All names: USNO-B1.0 0974-00190184, J0805+0724, LSPM J0805+0724, Gaia DR3 3097756127294671488, Gaia EDR3 3097756127294671488, WDJ080558.85+072449.19, SDSS J080558.83+072447.8, Gaia DR2 3097756127294671488, SDSS J080558.82+072447.7, SDSS J080558.83+072448.4, NLTT 18937, SDSS J080558.84+072448.5, SDSS J080558.84+072448.4, LP 544-22
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Blouin & Dufour 2019 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 05 58.80 (0.2) | 08 05 58.83 | 08 05 58.80 (0.3) | 08 05 58.80 | 08 05 58.84 (0.2) | 08 05 58.80 | 08 05 58.83 | |||||||
| Declination | 07 24 45.42 (0.2) | 07 24 47.78 | 07 24 45.53 (0.2) | 07 24 45.42 | 07 24 49.18 (0.2) | 07 24 45.53 | 07 24 47.79 | |||||||
| Spectral type | DQ | DQ | DQpec | DQ | DQpec | DQPEC | DQ | |||||||
| Effective temperature | [K] | 5388.0 (20) | 5382.0 (19) | 5313.0 (42) | 5439.0 (85) | 6301.0 (4) | ||||||||
| log(g) | [cgs] | 8.01 (0.03) | 7.98 (0.03) | 7.94 (0.05) | 8.04 (0.04) | 10.00 (0.01) | ||||||||
| Mass | [M☉] | 0.578 (0.02) | 0.556 (0.03) | 0.532 (0.03) | 0.595 (0.04) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 4.3800 | ||||||||||||
| log(H/He) | ||||||||||||||
| log(C/He) | -6.95 | -6.97 | -7.087 (0.07) | |||||||||||
| 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] | 13.08 (0.3) | 12.80 (0.3) | 12.80 (0.4) | 12.80 (0.4) | 13.08 | 13.08 (0.3) | 12.80 (0.4) | ||||||
| Distance | [pc] | 76.47 (2) | 78.12 (2) | 78.13 (2) | 78.13 (2) | 76.47 | 76.47 (2) | 78.13 (2) | ||||||
| Composition | He | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -40.5441383 (0.3) | -40.97476508 (0.6) | -40.544 (0.3) | -40.97476508 | |||||||||
| Proper motion (declination) | [mas/yr] | -235.0648432 (0.2) | -235.6229841 (0.4) | -235.065 (0.2) | -235.6229841 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 19.40 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 18.80 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 18.30 (0.07) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 20.45 (0.06) | 20.43 (0.06) | 20.45 (0.06) | 20.45 (0.06) | 20.35 (0.04) | 20.41 (0.07) | ||||||||
| g magnitude | 19.55 (0.01) | 19.55 (0.01) | 19.55 (0.01) | 19.55 (0.01) | 19.57 (0.03) | |||||||||
| r magnitude | 18.89 (0.01) | 18.89 (0.01) | 18.89 (0.01) | 18.88 (0.01) | 18.89 (0.02) | |||||||||
| i magnitude | 18.69 (0.01) | 18.69 (0.01) | 18.69 (0.01) | 18.69 (0.01) | 18.68 (0.02) | |||||||||
| z magnitude | 18.66 (0.03) | 18.66 (0.03) | 18.66 (0.03) | 18.68 (0.03) | 18.65 (0.03) | |||||||||
| G magnitude | 18.94 (0.04) | 18.98 | 18.94 | 18.94 (0.004) | 18.98 | |||||||||
| BP magnitude | 19.40 (0.04) | 19.42 | 19.42 | |||||||||||
| RP magnitude | 18.39 (0.03) | 18.34 | 18.34 | |||||||||||
| Pan g magnitude | 19.48 (0.008) | 19.48 (0.008) | 19.48 (0.008) | |||||||||||
| Pan r magnitude | 18.89 (0.01) | 18.89 (0.01) | 18.89 (0.01) | |||||||||||
| Pan i magnitude | 18.72 (0.006) | 18.72 (0.005) | 18.72 (0.006) | |||||||||||
| Pan z magnitude | 18.66 (0.01) | 18.66 (0.01) | 18.66 (0.01) | |||||||||||
| Pan y magnitude | 18.72 (0.03) | 18.72 (0.02) | 18.72 (0.03) | |||||||||||
| E(B-V) | 0.002 | |||||||||||||
* 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.