SDSS J165417.27+193857.8

All names: Gaia EDR3 4561402637270247552, SDSS J165417.27+193857.80, Gaia DR2 4561402637270247552, Gaia DR3 4561402637270247552, SDSS J165417.25+193857.7, SDSS J165417.27+193857.8, SDSS J165417.26+193857.7, GALEX J165417.3+193858

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 54 17.25 (0.1) 16 54 17.26 16 54 17.25 (0.2) 16 54 17.25 16 54 17.27 (0.1) 16 54 17.27
Declination 19 38 57.87 (0.1) 19 38 57.76 19 38 57.86 (0.2) 19 38 57.87 19 38 57.77 (0.1) 19 38 57.76
Spectral type DBA: DB DBA DBA: DB
Effective temperature [K] 14174.0 12982.0 11895.0 12510.0 (567) 14789.0 (343)
log(g) [cgs] 8.32 8.03 7.96 7.81 (0.1) 8.75 (0.2)
Mass [M] 0.791 0.604 0.559 0.483 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.3685
log(H/He) -5.139
log(C/He)
log(Ca/He)
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] 3.03 (0.2) 3.34 (0.2) 3.03 3.03 (0.2)
Distance [pc] 330.19 (22) 299.03 (22) 330.19 330.20 (22)
Composition He
Proper motion (right ascension) [mas/yr] -20.15824738 (0.2) -20.25783185 (0.4) -20.158 (0.2)
Proper motion (declination) [mas/yr] 6.165736866 (0.2) 6.059616618 (0.4) 6.166 (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 19.07 (0.02) 19.07 (0.02) 19.07 (0.02)
g magnitude 19.05 (0.01) 19.05 (0.01) 19.05 (0.01)
r magnitude 19.25 (0.01) 19.25 (0.01) 19.26 (0.02)
i magnitude 19.42 (0.02) 19.42 (0.02) 19.43 (0.02)
z magnitude 19.60 (0.08) 19.60 (0.08) 19.59 (0.07)
G magnitude 19.12 (0.03) 19.17 19.12 19.12 (0.003)
BP magnitude 19.12 (0.03) 19.09
RP magnitude 19.11 (0.03) 19.10
Pan g magnitude 19.08 (0.007)
Pan r magnitude 19.26 (0.007)
Pan i magnitude 19.46 (0.006)
Pan z magnitude 19.64 (0.03)
Pan y magnitude 19.77 (0.05)
E(B-V) 0.045

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.