All names: SDSS J085506.63+063904.7, WD 0852+068, J0855+0639, USNO-B1.0 0966-00175578, Gaia EDR3 584402318633098624, WDJ085506.65+063904.58, Gaia DR3 584402318633098624, SDSS J085506.62+063904.7, LSPM J0855+0639, Gaia DR2 584402318633098624, GALEX J085506.5+063905
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Koester et al. 2006 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 55 06.49 (0.09) | 08 55 06.62 | 08 55 06.65 | 08 55 06.50 (0.1) | 08 55 06.49 | 08 55 06.65 (0.09) | 08 55 06.50 | 08 55 06.62 | 08 55 06.48 | 08 55 06.62 | |||||||
| Declination | 06 39 05.42 (0.04) | 06 39 04.70 | 06 39 04.58 | 06 39 05.40 (0.08) | 06 39 05.42 | 06 39 04.58 (0.04) | 06 39 05.40 | 06 39 04.71 | 06 39 00.72 | 06 39 04.71 | |||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | ||||||
| Effective temperature | [K] | 7097.0 (40) | 7297.0 (34) | 7273.0 (142) | 7337.0 | 7074.0 (52) | 10084.0 (14) | 10084.0 (14) | |||||||||
| log(g) | [cgs] | 7.92 (0.01) | 7.96 (0.02) | 7.96 | 8.00 (0) | 7.92 (0.02) | 8.37 (0.3) | 9.62 (0.4) | |||||||||
| Mass | [M☉] | 0.529 (0.01) | 0.552 (0.01) | 0.5533 | 0.527 (0.01) | ||||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||
| Cooling age | [Gyr] | 1.3900 | 1.3500 | ||||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | -6.21 | -6.04 | -6.0793 (0.05) | -5.99 (0.01) | |||||||||||||
| 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] | 13.26 (0.1) | 13.08 (0.2) | 13.08 | 13.08 (0.2) | 13.26 | 13.26 (0.1) | 13.08 (0.2) | |||||||||
| Distance | [pc] | 75.42 (0.7) | 76.45 (1) | 76.44 (1) | 76.44 (1) | 75.42 | 75.42 (0.7) | 76.44 (1) | |||||||||
| Composition | He | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -144.2653325 (0.1) | -144.3920671 (0.3) | -144.265 (0.1) | -144.392 | -142.0 | |||||||||||
| Proper motion (declination) | [mas/yr] | 52.60372831 (0.09) | 52.68895014 (0.2) | 52.604 (0.09) | 52.689 | 48.4 | |||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 17.40 | ||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | 17.50 | ||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 17.36 (0.02) | 17.37 (0.02) | |||||||||||||||
| H magnitude | 17.27 (0.05) | 17.27 (0.05) | |||||||||||||||
| K magnitude | 17.30 (0.06) | 17.30 (0.06) | |||||||||||||||
| u magnitude | 18.23 (0.01) | 18.19 (0.01) | 18.23 (0.01) | 18.21 (0.01) | 18.21 (0.02) | 18.21 | 18.22 (0.02) | ||||||||||
| g magnitude | 17.84 (0.006) | 17.84 (0.006) | 17.84 (0.006) | 17.84 (0.02) | 17.84 | 17.86 (0.02) | |||||||||||
| r magnitude | 17.75 (0.006) | 17.75 (0.006) | 17.74 (0.006) | 17.76 (0.02) | 17.76 | 17.76 (0.02) | |||||||||||
| i magnitude | 17.77 (0.008) | 17.77 (0.008) | 17.76 (0.007) | 17.78 (0.02) | 17.78 | 17.79 (0.02) | |||||||||||
| z magnitude | 17.85 (0.02) | 17.85 (0.02) | 17.89 (0.02) | 17.88 (0.03) | 17.88 | 17.87 (0.03) | |||||||||||
| G magnitude | 17.71 (0.01) | 17.74 | 17.71 | 17.71 (0.003) | 17.74 | ||||||||||||
| BP magnitude | 17.85 (0.01) | 17.83 | 17.83 | ||||||||||||||
| RP magnitude | 17.47 (0.009) | 17.47 | 17.47 | ||||||||||||||
| Pan g magnitude | 17.85 (0.005) | 17.85 (0.006) | |||||||||||||||
| Pan r magnitude | 17.75 (0.006) | 17.75 (0.005) | |||||||||||||||
| Pan i magnitude | 17.80 (0.004) | 17.80 (0.005) | |||||||||||||||
| Pan z magnitude | 17.88 (0.004) | 17.88 (0.004) | |||||||||||||||
| Pan y magnitude | 17.93 (0.02) | 17.93 (0.02) | |||||||||||||||
| E(B-V) | 0.003 | ||||||||||||||||
* 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.