LB 10227

All names: US 2520, SDSS J113028.62+301120.6, SDSS J113028.62+301120.7, Gaia DR2 4022627061893278720, SDSS J113028.62+301120.70, Gaia EDR3 4022627061893278720, PB 2819, Gaia DR3 4022627061893278720, LB 10227

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 11 30 28.61 (0.3) 11 30 28.62 11 30 28.61 (0.4) 11 30 28.63 (0.3) 11 30 28.62
Declination 30 11 20.76 (0.3) 30 11 20.75 30 11 20.76 (0.3) 30 11 20.78 (0.3) 30 11 20.72
Spectral type DBAH: DBAH DBAH: DB
Effective temperature [K] 14404.0 14678.0 13084.0 13894.0 (92) 14929.0 (287)
log(g) [cgs] 8.27 8.32 8.15 8.00 (0) 8.66 (0.2)
Mass [M] 0.757 0.791 0.679
log(Luminosity) [L]
Cooling age [Gyr] 0.3840
log(H/He) -5.029 -4.97 (0.3)
log(C/He)
log(Ca/He) <-8.27
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] 2.90 (0.3) 3.41 (0.6) 2.90 (0.3)
Distance [pc] 344.41 (37) 293.12 (48) 337.00 344.41 (37)
Composition He
Proper motion (right ascension) [mas/yr] -10.12189815 (0.3) -10.66110274 (1) -10.122 (0.3)
Proper motion (declination) [mas/yr] -1.380340949 (0.3) -2.025771938 (0.6) -1.38 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.98 (0.02) 18.98 (0.02) 19.02 (0.03)
g magnitude 19.06 (0.01) 19.06 (0.01) 19.06 (0.05)
r magnitude 19.33 (0.01) 19.33 (0.01) 19.38 (0.03)
i magnitude 19.55 (0.02) 19.55 (0.02) 19.61 (0.05)
z magnitude 19.64 (0.08) 19.64 (0.07) 19.69 (0.07)
G magnitude 19.14 (0.02) 19.17 19.14 (0.004)
BP magnitude 19.17 (0.02) 19.20
RP magnitude 19.20 (0.04) 19.29
Pan g magnitude 19.07 (0.007)
Pan r magnitude 19.27 (0.01)
Pan i magnitude 19.51 (0.01)
Pan z magnitude 19.73 (0.02)
Pan y magnitude 19.82 (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.