All names: WD 1550+62, GD 352, Gaia DR3 1639910911246160896, Gaia EDR3 1639910911246160896, EGGR 366, 2MASS J15510992+6227199, WDJ155109.86+622720.29, Gaia DR2 1639910911246160896, GALEX J155109.8+622720, SDSS J155109.82+622720.8, SDSS J155109.81+622720.8, TIC 198554945, J1551+6227, WD 1550+626
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Gaia DR2 | Stilism | Wegner and Yackovich 1984 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 51 09.75 (0.05) | 15 51 09.75 (0.06) | 15 51 09.75 | 15 51 09.86 (0.05) | 15 51 09.75 | 15 51 10.18 | ||||||
| Declination | 62 27 21.88 (0.05) | 62 27 21.83 (0.06) | 62 27 21.88 | 62 27 20.29 (0.05) | 62 27 21.83 | 62 27 16.56 | ||||||
| Spectral type | DQ | DQ | DQ | DQ6 | DC6 | |||||||
| Effective temperature | [K] | 7822.0 (45) | 7753.0 (33) | 8000.0 | 7670.0 (48) | |||||||
| log(g) | [cgs] | 7.93 (0.008) | 7.92 (0.007) | 7.89 (0.01) | ||||||||
| Mass | [M☉] | 0.538 (0.007) | 0.528 (0.006) | 0.513 (0.009) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 1.1300 | 0.6000 | |||||||||
| log(H/He) | <-3.3 | |||||||||||
| log(C/He) | -5.8 | -5.7 | -5.0 | |||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(N/He) | <-8 | |||||||||||
| log(O/He) | <-8 | |||||||||||
| 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] | 17.98 (0.05) | 18.04 (0.06) | 18.04 (0.06) | 17.98 | 17.98 (0.05) | 18.04 (0.06) | |||||
| Distance | [pc] | 55.61 (0.1) | 55.43 (0.2) | 55.43 (0.2) | 55.61 | 55.61 (0.1) | 55.43 (0.2) | |||||
| Composition | He | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -49.76449243 (0.05) | -49.84055544 (0.1) | -49.764 (0.05) | -49.84055544 | |||||||
| Proper motion (declination) | [mas/yr] | 98.9850333 (0.06) | 99.02478026 (0.1) | 98.985 (0.06) | 99.02478026 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 16.50 | |||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 16.42 (0.1) | 16.42 (0.1) | ||||||||||
| H magnitude | ||||||||||||
| K magnitude | 15.43 (0.2) | 15.43 (0.2) | ||||||||||
| u magnitude | 17.14 (0.009) | 17.15 (0.009) | 17.15 (0.009) | |||||||||
| g magnitude | 16.83 (0.004) | 16.83 (0.004) | ||||||||||
| r magnitude | 16.81 (0.004) | 16.81 (0.004) | ||||||||||
| i magnitude | 16.89 (0.005) | 16.89 (0.005) | ||||||||||
| z magnitude | 17.03 (0.01) | 17.03 (0.01) | ||||||||||
| G magnitude | 16.76 (0.005) | 16.78 | 16.76 | 16.76 (0.003) | 16.78 | |||||||
| BP magnitude | 16.86 (0.005) | 16.85 | 16.85 | |||||||||
| RP magnitude | 16.58 (0.005) | 16.58 | 16.58 | |||||||||
| Pan g magnitude | 16.84 (0.005) | 16.84 (0.005) | ||||||||||
| Pan r magnitude | 16.82 (0.004) | 16.82 (0.004) | ||||||||||
| Pan i magnitude | 16.90 (0.002) | 16.90 (0.002) | ||||||||||
| Pan z magnitude | 17.02 (0.004) | 17.02 (0.004) | ||||||||||
| Pan y magnitude | 17.10 (0.007) | 17.10 (0.007) | ||||||||||
| E(B-V) | 0.008 | |||||||||||
* 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.