All names: WD 1618+208, Gaia DR3 1202123726533582848, SDSS J162027.70+204453.9, 2MASS J16202772+2044555, Gaia EDR3 1202123726533582848, GALEX J162027.7+204453, SDSS J162027.71+204453.9, WIRED J162027.70+204453.9, Gaia DR2 1202123726533582848, J1620+2044, LSPM J1620+2044, WDJ162027.70+204455.13, TIC 230219901, USNO-B1.0 1107-00254655
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Gaia DR2 | Stilism | Sayres et al. 2012 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 20 27.71 (0.1) | 16 20 27.71 | 16 20 27.71 (0.09) | 16 20 27.73 | 16 20 27.71 | 16 20 27.70 (0.1) | 16 20 27.71 | 16 20 27.71 | |||||
| Declination | 20 44 50.38 (0.1) | 20 44 53.96 | 20 44 50.53 (0.1) | 20 44 55.30 | 20 44 50.38 | 20 44 55.09 (0.1) | 20 44 50.53 | 20 44 53.95 | |||||
| Spectral type | DA | DA5.5 | DA | DA5.5 | DA | DA | |||||||
| Effective temperature | [K] | 8255.0 (34) | 9070.0 (30) | 8316.0 (63) | 8842.0 (23) | ||||||||
| log(g) | [cgs] | 7.78 (0.01) | 8.16 (0.04) | 7.77 (0.02) | 8.05 (0.03) | ||||||||
| Mass | [M☉] | 0.474 (0.01) | 0.467 (0.01) | 0.626 (0.02) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.7900 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| log(C/H) | |||||||||||||
| log(N/H) | |||||||||||||
| log(O/H) | |||||||||||||
| log(Na/H) | |||||||||||||
| log(Mg/H) | |||||||||||||
| log(Al/H) | |||||||||||||
| log(Si/H) | |||||||||||||
| log(P/H) | |||||||||||||
| log(S/H) | |||||||||||||
| log(Sc/H) | |||||||||||||
| log(Ti/H) | |||||||||||||
| log(Cr/H) | |||||||||||||
| log(Mn/H) | |||||||||||||
| log(Fe/H) | |||||||||||||
| log(Ni/H) | |||||||||||||
| Parallax | [mas] | 14.43 (0.2) | 14.68 (0.1) | 14.68 (0.2) | 14.43 | 14.43 (0.2) | 14.68 (0.2) | ||||||
| Distance | [pc] | 69.30 (0.8) | 68.12 (0.7) | 68.11 (0.7) | 61.30 | 69.30 | 69.30 (0.8) | 68.11 (0.7) | |||||
| Composition | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 11.36308911 (0.2) | 10.64005149 (0.2) | 11.363 (0.2) | 10.64005149 | ||||||||
| Proper motion (declination) | [mas/yr] | -294.1994912 (0.2) | -296.8310579 (0.2) | -294.199 (0.2) | -296.8310579 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 16.90 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 16.70 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.30 (0.01) | 16.08 (0.1) | 16.09 (0.1) | ||||||||||
| H magnitude | 15.98 (0.2) | 15.98 (0.2) | 15.98 (0.2) | ||||||||||
| K magnitude | 16.89 (0.03) | 16.89 | |||||||||||
| u magnitude | 17.25 (0.009) | 17.25 (0.01) | 17.23 (0.01) | 17.25 (0.009) | 17.23 (0.009) | 17.25 (0.02) | |||||||
| g magnitude | 16.79 (0.004) | 16.77 (0.004) | 16.79 (0.004) | 16.77 (0.004) | 16.77 (0.03) | ||||||||
| r magnitude | 16.75 (0.004) | (0.004) | 16.75 (0.004) | 16.73 (0.004) | 16.75 (0.01) | ||||||||
| i magnitude | 16.81 (0.005) | 16.77 (0.005) | 16.81 (0.005) | 16.77 (0.005) | 16.77 (0.02) | ||||||||
| z magnitude | 16.89 (0.01) | 16.86 (0.01) | 16.89 (0.01) | 16.86 (0.01) | 16.87 (0.03) | ||||||||
| G magnitude | 16.72 (0.003) | 16.72 | 16.72 | 16.72 (0.003) | 16.72 | ||||||||
| BP magnitude | 16.81 (0.003) | 16.80 | 16.80 | ||||||||||
| RP magnitude | 16.48 (0.004) | 16.49 | 16.49 | ||||||||||
| Pan g magnitude | 16.77 (0.003) | 16.77 (0.003) | |||||||||||
| Pan r magnitude | 16.75 (0.003) | 16.75 (0.003) | |||||||||||
| Pan i magnitude | 16.81 (0.002) | 16.81 (0.002) | |||||||||||
| Pan z magnitude | 16.91 (0.01) | 16.91 (0.01) | |||||||||||
| Pan y magnitude | 16.98 (0.006) | 16.98 (0.006) | |||||||||||
| E(B-V) | 0.007 | ||||||||||||
* 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.