All names: SDSS J123800.09+194631.4, J1238+1946, GALEX J123800.0+194631, Gaia DR3 3948319763985443200, Gaia EDR3 3948319763985443200, [BGK2006] J123800.10+194631.4, SDSS J123800.10+194631.4, Gaia DR2 3948319763985443200, EQ J1238+1946
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Gianninas et al. 2014 | Simbad |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 38 00.08 (0.08) | 12 38 00.10 | 12 38 00.08 (0.1) | 12 38 00.11 (0.08) | ||||
| Declination | 19 46 31.09 (0.06) | 19 46 31.42 | 19 46 31.11 (0.07) | 19 46 31.63 (0.06) | ||||
| Spectral type | DA | B | ||||||
| Effective temperature | [K] | 14950.0 (240) | ||||||
| log(g) | [cgs] | 4.89 (0.05) | ||||||
| Mass | [M☉] | 0.21 | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | 0.1040 (0.03) | ||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | -6.02 | |||||||
| log(C/H) | ||||||||
| log(N/H) | ||||||||
| log(O/H) | ||||||||
| log(Na/H) | ||||||||
| log(Mg/H) | -6.12 | |||||||
| 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] | 0.45 (0.1) | 0.77 (0.1) | 0.45 (0.1) | ||||
| Distance | [pc] | 2210.58 (482) | 1306.63 (224) | 3529.00 (319) | 2210.43 (482) | |||
| Composition | H | |||||||
| Proper motion (right ascension) | [mas/yr] | -21.16075551 (0.1) | -21.1893832 (0.2) | -21.161 (0.1) | ||||
| Proper motion (declination) | [mas/yr] | -33.64626031 (0.09) | -33.62178305 (0.1) | -33.646 (0.09) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | WDMS | |||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 17.72 (0.01) | 17.72 (0.01) | ||||||
| g magnitude | 17.29 (0.005) | 17.29 (0.005) | ||||||
| r magnitude | 17.62 (0.007) | 17.62 (0.007) | ||||||
| i magnitude | 17.87 (0.008) | 17.88 (0.008) | ||||||
| z magnitude | 18.09 (0.02) | 18.08 (0.02) | ||||||
| G magnitude | 17.49 (0.009) | 17.51 | 17.49 (0.003) | |||||
| BP magnitude | 17.45 (0.009) | 17.41 | ||||||
| RP magnitude | 17.60 (0.01) | 17.58 | ||||||
| Pan g magnitude | 17.35 (0.006) | |||||||
| Pan r magnitude | 17.64 (0.009) | |||||||
| Pan i magnitude | 17.92 (0.003) | |||||||
| Pan z magnitude | 18.11 (0.006) | |||||||
| Pan y magnitude | 18.18 (0.02) | |||||||
| E(B-V) | 0.023 | |||||||
* 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.