SDSS J081642.90+064740.5

All names: Gaia DR3 3096712858261181184, SDSS J081642.90+064740.6, Gaia EDR3 3096712858261181184, Gaia DR2 3096712858261181184, GALEX J081642.9+064740, SDSS J081642.90+064740.4, SDSS J081642.90+064740.5, SDSS J081642.90+064740.60

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 Kleinman et al. 2013
Right ascension 08 16 42.91 (0.6) 08 16 42.90 08 16 42.91 (0.9) 08 16 42.90 (0.6) 08 16 42.91 08 16 42.90
Declination 06 47 40.41 (0.5) 06 47 40.48 06 47 40.42 (0.6) 06 47 40.46 (0.5) 06 47 40.55 06 47 40.57
Spectral type DB DB DB HeSDB: DB
Effective temperature [K] 39768.0 (4362) 44814.0 35775.0 26938.0 39873.0 (347) 32812.0 (2115)
log(g) [cgs] 8.21 (0.5) 8.20 7.65 7.29 7.68 (0.3) 8.11 (0.3)
Mass [M] 0.75 (0.3) 0.752 0.467 0.334 0.679 (0.2)
log(Luminosity) [L] -0.54 (0.4)
Cooling age [Gyr] 0.0040 (0.002) 0.0151
log(H/He) -2.51
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] -0.14 (0.8) 0.69 (1) 0.69 (1)
Distance [pc] 1440.15 (2167) 1440.09 (2167)
Composition He He
Proper motion (right ascension) [mas/yr] 2.898385676 (0.8) 4.423832391 (2) 2.898 (0.8) 9.5
Proper motion (declination) [mas/yr] -3.103034958 (0.7) -3.85196997 (1) -3.103 (0.7) -6.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.65 (0.03) 19.70 (0.04) 19.71 (0.04) 19.73 (0.04)
g magnitude 19.94 (0.01) 19.97 (0.02) 19.97 (0.02) 19.98 (0.02)
r magnitude 20.38 (0.02) 20.43 (0.04) 20.42 (0.04) 20.44 (0.04)
i magnitude 20.68 (0.04) 20.74 (0.08) 20.73 (0.08) 20.74 (0.08)
z magnitude 20.77 (0.2) 22.87 (1) 22.69 (0.9) 22.70 (0.9)
G magnitude 20.17 (0.09) 20.21 20.17 (0.007)
BP magnitude 20.04 (0.09) 19.89
RP magnitude 19.96 (0.09) 20.27
Pan g magnitude 20.02 (0.008)
Pan r magnitude 20.35 (0.02)
Pan i magnitude 20.77 (0.04)
Pan z magnitude 20.83 (0.03)
Pan y magnitude
E(B-V) 0.024

* 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.