SDSS J212721.51+053434.5

All names: Gaia DR2 2699327812427459584, GALEX J212721.5+053435, Gaia EDR3 2699327812427459584, SDSS J212721.52+053434.54, SDSS J212721.51+053434.5, Gaia DR3 2699327812427459584, SDSS J212721.52+053434.5

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Bedard et al. 2020 MWDD H Gaia DR2 Stilism Kepler et al. 2015 Simbad
Right ascension 21 27 21.52 (0.1) 21 27 21.52 21 27 21.52 (0.2) 21 27 21.52 (0.1)
Declination 05 34 34.44 (0.1) 05 34 34.58 05 34 34.45 (0.2) 05 34 34.65 (0.1)
Spectral type DOA DO DO DO
Effective temperature [K] 78304.0 (3904) 27313.0 100000.0 (15000)
log(g) [cgs] 8.03 (0.2) 6.19 7.50 (0.5)
Mass [M] 0.71 (0.1) 0.182
log(Luminosity) [L] 0.79 (0.2)
Cooling age [Gyr] 0.0007 (0.0001)
log(H/He)
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] 0.75 (0.2) 0.53 (0.3) 0.75 (0.2)
Distance [pc] 1324.94 (341) 1901.56 (1043) 1325.03 (341)
Composition He
Proper motion (right ascension) [mas/yr] 0.298361206 (0.2) -0.092015674 (0.4) 0.298 (0.2)
Proper motion (declination) [mas/yr] -13.14031356 (0.1) -13.80404267 (0.4) -13.14 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.71 (0.01) 17.73 (0.02) 17.71 (0.01)
g magnitude 18.12 (0.006) 18.14 (0.01) 18.12 (0.006)
r magnitude 18.64 (0.009) 18.65 (0.01) 18.64 (0.009)
i magnitude 18.99 (0.01) 18.98 (0.02) 18.99 (0.01)
z magnitude 19.42 (0.06) 19.43 (0.05) 19.42 (0.06)
G magnitude 18.39 (0.02) 18.41 18.39 (0.003)
BP magnitude 18.25 (0.02) 18.19
RP magnitude 18.71 (0.03) 18.67
Pan g magnitude 18.23 (0.004)
Pan r magnitude 18.66 (0.006)
Pan i magnitude 19.03 (0.004)
Pan z magnitude 19.31 (0.01)
Pan y magnitude 19.47 (0.04)
E(B-V) 0.043

* Constant surface field

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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.