All names: Gaia EDR3 1733833492297878656, SDSS J210908.85+062840.3, LSPM J2109+0628, Gaia DR2 1733833492297878656, SDSS J210908.85+062840.40, J2109+0628, WDJ210908.74+062839.86, GALEX J210908.8+062841, Gaia DR3 1733833492297878656, SDSS J210908.85+062840.4, USNO-B1.0 0964-00564122
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 09 08.95 (0.2) | 21 09 08.85 | 21 09 08.94 (0.3) | 21 09 08.95 | 21 09 08.74 (0.2) | 21 09 08.94 | ||||||||
| Declination | 06 28 41.03 (0.2) | 06 28 40.40 | 06 28 40.99 (0.3) | 06 28 41.03 | 06 28 39.86 (0.2) | 06 28 40.99 | ||||||||
| Spectral type | DA | DA | DA | DA | DA | |||||||||
| Effective temperature | [K] | 6884.0 (49) | 6769.0 | 6526.0 | 6688.0 (55) | 7014.0 (139) | ||||||||
| log(g) | [cgs] | 8.48 (0.03) | 8.45 | 8.35 | 8.05 (0.1) | 8.49 (0.04) | ||||||||
| Mass | [M☉] | 0.903 (0.03) | 0.883 | 0.8 | 0.62 (0.06) | 0.906 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 4.1800 | 3.9040 | 3.8100 | ||||||||||
| 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] | 11.75 (0.2) | 11.98 (0.3) | 11.98 (0.4) | 11.75 | 11.75 (0.2) | 11.98 (0.4) | |||||||
| Distance | [pc] | 85.11 (2) | 83.47 (2) | 83.48 (2) | 85.11 | 85.11 (2) | 83.48 (2) | |||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 187.6405744 (0.2) | 188.321078 (0.5) | 187.641 (0.2) | 188.321078 | |||||||||
| Proper motion (declination) | [mas/yr] | 72.8226013 (0.2) | 73.01176899 (0.5) | 72.823 (0.2) | 73.01176899 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 19.00 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 19.10 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 18.19 (0.07) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.61 (0.03) | 19.61 (0.03) | 19.56 (0.03) | 19.61 (0.03) | 19.61 (0.03) | |||||||||
| g magnitude | 19.09 (0.01) | 19.09 (0.01) | 19.09 (0.01) | 19.09 (0.01) | ||||||||||
| r magnitude | 18.89 (0.01) | 18.87 (0.01) | 18.89 (0.01) | 18.89 (0.01) | ||||||||||
| i magnitude | 18.80 (0.01) | 18.78 (0.01) | 18.80 (0.01) | 18.80 (0.01) | ||||||||||
| z magnitude | 18.84 (0.04) | 18.81 (0.04) | 18.84 (0.04) | 18.84 (0.04) | ||||||||||
| G magnitude | 18.84 (0.03) | 18.86 | 18.84 | 18.84 (0.003) | 18.86 | |||||||||
| BP magnitude | 19.03 (0.03) | 19.02 | 19.02 | |||||||||||
| RP magnitude | 18.48 (0.02) | 18.50 | 18.50 | |||||||||||
| Pan g magnitude | 19.05 (0.007) | 19.05 (0.006) | ||||||||||||
| Pan r magnitude | 18.85 (0.006) | 18.85 (0.006) | ||||||||||||
| Pan i magnitude | 18.82 (0.005) | 18.82 (0.006) | ||||||||||||
| Pan z magnitude | 18.86 (0.009) | 18.86 (0.009) | ||||||||||||
| Pan y magnitude | 18.83 (0.03) | 18.83 (0.03) | ||||||||||||
| 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.