All names: WDJ090514.75+090427.32, SDSS J090514.79+090426.3, LP 486-48, TIC 323595796, WD 0902+09, SDSS J090514.79+090426.2, J0905+0904, SDSS J090514.78+090426.5, LAMOST J090514.78+090426.5, EGGR 532, Gaia DR2 591207406550605312, SDSS J090514.89+090424.2, WD 0902+093, GALEX J090514.7+090426, USNO-B1.0 0990-00179749, 2MASS J09051475+0904272, LSPM J0905+0904, Gaia DR3 591207406550605312, NLTT 20931, Gaia EDR3 591207406550605312, WD 0902+092
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Guo et al. 2015 | Koester et al. 2006 | 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 05 14.94 (0.05) | 09 05 14.79 | 09 05 14.79 | 09 05 14.93 (0.07) | 09 05 14.94 | 09 05 14.75 (0.05) | 09 05 14.93 | 09 05 14.26 | 09 05 14.78 | ||||||||
| Declination | 09 04 23.21 (0.03) | 09 04 26.27 | 09 04 26.27 | 09 04 23.33 (0.05) | 09 04 23.21 | 09 04 27.32 (0.03) | 09 04 23.33 | 09 04 41.52 | 09 04 26.54 | ||||||||
| Spectral type | DQ | DQ | DQ | DQ? | DQA | DQ | DQ | DC | DC6 | DQ | DQ | ||||||
| Effective temperature | [K] | 8440.0 (42) | 8539.0 (36) | 8216.0 (192) | 8861.0 | 8317.0 (49) | 10204.0 (116) | ||||||||||
| log(g) | [cgs] | 7.92 (0.008) | 7.97 (0.009) | 7.88 | 8.00 (0) | 7.90 (0.01) | 9.63 (0.3) | ||||||||||
| Mass | [M☉] | 0.533 (0.007) | 0.562 (0.007) | 0.5072 | 0.52 (0.009) | ||||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||
| Cooling age | [Gyr] | 0.9500 | 0.8880 | ||||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | -5.15 | -5.19 | -5.4114 (0.04) | -4.89 (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] | 16.78 (0.06) | 16.79 (0.08) | 16.79 | 16.79 (0.08) | 16.78 | 16.78 (0.06) | 16.79 (0.08) | |||||||||
| Distance | [pc] | 59.59 (0.2) | 59.56 (0.3) | 59.56 (0.3) | 59.56 (0.3) | 59.59 | 59.59 (0.2) | 59.56 (0.3) | |||||||||
| Composition | He | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 178.8144816 (0.07) | 178.5978964 (0.1) | 178.814 (0.07) | 178.598 | ||||||||||||
| Proper motion (declination) | [mas/yr] | -256.9330206 (0.05) | -256.8958135 (0.08) | -256.933 (0.05) | -256.896 | ||||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 16.80 | ||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | 16.60 | ||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 16.58 (0.008) | 16.21 (0.1) | |||||||||||||||
| H magnitude | 16.54 (0.02) | ||||||||||||||||
| K magnitude | 16.55 (0.03) | ||||||||||||||||
| u magnitude | 16.95 (0.007) | 16.94 (0.007) | 16.95 (0.007) | 16.94 (0.007) | 16.95 (0.02) | ||||||||||||
| g magnitude | 16.70 (0.004) | 16.70 (0.004) | 16.70 (0.004) | 16.76 (0.02) | |||||||||||||
| r magnitude | 16.74 (0.005) | 16.74 (0.005) | 16.73 (0.004) | 16.73 (0.02) | |||||||||||||
| i magnitude | 16.84 (0.006) | 16.84 (0.006) | 16.83 (0.005) | 16.83 (0.03) | |||||||||||||
| z magnitude | 16.99 (0.01) | 16.99 (0.01) | 16.99 (0.01) | 16.99 (0.02) | |||||||||||||
| G magnitude | 16.67 (0.003) | 16.69 | 16.67 | 16.67 (0.003) | 16.69 | ||||||||||||
| BP magnitude | 16.74 (0.003) | 16.72 | 16.72 | ||||||||||||||
| RP magnitude | 16.53 (0.004) | 16.54 | 16.54 | ||||||||||||||
| Pan g magnitude | 16.71 (0.005) | 16.72 (0.006) | |||||||||||||||
| Pan r magnitude | 16.75 (0.002) | 16.76 (0.006) | |||||||||||||||
| Pan i magnitude | 16.86 (0.004) | 16.87 (0.003) | |||||||||||||||
| Pan z magnitude | 17.01 (0.004) | 16.99 (0.006) | |||||||||||||||
| Pan y magnitude | 17.09 (0.008) | 17.11 (0.01) | |||||||||||||||
| 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.