All names: WDJ231856.53+211749.38, Gaia DR3 2837909055400871424, GALEX J231856.5+211749, SDSS J231856.53+211749.9, Gaia EDR3 2837909055400871424, SDSS J231856.54+211749.9, J2318+2117, Gaia DR2 2837909055400871424, WDJ231856.53+211749.39
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 23 18 56.53 (0.1) | 23 18 56.53 | 23 18 56.53 | 23 18 56.53 (0.1) | 23 18 56.53 | ||||||||
Declination | 21 17 50.33 (0.1) | 21 17 50.30 | 21 17 50.33 | 21 17 49.38 (0.1) | 21 17 50.30 | ||||||||
Spectral type | DC | DC | DC | DA | DC | ||||||||
Effective temperature | [K] | 5798.0 (46) | 5908.0 (53) | 5798.0 (46) | 6183.0 | 5939.0 | 6426.0 (129) | ||||||
log(g) | [cgs] | 8.00 (0.02) | 8.08 (0.02) | 8.00 (0.03) | 8.25 | 8.11 | 8.34 (0.04) | ||||||
Mass | [M☉] | 0.574 (0.02) | 0.619 (0.02) | 0.573 (0.02) | 0.745 | 0.642 | 0.805 (0.03) | ||||||
log(Luminosity) | [L☉] | ||||||||||||
Cooling age | [Gyr] | 3.4200 | 3.6710 | 3.5330 | |||||||||
log(H/He) | -3.0 | -3.0 | -3 | ||||||||||
log(C/He) | |||||||||||||
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] | 12.59 (0.2) | 12.59 (0.2) | 12.59 (0.2) | 12.59 | 12.59 (0.2) | 12.59 (0.2) | ||||||
Distance | [pc] | 79.41 (1) | 79.43 (1) | 79.44 (1) | 79.41 | 79.41 (1) | 79.44 (1) | ||||||
Composition | He | ||||||||||||
Proper motion (right ascension) | [mas/yr] | 6.443326117 (0.2) | 6.410149241 (0.4) | 6.443 (0.2) | 6.410149241 | ||||||||
Proper motion (declination) | [mas/yr] | 59.10532278 (0.1) | 58.84310794 (0.3) | 59.105 (0.1) | 58.84310794 | ||||||||
Variability | |||||||||||||
Magnetic | |||||||||||||
Bd | [MG] | ||||||||||||
Infrared excess (disk) | |||||||||||||
Binarity | |||||||||||||
B magnitude | |||||||||||||
V magnitude | |||||||||||||
R magnitude | |||||||||||||
I magnitude | |||||||||||||
J magnitude | 17.96 (0.05) | ||||||||||||
H magnitude | |||||||||||||
K magnitude | |||||||||||||
u magnitude | 19.77 (0.04) | 19.77 (0.04) | 19.77 (0.04) | ||||||||||
g magnitude | 19.10 (0.01) | 19.10 (0.01) | |||||||||||
r magnitude | 18.75 (0.01) | 18.75 (0.01) | |||||||||||
i magnitude | 18.64 (0.01) | 18.64 (0.01) | |||||||||||
z magnitude | 18.63 (0.04) | 18.63 (0.04) | |||||||||||
G magnitude | 18.75 (0.02) | 18.78 | 18.75 | 18.75 (0.003) | 18.78 | ||||||||
BP magnitude | 19.02 (0.02) | 19.01 | 19.01 | ||||||||||
RP magnitude | 18.35 (0.02) | 18.32 | 18.32 | ||||||||||
Pan g magnitude | 19.05 (0.007) | 19.05 (0.009) | |||||||||||
Pan r magnitude | 18.74 (0.008) | 18.74 (0.007) | |||||||||||
Pan i magnitude | 18.67 (0.003) | 18.67 (0.003) | |||||||||||
Pan z magnitude | 18.66 (0.008) | 18.66 (0.008) | |||||||||||
Pan y magnitude | 18.64 (0.02) | 18.64 (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.