All names: 2MASS J21382728+1856419, SDSS J213827.29+185641.9, USNO-B1.0 1089-00574705, Gaia EDR3 1786327544661904384, 21384+1856, Gaia DR3 1786327544661904384, Gaia DR2 1786327544661904384, PM J21384+1856, LSPM J2138+1856, TIC 379844060
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Limoges et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|
| Right ascension | 21 38 27.29 (0.07) | 21 38 27.29 (0.09) | 21 38 27.29 (0.07) | ||||
| Declination | 18 56 41.75 (0.07) | 18 56 41.75 (0.1) | 18 56 41.98 (0.07) | ||||
| Spectral type | DA | DA | |||||
| Effective temperature | [K] | 12600.0 (258) | |||||
| log(g) | [cgs] | 7.74 (0.08) | |||||
| Mass | [M☉] | 0.47 (0.04) | |||||
| log(Luminosity) | [L☉] | -2.27 | |||||
| Cooling age | [Gyr] | ||||||
| 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] | 0.47 (0.09) | 0.42 (0.1) | 0.47 (0.09) | |||
| Distance | [pc] | 2109.51 (384) | 2402.11 (631) | 153.20 (3) | 2109.70 (384) | ||
| Composition | H | ||||||
| Proper motion (right ascension) | [mas/yr] | -4.202734605 (0.08) | -4.058 (0.2) | -4.203 (0.08) | |||
| Proper motion (declination) | [mas/yr] | -14.89488276 (0.08) | -14.78 (0.2) | -14.895 (0.08) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | 17.50 | ||||||
| V magnitude | |||||||
| R magnitude | 16.70 | ||||||
| I magnitude | |||||||
| J magnitude | 15.96 | 15.96 (0.09) | |||||
| H magnitude | 15.38 | 15.38 (0.1) | |||||
| K magnitude | 15.45 | 15.45 (0.2) | |||||
| u magnitude | 17.55 | 19.30 (0.02) | |||||
| g magnitude | 17.16 | 17.82 (0.006) | |||||
| r magnitude | 17.32 | 17.18 (0.006) | |||||
| i magnitude | 17.54 | 16.92 (0.006) | |||||
| z magnitude | 17.76 | 16.76 (0.01) | |||||
| G magnitude | 17.22 (0.01) | 17.24 | 17.22 (0.003) | ||||
| BP magnitude | 17.66 (0.01) | 17.68 | |||||
| RP magnitude | 16.59 (0.01) | 16.59 | |||||
| Pan g magnitude | 17.18 (0.004) | ||||||
| Pan r magnitude | 17.36 (0.003) | ||||||
| Pan i magnitude | 17.58 (0.003) | ||||||
| Pan z magnitude | 17.78 (0.004) | ||||||
| Pan y magnitude | 17.93 (0.02) | ||||||
| E(B-V) | 0.061 | ||||||
* 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.