All names: USNO-B1.0 1171-00188968, Gaia EDR3 683635407703226752, SDSS J081115.08+270621.8, Gaia DR2 683635407703226752, SDSS J081115.09+270621.8, SDSS J081115.08+270621.7, GALEX J081115.1+270622, SDSS J081115.09+270621.7, Gaia DR3 683635407703226752, WD 0808+272
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Eisenstein et al. 2006 | Hugelmeyer et al. 2006 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 11 15.08 (0.1) | 08 11 15.09 | 08 11 15.08 (0.2) | 08 11 15.09 | 08 11 15.09 (0.1) | 08 11 14.69 | 08 11 15.09 | ||||||
| Declination | 27 06 21.66 (0.1) | 27 06 21.80 | 27 06 21.66 (0.1) | 27 06 21.77 | 27 06 21.82 (0.1) | 27 06 20.52 | 27 06 21.78 | ||||||
| Spectral type | DO | DO | DO | DO | DO | DO | DB | ||||||
| Effective temperature | [K] | 46603.0 (213) | 47500.0 (100) | 48000.0 (300) | 47682.0 (316) | ||||||||
| log(g) | [cgs] | 7.73 (0.06) | 8.01 (0.04) | 8.00 (0.04) | 7.70 (0.1) | ||||||||
| Mass | [M☉] | 0.52 (0.02) | 0.64 | ||||||||||
| log(Luminosity) | [L☉] | 0.05 (0.04) | |||||||||||
| Cooling age | [Gyr] | 0.0023 (0.0004) | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| 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] | 1.43 (0.2) | 1.42 (0.2) | 1.43 (0.2) | |||||||||
| Distance | [pc] | 699.36 (76) | 701.89 (103) | 699.35 (76) | |||||||||
| Composition | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -4.953422837 (0.2) | -4.906273418 (0.3) | -4.953 (0.2) | |||||||||
| Proper motion (declination) | [mas/yr] | -10.38089527 (0.1) | -10.51430476 (0.2) | -10.381 (0.1) | |||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.65 | ||||||||||||
| V magnitude | 18.38 | ||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 19.30 (0.1) | ||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 17.73 (0.01) | 17.75 (0.02) | 17.73 (0.01) | 17.74 | 17.73 (0.02) | ||||||||
| g magnitude | 18.08 (0.006) | 18.12 (0.01) | 18.07 (0.006) | 18.11 | 18.10 (0.01) | ||||||||
| r magnitude | 18.63 (0.009) | 18.67 (0.02) | 18.63 (0.009) | 18.66 | 18.66 (0.02) | ||||||||
| i magnitude | 18.96 (0.01) | 19.00 (0.02) | 18.96 (0.01) | 18.99 | 18.99 (0.02) | ||||||||
| z magnitude | 19.37 (0.08) | 19.38 (0.07) | 19.37 (0.08) | 19.37 | 19.35 (0.08) | ||||||||
| G magnitude | 18.37 (0.01) | 18.41 | 18.37 (0.003) | ||||||||||
| BP magnitude | 18.21 (0.01) | 18.13 | |||||||||||
| RP magnitude | 18.82 (0.06) | 18.66 | |||||||||||
| Pan g magnitude | 18.18 (0.005) | ||||||||||||
| Pan r magnitude | 18.63 (0.006) | ||||||||||||
| Pan i magnitude | 19.02 (0.009) | ||||||||||||
| Pan z magnitude | 19.33 (0.02) | ||||||||||||
| Pan y magnitude | 19.53 (0.06) | ||||||||||||
| E(B-V) | 0.030 | ||||||||||||
* 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.