USNO-B1.0 0986-00267826

All names: USNO-B1.0 0986-00267826, SDSS J155024.22+083835.0, GALEX J155024.1+083836, J1550+0838, LSPM J1550+0838, Gaia DR2 4455205894384768256, Gaia EDR3 4455205894384768256, SDSS J155024.21+083835.1, WDJ155024.25+083834.92, Gaia DR3 4455205894384768256, SDSS J155024.22+083835.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 50 24.09 (0.2) 15 50 24.22 15 50 24.10 (0.2) 15 50 24.09 15 50 24.25 (0.2) 15 50 24.10 15 50 24.22
Declination 08 38 35.62 (0.1) 08 38 35.09 08 38 35.60 (0.2) 08 38 35.62 08 38 34.93 (0.1) 08 38 35.60 08 38 35.11
Spectral type DA DA DA DA DA DA DA DA
Effective temperature [K] 6414.0 (48) 6455.0 (48) 6416.0 (48) 6362.0 6548.0 (146) 6440.0 (67)
log(g) [cgs] 8.30 (0.02) 8.33 (0.02) 8.32 (0.02) 8.30 8.33 (0.04) 8.11 (0.2)
Mass [M☉] 0.782 (0.02) 0.804 (0.02) 0.794 (0.02) 0.782 0.801 (0.04) 0.654 (0.1)
log(Luminosity) [L☉]
Cooling age [Gyr] 3.9800 3.7250
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 12.31 (0.2) 12.47 (0.2) 12.47 (0.2) 12.31 12.31 (0.2) 12.47 (0.2)
Distance [pc] 81.26 (1) 80.19 (2) 80.22 (2) 81.26 81.26 (1) 80.22 (2)
Composition H H H
Proper motion (right ascension) [mas/yr] -150.4215809 (0.2) -150.4996434 (0.5) -150.422 (0.2) -150.4996434
Proper motion (declination) [mas/yr] 43.1239703 (0.2) 43.39046169 (0.4) 43.124 (0.2) 43.39046169
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.30
V magnitude
R magnitude 18.80
I magnitude
J magnitude 17.93 (0.04)
H magnitude 17.74 (0.1)
K magnitude 17.80 (0.1)
u magnitude 19.74 (0.03) 19.72 (0.03) 19.74 (0.03) 19.74 (0.03) 19.74 (0.04)
g magnitude 19.05 (0.01) 19.05 (0.01) 19.03 (0.009) 19.06 (0.02)
r magnitude 18.72 (0.009) 18.72 (0.009) 18.73 (0.009) 18.71 (0.02)
i magnitude 18.68 (0.01) 18.68 (0.01) 18.65 (0.01) 18.68 (0.01)
z magnitude 18.66 (0.03) 18.66 (0.03) 18.60 (0.03) 18.66 (0.03)
G magnitude 18.74 (0.03) 18.76 18.74 18.74 (0.003) 18.76
BP magnitude 18.96 (0.03) 18.99 18.99
RP magnitude 18.31 (0.02) 18.36 18.36
Pan g magnitude 19.02 (0.01) 19.02 (0.01)
Pan r magnitude 18.75 (0.006) 18.75 (0.007)
Pan i magnitude 18.65 (0.006) 18.65 (0.005)
Pan z magnitude 18.67 (0.01) 18.67 (0.02)
Pan y magnitude 18.72 (0.01) 18.72 (0.01)
E(B-V) 0.006

* 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.