USNO-B1.0 1041-00640691

All names: SDSS J222833.82+141036.9, SDSS J222833.82+141037.0, Gaia EDR3 2734423845627830400, SDSS J222833.82+141036.8, WD 2226+139, GALEX J222833.8+141036, Gaia DR2 2734423845627830400, Gaia DR3 2734423845627830400, SDSS J222833.83+141036.7, USNO-B1.0 1041-00640691

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 MWDD HE Gaia DR2 Stilism sdss-wdms.org (29/04/2016) Koester & Kepler 2015 Eisenstein et al. 2006 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 28 33.83 (0.3) 22 28 33.82 22 28 33.83 (0.5) 22 28 33.82 22 28 33.82 22 28 33.83 22 28 33.82 (0.3) 22 28 33.19 22 28 33.82
Declination 14 10 36.78 (0.3) 14 10 36.90 14 10 36.79 (0.6) 14 10 36.91 14 10 36.93 14 10 36.78 14 10 37.00 (0.3) 14 10 33.24 14 10 37.01
Spectral type DB DB+M: DB+M: DB+M: DB DB+dM DB dM DB+M DB+MS
Effective temperature [K] 35538.0 (1400) 18599.0 31724.0 (714) 33600.0 (500) 22157.0 (4317) 31638.0 (854)
log(g) [cgs] 7.99 (0.2) 8.04 7.76 (0.09) 7.91 (0.08) 8.36 (0.1) 8.09 (0.1)
Mass [M] 0.62 (0.08) 0.619 0.825 (0.1)
log(Luminosity) [L] -0.60 (0.1)
Cooling age [Gyr] 0.0058 (0.0006) 0.1021
log(H/He) <-2.8
log(C/He)
log(Ca/He) <-4.0
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] 2.80 (0.3) 2.43 (0.4) 2.80 2.80 (0.3)
Distance [pc] 357.52 (34) 411.90 (62) 432.00 (177) 646.00 357.52 357.51 (34)
Composition He He
Proper motion (right ascension) [mas/yr] 6.108664185 (0.4) 7.665750125 (0.9) 6.109 (0.4)
Proper motion (declination) [mas/yr] -13.47727453 (0.4) -11.25206766 (0.9) -13.477 (0.4)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS WDMS WDMS WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.60 (0.02) 18.61 18.61 (0.03) 18.60 (0.02) 18.61 18.63 (0.03)
g magnitude 18.73 (0.008) 18.77 18.77 (0.02) 18.73 (0.008) 18.77 18.77 (0.02)
r magnitude 19.05 (0.01) 19.08 19.08 (0.02) 19.05 (0.01) 19.08 19.07 (0.02)
i magnitude 19.35 (0.02) 19.38 19.38 (0.02) 19.35 (0.02) 19.38 19.37 (0.02)
z magnitude 19.69 (0.09) 19.67 19.66 (0.08) 19.69 (0.09) 19.67 19.65 (0.08)
G magnitude 18.91 (0.03) 18.95 18.91 18.91 (0.004)
BP magnitude 18.87 (0.03) 18.88
RP magnitude 19.13 (0.04) 19.10
Pan g magnitude 18.78 (0.006)
Pan r magnitude 19.11 (0.01)
Pan i magnitude 19.37 (0.007)
Pan z magnitude 19.62 (0.01)
Pan y magnitude 19.87 (0.05)
E(B-V) 0.048

* 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.