnitude | 17.66 (0.01) | 17.68 | 17.66 | 17.66 (0.003) | 17.68 | |||||||||
| BP magnitude | 17.90 (0.01) | 17.92 | 17.92 | |||||||||||
| RP magnitude | 17.23 (0.008) | 17.22 | 17.22 | |||||||||||
| Pan g magnitude | 17.95 (0.007) | 17.95 (0.006) | ||||||||||||
| Pan r magnitude | 17.66 (0.005) | 17.66 (0.004) | ||||||||||||
| Pan i magnitude | 17.57 (0.004) | 17.57 (0.004) | ||||||||||||
| Pan z magnitude | 17.55 (0.006) | 17.55 (0.006) | ||||||||||||
| Pan y magnitude | 17.52 (0.02) | 17.52 (0.01) | ||||||||||||
| E(B-V) | 0.001 | |||||||||||||
* 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.