All names: 2MASS J02421386+1655281, PSO J040.5579+16.9221, Gaia EDR3 81957772828837888, LP 410-80, WDJ024213.85+165527.74, GALEX J024213.9+165527, USNO-B1.0 1069-00027112, NLTT 8733, Gaia DR3 81957772828837888, LSPM J0242+1655, TIC 52123254, J0242+1655, 0239+167, LHS 1433, Gaia DR2 81957772828837888
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Caron et al. 2023 | Blouin & Dufour 2019 | Blouin et al. 2019 | Leggett et al. 2018 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 42 13.94 (0.07) | 02 42 13.94 (0.08) | 02 42 13.94 | 02 42 13.85 (0.07) | 02 42 13.94 | |||||||
| Declination | 16 55 16.43 (0.06) | 16 55 16.78 (0.07) | 16 55 16.43 | 16 55 27.74 (0.06) | 16 55 16.78 | |||||||
| Spectral type | DQ | DQpec | DQ | a DQ7.7 | DC | DQ | ||||||
| Effective temperature | [K] | 6343.0 (17) | 6360.0 (60) | 6360.0 (60) | 5981.0 (81) | |||||||
| log(g) | [cgs] | 7.96 (0.007) | 7.99 (0.02) | 7.99 (0.02) | 7.87 (0.02) | |||||||
| Mass | [M☉] | 0.552 (0.006) | 0.569 (0.01) | 0.569 (0.01) | 0.498 (0.02) | |||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 2.0000 | 1.9720 (0.09) | |||||||||
| log(H/He) | ||||||||||||
| log(C/He) | -6.45 | -6.5 (0.05) | -6.47 | |||||||||
| 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] | 23.70 (0.07) | 23.71 (0.09) | 23.71 (0.09) | 23.71 (0.09) | 25.21 (0.5) | 23.71 (0.09) | 23.70 | 23.70 (0.07) | 23.71 (0.09) | ||
| Distance | [pc] | 42.20 (0.1) | 42.18 (0.2) | 42.18 (0.2) | 42.18 (0.2) | 39.67 (0.7) | 42.18 (0.2) | 42.20 | 42.20 (0.1) | 42.18 (0.2) | ||
| Composition | He | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 85.00281623 (0.08) | 85.002 (0.2) | 85.003 (0.08) | 85.00233263 | |||||||
| Proper motion (declination) | [mas/yr] | -706.9354878 (0.07) | -706.936 (0.1) | -706.935 (0.07) | -706.9362035 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 16.50 | |||||||||||
| V magnitude | ||||||||||||
| R magnitude | 16.80 | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 16.34 (0.01) | 16.29 (0.08) | 16.29 (0.08) | |||||||||
| H magnitude | 16.41 (0.2) | 16.46 (0.2) | 16.46 (0.2) | |||||||||
| K magnitude | ||||||||||||
| u magnitude | ||||||||||||
| g magnitude | 17.17 (0.02) | |||||||||||
| r magnitude | 16.92 (0.007) | |||||||||||
| i magnitude | 16.91 (0.004) | |||||||||||
| z magnitude | 16.93 (0.005) | |||||||||||
| G magnitude | 16.93 (0.007) | 16.95 | 16.93 | 16.93 (0.003) | 16.95 | |||||||
| BP magnitude | 17.16 (0.007) | 17.14 | 17.14 | |||||||||
| RP magnitude | 16.55 (0.007) | 16.56 | 16.56 | |||||||||
| Pan g magnitude | 17.20 (0.004) | 17.20 (0.004) | 17.17 | 17.17 (0.02) | ||||||||
| Pan r magnitude | 16.71 (0.04) | 16.71 (0.04) | 16.91 | 16.91 (0.007) | ||||||||
| Pan i magnitude | 16.89 (0.002) | 16.89 (0.002) | 16.91 | 16.91 (0.004) | ||||||||
| Pan z magnitude | 16.90 (0.003) | 16.90 (0.003) | 16.93 | 16.93 (0.005) | ||||||||
| Pan y magnitude | 16.97 (0.01) | 16.97 (0.01) | 16.99 | 16.99 (0.008) | ||||||||
| 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.