SDSS J165522.00+433638.5

All names: SDSS J165522.00+433638.56, SDSS J165522.00+433638.5, Gaia EDR3 1358181839974037760, GALEX J165521.9+433639, SDSS J165522.00+433638.6, Gaia DR2 1358181839974037760, Gaia DR3 1358181839974037760, SDSS J165521.99+433639.4

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 16 55 22.01 (0.1) 16 55 21.99 16 55 22.00 (0.1) 16 55 22.01 16 55 21.99 (0.1)
Declination 43 36 38.17 (0.1) 43 36 39.45 43 36 38.22 (0.1) 43 36 38.17 43 36 39.88 (0.1)
Spectral type DBA DBA DB DBA DB
Effective temperature [K] 14533.0 13922.0 14292.0 14949.0 (54) 15123.0 (83) 14314.0 (650)
log(g) [cgs] 7.71 7.93 7.98 8.00 (0) 7.96 (0.07) 8.00 (0.06)
Mass [M] 0.436 0.547 0.575 0.616 (0.04) 0.589 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.2227
log(H/He) -6.143 <-5.32
log(C/He)
log(Ca/He) <-7.81
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] 4.18 (0.1) 4.07 (0.2) 4.18 4.18 (0.1)
Distance [pc] 239.37 (6) 245.87 (9) 250.00 239.37 239.37 (6)
Composition He
Proper motion (right ascension) [mas/yr] 9.622568906 (0.1) 9.235539887 (0.3) 9.623 (0.1)
Proper motion (declination) [mas/yr] -107.25072 (0.1) -107.9742435 (0.3) -107.251 (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 18.16 (0.01) 18.15 (0.03) 18.16 (0.01)
g magnitude 18.19 (0.007) 18.20 (0.02) 18.19 (0.007)
r magnitude 18.47 (0.008) 18.47 (0.01) 18.48 (0.008)
i magnitude 18.70 (0.01) 18.69 (0.01) 18.70 (0.01)
z magnitude 18.89 (0.04) 18.87 (0.04) 18.89 (0.04)
G magnitude 18.30 (0.01) 18.33 18.30 18.30 (0.003)
BP magnitude 18.26 (0.01) 18.21
RP magnitude 18.39 (0.02) 18.35
Pan g magnitude 18.21 (0.002)
Pan r magnitude 18.44 (0.005)
Pan i magnitude 18.70 (0.004)
Pan z magnitude 18.92 (0.02)
Pan y magnitude 19.08 (0.05)
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.