All names: Ton 686, J1259+2754, US 102, CBS 330, SDSS J125934.59+275452.3, OMHR 138326, [BCF91] 284, WDJ125934.61+275452.70, PB 3191, OMHR J125934.71+275454.6, KUV 494-72, A2 287, GALEX J125934.5+275452, Gaia DR2 1460807304669403136, SDSS J125934.58+275451.9, Gaia DR3 1460807304669403136, KUV 12572+2811, SDSS J125934.60+275452.4, Gaia EDR3 1460807304669403136
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 59 34.57 (0.07) | 12 59 34.60 | 12 59 34.57 (0.08) | 12 59 34.57 | 12 59 34.61 (0.07) | 12 59 34.57 | 12 59 34.60 | ||||||
| Declination | 27 54 51.91 (0.06) | 27 54 52.39 | 27 54 51.93 (0.05) | 27 54 51.91 | 27 54 52.70 (0.06) | 27 54 51.93 | 27 54 52.42 | ||||||
| Spectral type | DQ | DQ | DC | DQ | DQ | DC | |||||||
| Effective temperature | [K] | 9134.0 (111) | 9279.0 (67) | 9668.0 (152) | 10373.0 (145) | ||||||||
| log(g) | [cgs] | 7.88 (0.02) | 7.91 (0.02) | 8.04 (0.03) | 9.41 (0.4) | ||||||||
| Mass | [M☉] | 0.507 (0.02) | 0.529 (0.01) | 0.602 (0.02) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.7100 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | -4.8 | -4.86 | |||||||||||
| 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] | 10.29 (0.1) | 10.29 (0.1) | 10.29 (0.1) | 10.29 | 10.29 (0.1) | 10.29 (0.1) | ||||||
| Distance | [pc] | 97.22 (1) | 97.18 (1) | 97.22 (1) | 97.22 | 97.22 (1) | 97.22 (1) | ||||||
| Composition | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -30.22894447 (0.09) | -30.25880422 (0.2) | -30.229 (0.09) | -30.25880422 | ||||||||
| Proper motion (declination) | [mas/yr] | -49.541354 (0.1) | -49.61164765 (0.1) | -49.541 (0.1) | -49.61164765 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.00 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 17.40 (0.03) | ||||||||||||
| H magnitude | 17.48 (0.06) | ||||||||||||
| K magnitude | 17.43 (0.09) | ||||||||||||
| u magnitude | 17.53 (0.01) | 17.53 (0.01) | 17.53 (0.01) | 17.53 (0.01) | 17.55 (0.02) | ||||||||
| g magnitude | 17.38 (0.005) | 17.38 (0.005) | 17.38 (0.005) | 17.41 (0.02) | |||||||||
| r magnitude | 17.50 (0.006) | 17.50 (0.006) | 17.50 (0.006) | 17.50 (0.02) | |||||||||
| i magnitude | 17.66 (0.007) | 17.66 (0.007) | 17.66 (0.007) | 17.64 (0.02) | |||||||||
| z magnitude | 17.81 (0.02) | 17.80 (0.02) | 17.80 (0.02) | 17.80 (0.02) | |||||||||
| G magnitude | 17.41 (0.006) | 17.44 | 17.41 | 17.41 (0.003) | 17.44 | ||||||||
| BP magnitude | 17.46 (0.006) | 17.42 | 17.42 | ||||||||||
| RP magnitude | 17.33 (0.008) | 17.32 | 17.32 | ||||||||||
| Pan g magnitude | 17.46 (0.01) | 17.46 (0.01) | |||||||||||
| Pan r magnitude | 17.50 (0.006) | 17.50 (0.006) | |||||||||||
| Pan i magnitude | 17.68 (0.01) | 17.68 (0.01) | |||||||||||
| Pan z magnitude | 17.84 (0.007) | 17.84 (0.006) | |||||||||||
| Pan y magnitude | 17.96 (0.01) | 17.96 (0.01) | |||||||||||
| E(B-V) | 0.004 | ||||||||||||
* 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.