WD 0855+172

All names: SDSS J085838.73+170147.9, WD 0855+172, Gaia DR2 611566852908865280, SDSS J085838.73+170147.93, LB 8999, Gaia EDR3 611566852908865280, LAMOST J085838.73+170148.3, Gaia DR3 611566852908865280, SDSS J085838.71+170148.2, SDSS J085838.71+170148.1, GALEX J085838.7+170148

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 SDSS DR12 MWDD H Gaia DR2 Stilism Guo et al. 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Vincent et al. 2023
Right ascension 08 58 38.74 (0.1) 08 58 38.72 08 58 38.72 08 58 38.74 (0.2) 08 58 38.74 08 58 38.71 (0.1) 08 58 38.47
Declination 17 01 47.84 (0.09) 17 01 48.19 17 01 48.19 17 01 47.86 (0.1) 17 01 47.84 17 01 48.44 (0.09) 17 01 49.80
Spectral type DA DA DA DA DA ? DA
Effective temperature [K] 17500.0 19373.0 (128) 18437.0 (1190)
log(g) [cgs] 7.84 7.95 (0.02) 7.90 (0.08)
Mass [M] 0.53 0.596 (0.01) 0.564 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.0854
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] 3.35 (0.2) 3.32 (0.2) 3.35 3.35 (0.2)
Distance [pc] 298.14 (14) 300.86 (19) 298.14 298.14 (14)
Composition H
Proper motion (right ascension) [mas/yr] 29.64735331 (0.2) 29.59838301 (0.3) 29.647 (0.2)
Proper motion (declination) [mas/yr] -37.43301617 (0.1) -37.3270382 (0.2) -37.433 (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 18.12 (0.01) 18.12 (0.01) 18.12 (0.02) 18.12 (0.01)
g magnitude 18.01 (0.006) 18.01 (0.006) 18.00 (0.01) 18.01 (0.006)
r magnitude 18.35 (0.008) 18.34 (0.008) 18.35 (0.02) 18.35 (0.008)
i magnitude 18.66 (0.01) 18.66 (0.01) 18.67 (0.02) 18.66 (0.01)
z magnitude 18.94 (0.04) 18.93 (0.04) 18.96 (0.04) 18.94 (0.04)
G magnitude 18.19 (0.01) 18.22 18.19 18.19 (0.003)
BP magnitude 18.14 (0.01) 18.09
RP magnitude 18.40 (0.02) 18.34
Pan g magnitude 18.04 (0.005)
Pan r magnitude 18.33 (0.009)
Pan i magnitude 18.67 (0.009)
Pan z magnitude 18.91 (0.01)
Pan y magnitude 19.08 (0.1)
E(B-V) 0.020

* 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.