All names: SDSS J000122.51+235934.20, USNO-A2.0 1125-00009501, SDSS J000122.51+235934.2, Gaia DR2 2848447668194928000, GALEX 2503018566919396429, Gaia DR3 2848447668194928000, Gaia EDR3 2848447668194928000
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | MWDD HE | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 00 01 22.49 (0.6) | 00 01 22.50 | 00 01 22.49 (1) | 00 01 22.50 (1) | 00 01 22.51 | ||||||
Declination | 23 59 34.00 (0.4) | 23 59 34.19 | 23 59 34.00 (0.6) | 23 59 34.24 (0.6) | 23 59 34.17 | ||||||
Spectral type | DB: | DB | DB: | DB | |||||||
Effective temperature | [K] | 12339.0 | 9319.0 | 12362.0 (418) | |||||||
log(g) | [cgs] | 6.88 | 8.31 | 7.66 (0.4) | |||||||
Mass | [M☉] | 0.194 | 0.775 | ||||||||
log(Luminosity) | [L☉] | ||||||||||
Cooling age | [Gyr] | 1.1620 | |||||||||
log(H/He) | <-5.672 | ||||||||||
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] | 2.11 (0.7) | 3.23 (1) | 3.23 (1) | |||||||
Distance | [pc] | 473.53 (162) | 309.73 (142) | 309.73 (142) | |||||||
Composition | He | ||||||||||
Proper motion (right ascension) | [mas/yr] | -12.65997494 (0.9) | -8.40762013 (3) | -8.408 (3) | |||||||
Proper motion (declination) | [mas/yr] | -14.44842039 (0.4) | -15.62260009 (1) | -15.623 (1) | |||||||
Variability | |||||||||||
Magnetic | |||||||||||
Bd | [MG] | ||||||||||
Infrared excess (disk) | |||||||||||
Binarity | |||||||||||
B magnitude | 19.30 (0.3) | ||||||||||
V magnitude | |||||||||||
R magnitude | 19.30 (0.3) | ||||||||||
I magnitude | |||||||||||
J magnitude | |||||||||||
H magnitude | |||||||||||
K magnitude | |||||||||||
u magnitude | 20.52 (0.05) | 20.60 (0.06) | 20.60 (0.06) | ||||||||
g magnitude | 20.37 (0.02) | 20.43 (0.03) | 20.43 (0.03) | ||||||||
r magnitude | 20.43 (0.03) | 20.53 (0.03) | 20.53 (0.03) | ||||||||
i magnitude | 20.50 (0.04) | 20.58 (0.04) | 20.58 (0.04) | ||||||||
z magnitude | 20.66 (0.2) | 20.70 (0.2) | 20.70 (0.2) | ||||||||
G magnitude | 20.37 (0.1) | 20.45 | 20.45 (0.01) | ||||||||
BP magnitude | 20.51 (0.1) | 20.36 | |||||||||
RP magnitude | 19.96 (0.09) | 20.09 | |||||||||
Pan g magnitude | 20.41 (0.01) | ||||||||||
Pan r magnitude | 20.47 (0.02) | ||||||||||
Pan i magnitude | 20.61 (0.03) | ||||||||||
Pan z magnitude | 20.63 (0.05) | ||||||||||
Pan y magnitude | 20.52 (0.2) | ||||||||||
E(B-V) | 0.055 |
* 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.