All names: Gaia DR3 1578256136019422080, SDSS J123832.53+584022.0, SDSS J123832.52+584022.1, WDJ123832.55+584022.11, J1238+5840, SDSS J123832.52+584022.0, SDSS J123832.53+584022.3, Gaia EDR3 1578256136019422080, Gaia DR2 1578256136019422080
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Vincent et al. 2023 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 12 38 32.37 (0.2) | 12 38 32.38 | 12 38 32.37 | 12 38 32.55 (0.2) | 12 38 32.38 | ||||||||
Declination | 58 40 21.76 (0.2) | 58 40 21.77 | 58 40 21.76 | 58 40 22.11 (0.2) | 58 40 21.77 | ||||||||
Spectral type | DC | DC | DC: | DC | DC | ||||||||
Effective temperature | [K] | 5978.0 (67) | 5910.0 (80) | 6441.0 | 6196.0 | 5520.0 (405) | |||||||
log(g) | [cgs] | 8.02 (0.04) | 8.00 (0.04) | 8.27 | 8.14 | 7.97 (0.08) | |||||||
Mass | [M☉] | 0.584 (0.03) | 0.571 (0.03) | 0.76 | 0.663 | 0.553 (0.07) | |||||||
log(Luminosity) | [L☉] | ||||||||||||
Cooling age | [Gyr] | 2.7600 | 3.3790 | 3.1390 | |||||||||
log(H/He) | -3.0 | -3.0 | |||||||||||
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] | 10.13 (0.2) | 10.08 (0.3) | 10.08 (0.3) | 10.13 | 10.13 (0.2) | 10.08 (0.3) | ||||||
Distance | [pc] | 98.71 (2) | 99.21 (3) | 99.21 (3) | 98.71 | 98.71 (2) | 99.21 (3) | ||||||
Composition | He | ||||||||||||
Proper motion (right ascension) | [mas/yr] | -87.35514723 (0.3) | -86.83036678 (0.5) | -87.355 (0.3) | -86.83036678 | ||||||||
Proper motion (declination) | [mas/yr] | -22.15840796 (0.2) | -22.23508835 (0.4) | -22.158 (0.2) | -22.23508835 | ||||||||
Variability | |||||||||||||
Magnetic | |||||||||||||
Bd | [MG] | ||||||||||||
Infrared excess (disk) | |||||||||||||
Binarity | |||||||||||||
B magnitude | |||||||||||||
V magnitude | |||||||||||||
R magnitude | |||||||||||||
I magnitude | |||||||||||||
J magnitude | 18.53 (0.1) | ||||||||||||
H magnitude | |||||||||||||
K magnitude | |||||||||||||
u magnitude | 20.09 (0.05) | 20.07 (0.04) | 20.03 (0.04) | ||||||||||
g magnitude | 19.40 (0.02) | 19.40 (0.01) | |||||||||||
r magnitude | 19.14 (0.02) | 19.13 (0.01) | |||||||||||
i magnitude | 19.01 (0.02) | 19.08 (0.02) | |||||||||||
z magnitude | 19.04 (0.04) | 19.02 (0.05) | |||||||||||
G magnitude | 19.15 (0.03) | 19.17 | 19.15 | 19.15 (0.004) | 19.17 | ||||||||
BP magnitude | 19.37 (0.03) | 19.39 | 19.39 | ||||||||||
RP magnitude | 18.69 (0.04) | 18.67 | 18.67 | ||||||||||
Pan g magnitude | 19.37 (0.01) | 19.37 (0.01) | |||||||||||
Pan r magnitude | 19.11 (0.008) | 19.11 (0.009) | |||||||||||
Pan i magnitude | 19.04 (0.007) | 19.04 (0.006) | |||||||||||
Pan z magnitude | 19.05 (0.02) | 19.05 (0.02) | |||||||||||
Pan y magnitude | 19.09 (0.02) | 19.09 (0.02) | |||||||||||
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.