SDSS J103033.20+385447.5

All names: SDSS J103033.21+385447.5, LAMOST J103033.20+385447.5, SDSS J103033.20+385447.59, Gaia EDR3 756045051619999488, SDSS J103033.20+385447.6, Gaia DR2 756045051619999488, Gaia DR3 756045051619999488, SDSS J103033.20+385447.5

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 Simbad Vincent et al. 2023
Right ascension 10 30 33.20 (0.2) 10 30 33.21 10 30 33.20 (0.3) 10 30 33.22 (0.2)
Declination 38 54 47.65 (0.2) 38 54 47.53 38 54 47.65 (0.4) 38 54 47.51 (0.2)
Spectral type DB DB DB DB
Effective temperature [K] 20387.0 21194.0 18071.0 20323.0 (287) 20913.0 (1000)
log(g) [cgs] 8.33 7.67 7.52 8.15 (0.05) 8.12 (0.04)
Mass [M] 0.8 0.438 0.37 0.669 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0559
log(H/He) -4.81 <-4.05
log(C/He)
log(Ca/He) <-4.52
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] 2.33 (0.2) 1.72 (0.4) 2.33 (0.2)
Distance [pc] 429.24 (43) 582.23 (143) 409.00 429.24 (43)
Composition He
Proper motion (right ascension) [mas/yr] -12.48645981 (0.3) -13.43582382 (0.6) -12.486 (0.3)
Proper motion (declination) [mas/yr] 9.229809153 (0.2) 9.671054474 (0.8) 9.23 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.67 (0.02) 18.67 (0.02) 18.67 (0.02)
g magnitude 18.81 (0.008) 18.81 (0.01) 18.81 (0.008)
r magnitude 19.14 (0.01) 19.14 (0.01) 19.14 (0.01)
i magnitude 19.40 (0.02) 19.40 (0.02) 19.40 (0.02)
z magnitude 19.75 (0.06) 19.75 (0.06) 19.75 (0.06)
G magnitude 18.98 (0.02) 19.02 18.98 (0.003)
BP magnitude 18.93 (0.02) 18.83
RP magnitude 19.17 (0.04) 19.10
Pan g magnitude 18.85 (0.01)
Pan r magnitude 19.15 (0.008)
Pan i magnitude 19.46 (0.007)
Pan z magnitude 19.69 (0.01)
Pan y magnitude 19.84 (0.07)
E(B-V) 0.018

* 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.