All names: USNO-B1.0 1101-00166576, NLTT 20801, Gaia EDR3 684598618544000384, LP 426-49, WD 0859+203, SDSS J090208.40+201049.9, GALEX J090208.3+201051, 09021+2010, Gaia DR2 684598618544000384, WDJ090208.37+201051.57, SDSS J090208.41+201049.9, Gaia DR3 684598618544000384, PM J09021+2010, J0902+2010, [VV2010] J090208.4+201049, SDSS J090208.41+201050.0, LSPM J0902+2010
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin & Dufour 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 02 08.48 (0.1) | 09 02 08.41 | 09 02 08.47 (0.1) | 09 02 08.47 (0.1) | 09 02 08.48 | 09 02 08.37 (0.1) | 09 02 08.47 | 09 02 06.14 | 09 02 08.41 | |||||||||
| Declination | 20 10 46.30 (0.07) | 20 10 49.97 | 20 10 46.46 (0.09) | 20 10 46.46 (0.09) | 20 10 46.30 | 20 10 51.58 (0.07) | 20 10 46.46 | 20 10 45.12 | 20 10 49.95 | |||||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | ||||||
| Effective temperature | [K] | 5372.0 (7) | 5487.0 (7) | 5499.0 (110) | 5010.0 (34) | 5635.0 (20) | 6301.0 (6) | |||||||||||
| log(g) | [cgs] | 8.18 (0.005) | 8.23 (0.008) | 8.22 (0.02) | 8.00 (0) | 8.30 (0.009) | 10.00 (0.005) | |||||||||||
| Mass | [M☉] | 0.685 (0.005) | 0.718 (0.007) | 0.713 (0.01) | 0.57 (0.1) | 0.767 (0.008) | ||||||||||||
| log(Luminosity) | [L☉] | -4.05 | ||||||||||||||||
| Cooling age | [Gyr] | 5.9600 | ||||||||||||||||
| log(H/He) | ||||||||||||||||||
| log(C/He) | -5.59 | -5.51 | -5.367 (0.05) | -6.63 | ||||||||||||||
| 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] | 26.12 (0.1) | 26.12 (0.1) | 25.92 (0.2) | 25.92 (0.2) | 25.92 (0.2) | 25.92 (0.2) | 26.12 | 26.12 (0.1) | 25.92 (0.2) | ||||||||
| Distance | [pc] | 38.28 (0.2) | 38.28 (0.2) | 38.58 (0.3) | 38.59 (0.3) | 38.59 (0.3) | 38.59 (0.3) | 37.60 (0.6) | 38.28 | 38.28 (0.2) | 38.59 (0.3) | |||||||
| Composition | He | He | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 96.2678215 (0.1) | 95.59052085 (0.3) | 96.268 (0.1) | 95.591 | |||||||||||||
| Proper motion (declination) | [mas/yr] | -329.8168014 (0.09) | -329.6024269 (0.2) | -329.817 (0.09) | -329.602 | |||||||||||||
| Variability | ||||||||||||||||||
| Magnetic | ||||||||||||||||||
| Bd | [MG] | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||
| Binarity | ||||||||||||||||||
| B magnitude | 19.38 | |||||||||||||||||
| V magnitude | ||||||||||||||||||
| R magnitude | 17.40 | |||||||||||||||||
| I magnitude | ||||||||||||||||||
| J magnitude | 16.70 (0.02) | |||||||||||||||||
| H magnitude | ||||||||||||||||||
| K magnitude | ||||||||||||||||||
| u magnitude | 18.95 (0.02) | 18.95 (0.02) | 18.95 (0.02) | 18.94 | 18.95 (0.02) | 18.95 (0.02) | 18.95 (0.03) | |||||||||||
| g magnitude | 18.87 (0.008) | 18.87 (0.008) | 18.86 | 18.87 (0.008) | 18.87 (0.008) | 18.88 (0.01) | ||||||||||||
| r magnitude | 17.79 (0.006) | 17.79 (0.006) | 17.79 | 17.79 (0.006) | 17.79 (0.006) | 17.79 (0.01) | ||||||||||||
| i magnitude | 17.25 (0.006) | 17.25 (0.006) | 17.25 | 17.25 (0.006) | 17.25 (0.006) | 17.25 (0.01) | ||||||||||||
| z magnitude | 17.29 (0.01) | 17.29 (0.01) | 17.29 | 17.29 (0.01) | 17.29 (0.01) | 17.30 (0.02) | ||||||||||||
| G magnitude | 17.78 (0.02) | 17.81 | 17.81 | 17.78 | 17.78 (0.004) | 17.81 | ||||||||||||
| BP magnitude | 18.46 (0.02) | 18.42 | 18.42 | |||||||||||||||
| RP magnitude | 16.99 (0.009) | 16.98 | 16.98 | |||||||||||||||
| Pan g magnitude | 18.90 (0.01) | 18.90 (0.007) | 18.90 (0.01) | |||||||||||||||
| Pan r magnitude | 17.75 (0.004) | 17.75 (0.004) | 17.75 (0.004) | |||||||||||||||
| Pan i magnitude | 17.26 (0.007) | 17.26 (0.009) | 17.26 (0.009) | |||||||||||||||
| Pan z magnitude | 17.30 (0.007) | 17.30 (0.007) | 17.30 (0.007) | |||||||||||||||
| Pan y magnitude | 17.36 (0.002) | 17.36 (0.003) | 17.36 (0.003) | |||||||||||||||
| 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.