SDSS J152228.38+354908.7

All names: Gaia DR3 1387110648031412352, Gaia EDR3 1387110648031412352, GALEX J152228.4+354908, SDSS J152228.41+354908.4, USNO-A2.0 1200-07531937, Gaia DR2 1387110648031412352, USNO-B1.0 1258-00229105, SDSS J152228.38+354908.7, SDSS J152228.41+354908.44

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 15 22 28.43 (0.2) 15 22 28.39 15 22 28.43 (0.2) 15 22 28.43 15 22 28.37 (0.2)
Declination 35 49 08.32 (0.2) 35 49 08.77 35 49 08.34 (0.3) 35 49 08.32 35 49 08.97 (0.2)
Spectral type DBA: DBA: DB DBA DB
Effective temperature [K] 12417.0 12213.0 10878.0 11909.0 (149) 11870.0 (144) 10948.0 (593)
log(g) [cgs] 8.24 8.08 7.91 8.00 (0) 8.00 (0) 7.92 (0.1)
Mass [M] 0.734 0.632 0.529 0.535 (0.09)
log(Luminosity) [L]
Cooling age [Gyr] 0.4400
log(H/He) -6.272 <-5.51
log(C/He)
log(Ca/He) <-9.73
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] 3.35 (0.3) 3.30 (0.3) 3.35 3.35 (0.3)
Distance [pc] 298.28 (23) 302.71 (29) 308.00 298.28 298.28 (23)
Composition He
Proper motion (right ascension) [mas/yr] 44.17364379 (0.2) 44.2427929 (0.4) 44.174 (0.2)
Proper motion (declination) [mas/yr] -40.41146316 (0.3) -41.027551 (0.6) -40.411 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.40
V magnitude
R magnitude 19.40
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.28 (0.03) 19.28 (0.03) 19.28 (0.03)
g magnitude 19.23 (0.01) 19.23 (0.01) 19.23 (0.01)
r magnitude 19.42 (0.01) 19.42 (0.01) 19.42 (0.01)
i magnitude 19.62 (0.02) 19.62 (0.02) 19.62 (0.02)
z magnitude 19.90 (0.09) 19.90 (0.09) 19.90 (0.09)
G magnitude 19.31 (0.03) 19.36 19.31 19.31 (0.004)
BP magnitude 19.41 (0.03) 19.29
RP magnitude 19.31 (0.04) 19.27
Pan g magnitude 19.28 (0.01)
Pan r magnitude 19.44 (0.02)
Pan i magnitude 19.61 (0.02)
Pan z magnitude 19.77 (0.03)
Pan y magnitude 19.70 (0.06)
E(B-V) 0.024

* 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.